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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean journal of applied entomology
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Journal DOI :
Korean Society of Applied Entomology
Editor in Chief :
Volume & Issues
Volume 46, Issue 3 - Dec 2007
Volume 46, Issue 2 - Aug 2007
Volume 46, Issue 1 - Apr 2007
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Discovery of Pachynematus itoi Okutani (Hymenoptera: Tenthredinidae) infesting Larix kaempferi(Lamb.) Carriere from Korea
Park, Ji-Doo ; Shinohara, Akihiko ; Park, Il-Kwon ; Shin, Sang-Chul ; Byun, Bong-Kyu ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 1~4
DOI : 10.5656/KSAE.2007.46.1.001
Pachynematus itoi Okutani, belonging to the family Tenthredinidae(Hymenoptera), which infested Larix kaempferi(Lamb.) Carriere in the middle areas of Korea, is reported for the first time from Korea. External characteristics of adults are briefly redescribed with photos. Also its damages and bionomic data are discussed.
Rediscovery of Tinea translucens Meyrick (Lepidoptera: Tineidae) infesting the Stuffed Mammal in Korea
Kim, Seok ; Bae, Yang-Seop ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 5~11
DOI : 10.5656/KSAE.2007.46.1.005
The clothes moth, Tinea translucens Meyrick is reported for the first time from Korea, based on the specimens roaring the larvae. The larvae make silk-made case from the first instar and pupate in the case at mature stage. Photographs of adult genitalia, informations of occurrence and distribution in Korea are provided. Also a brief biological informations for the species are given.
An Aquatic Moths, Elophila turbata (Butler, 1881) (Lepidoptera, Crambidae, Nymphulinae) in Korea, with New Host Plants
Jin, Jae-Ho ; Ahn, Neung-Ho ; Bae, Yang-Seop ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 13~18
DOI : 10.5656/KSAE.2007.46.1.013
Morphological characters of adult and immature stages on Elophila turbata (Butler, 1881) belonging to subfamily Nymphulinae, family Crambidae are redescribed base on Korean materials. Also we observed biological characters of this species including host plants, Spirodela polyrhiza(L.) Schleiden, Salvinia natans (
) Allioni and Lemna perpusilla Torre. And, photographs of adult, genitalia and immature stages are provided.
Occurrence of Callipogon relictus Semenov (Coleoptera: Cerambycidae) in the Gwangneung Forest, Korea with Suggestions for the Conservation
Byun, Bong-Kyu ; Kwon, Tae-Sung ; Weon, Gap-Jae ; Jo, Dong-Gwang ; Lee, Bong-Woo ; Lee, You-Mi ; Choi, Hyeok-Jae ; Kim, Cheol-Hak ; Lee, Seung-Hwan ; Bae, Yang-Seop ; An, Seung-Lak ; Hong, Ki-Jeong ; Park, Shin-Young ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 19~25
DOI : 10.5656/KSAE.2007.46.1.019
A survey to investigate the inhabitation of Callipogon relictus Semenov and evaluate the population of the species in the Gwangneung Forest was conducted during last seven years. During the study, a female was observed in the forest in 2006 which confirmed a possibility of the inhabitation with a small population. Fortunately, a ovipositing female was observed in the forest during this study period in 2006. The female laid more than 20 eggs singly in the crack of bark of the Carpinus laxiflora Blume. We collated the all available data for the species with the present study including the previous reports to provide the information far the conservation plan. It will be needed the long term monitoring and various efforts for the conservation of the species will be need hereafter.
Seasonal Occurrence of Tobacco Cutworm, Spodoptera litura Fabricius and Beet Armyworm, Spodoptera exigua Hübner Using Sex Pheromone Traps at Different Locations and Regions in Yeongnam District
Bae, Soon-Do ; Kim, Hyun-Ju ; Lee, Geon-Hwi ; Park, Sung-Tae ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 27~35
DOI : 10.5656/KSAE.2007.46.1.027
Seasonal occurrences of tobacco cutworm, Spodoptera litura and beet armyworm, Spodoptera exigua were observed using sex pheromone traps at different locations and climatic regions in Yeongnam district. In Gyeongnam province, S. litura male adults kept occur from mid or late March to mid or late November Whereas in Gyeongbuk province, S. litura occurred from mid or late April to early or mid November with exception at Uljin where it was late May to late October. According to the climatic regions, the peak occurrence of S. litura was middle September at the southern coast region, late August at the inland and the basin region, middle August at the inland mountainous region, and early September at the eastern middle coast region. The occurrence rate of S. litura was the highest at Jinju with 20.0% and the lowest at Changyeong with 8.6% in Cyeongnam province, while it was the highest at Sungju with 3.3% and the lowest at Uljin with 0.8% in Gyeongbuk province. In accordance with the climatic regions, the occurrence rate of S. litura was the highest at the inland region with 43.7%, and followed by the southern coast region (36.3%), the basin region (8.4%) and the inland mountainous region (7.0%), and was the lowest at the eastern middle coast legion with 4.6%. On the other hand, S. exigua occurred from early March to middle November with the exception of the eastern middle coast region including Pohang, Yeongdeog and U]ien in Cyeongbuk province where it occurred from mfd April to middle November. The peak occurrence of s. exigua was early August at the inland region, the basin region and the inland mountainous region, and was late of August at the southern coast region and the eastern middle coast region. The occurrence of S. exigua was the highest at Changyeong with 1.6% and the lowest at Busan with 0.4% in Gyeongnam province, while it was the highest at Sungju with 37.2% and the lowest at Uljin with 2.7% in Gyeongbuk province. The climatic regional occurrence rate of S. exigua was the highest at the basin region with 54.3%, and followed by the inland mountainous region (29.9%), the eastern middle coast region (9.3%) and the inland (3.9%), and was the lowest at the southern coast region with 2.6%. As a whole, S. litura occurred more in Gyeongnam province than Cyeongbuk province, while S. exigua occurred more in Gyeongbuk province than Gyeongnam province. According to the regions grouped by climatic differences, the occurrence of S. litura and S. exigua was the highest at the inland region in Gyeongnam province and at the basin region in Gyeongbuk province. The total number of S. litura captured by sex pheromone trap was 2.4 times higher than that of S. exigua. However, the first occurring time and the peak occurrence of S. exigua were slightly earlier than those of S. litura.
Life Table of the Greenbug, Schizaphis graminum (Rondani) (Homoptera: Aphididae) on Barley, Hordeum vulgare L.
Kim, Ji-Soo ; Lee, Jang-Ho ; Kim, Tae-Heung ; Lee, Sang-Guei ; Yun, Jong-Chul ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 37~42
DOI : 10.5656/KSAE.2007.46.1.037
To construct a life table and development model Schizaphis graminum (Rondani), its adult longevity and fecundity were studied at various constant temperatures ranging from 15 to
RH, and a photoperiod of 16L:8D. Adult longevity of the greenbug gradually increased with decreasing temperature below
. Total fecundity was not significantly different at all temperatures except at
. Daily fecundity gradually increased from
. It was 3.6 at
and as temperatures either went down or up, it decreased to 1.4 at
and 0.4 at
Net reproduction rate (Ro) was highest with 47.6 at
. The intrinsic rate of increase per day
and the finite rate of increase per day
were highest with 0.4 and 1.5 at
, respectively and the doubling time (Dt) was shortest with 0.98 at
. The mean generation time (T) was 8.41 at
Ecological Characteristics and Storage Condition of Diglyphus isaea(Walker) (Hymenoptera: Eulophidae), an Ectoparasite of Liriomyza trifolii(Burgess) (Diptera: Agromyzidae)
Kim, Jeong-Hwan ; Byoun, Young-Woong ; Kim, Yong-Heon ; Kim, Hwang-Yong ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 43~49
DOI : 10.5656/KSAE.2007.46.1.043
Experiments have been performed to investigate biological characteristics of Diglyphus isaea (Walker), an ectoparasite of Liriomyza trifolii (Burgess). At
, development time of D. isaea was estimated as 1.3 days for eggs, 4.5 days for larvae and 6.3 days for pupae. Adult longevity was 25.1 days, and a female adult could lay 305.3 eggs throughout its lifetime. Number of L. trifolii parasitized or killed by the wasp was 962.2 individuals/adult. Most of all parasitized or killed larvae were identified as third instar. With 20% honeyed water as food source, half of the adults could survive 180 days at
, 150 days at
, and 90 days at
. After storing at
with absolute honey for 30 days, 70 days and 140 days, a female adult in room temperature laid eggs 190.8 individuals, 104.0 individuals and 89.4 individuals, respectively.
Effects of Temperature on The Development and Reproduction of Cletus punctiger Dallas and Cletus schmidti Kiritshenko (Heteroptera : Coreidae) on Rice
Paik, Chae-Hoon ; Choi, Man-Young ; Seo, Hong-Yul ; Kim, Jae-Duk ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 51~56
DOI : 10.5656/KSAE.2007.46.1.051
The two species of rice bugs causing pecky rice, Cletus punctiger and Cletus schmidti are often observed coexisting in the rice fields of nearby fallow land. Direct feeding damage to rice by C. punctiger and C. schmidti can lead to a reduction in grain quality and quantity. These studies were carried out to investigate the development of C. punctiger and C. schmidti at various constant temperatures ranging from 20 to
, 65% RH, and a photoperiod of 16L:8D. Egg hatchability of C. punctiger/C. schmidti at the temperatures of 20, 25 and
were 80.6/88.0, 91.7/96.3, 96.4/96.2%, respectively. The development periods of eggs of C. punctiger/C. schmidti at the temperatures of 20, 25, and
were 16.4/18.4, 9.4/10.2 and 6.4/7.3 days, respectively. Mean developmental periods of 1 st, 2nd, 3rd, 4th and 5th nymphs of C. punctiger/c. schmidti at
were 2.1/2.0, 3.5/4.0, 3.3/5.6, 3.2/4.8 and 5.8/6.9 days, respectively. Oviposition began 8.1 days after emergence at
, and the longevity of female and male were 120.0 and 117.3 days, respectively. Total number of eggs through the life of female were 245.5 laying 2.2 eggs a day in average at
. The development periods of egg and nymphs of C. punctiger were relatively shorter than those of C. schmidti. Availability of male had affected the egg hatchability greatly that laid at 30th day after 60 days period of oviposition in the presence of adult male of C. punctiger. The fertile eggs laid by the female together with male was 92.1% but those without male was only 9.6%.
Genetic Identity of a Korean Isolate of an Endoparasitoid Cotesia plutellae(Hymenoptera: Braconidae), Among Reproductive Incompatibility Types
Park, Jung-A ; Kim, Yong-Gyun ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 57~62
DOI : 10.5656/KSAE.2007.46.1.057
Reproductive incompatibility is an Important factor to select a specific biologlcal control agent for successful augmentation of the corresponding endogenous population. An endoparasitoid, Cotesia plutellae (Kurdjumov), is an effective control agent to diamondback moth, Plutella xylostella (L.) and has been known to be classified into two groups in terms of reproductive incompatibility. This study analyzed an Korean population of C. plutellae in terms of morphological characters and mitochondrial DNA marker, which did not match with either of two reproductive incompatibility groups. These results suggest that a Korean population of C. plutellae can be involved in a novel reproductive group. For any augmentation program of C. plutellae in Korea, reproductive incompatibility should be seriously considered to select a particular exotic population.
Gain Threshold Estimation for Some Pests in Major Crops
Park, Hong-Hyun ; Yeh, Wan-Hae ; Park, Hyung-Man ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 63~69
DOI : 10.5656/KSAE.2007.46.1.063
This study was conducted to examine the problems that would arise in our cropping systems when introducing Gain Threshold (GT) which is an important element in determining Economic Injury Level (EIL). Cain Threshold (GT) can be defined as the amount of damage (
Evaluation of Biological Control of Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) using Diglyphus isaea (Walker) (Hymenoptera: Eulophidae) in Three Seasonal Culture Types of Tomato Greenhouse
Kim, Jeong-Hwan ; Byoun, Young-Woong ; Lee, Gwan-Seok ; Kim, Hwang-Yong ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 71~78
DOI : 10.5656/KSAE.2007.46.1.071
Biological control of Liriomyza trifolii (Burgess) using Diglyphus isaea (Walker) has been evaluated in tomato greenhouse, for three seasonal culture types: spring type (March-July), summer type (June-October) and autumn type (July-December). For spring type, totally 5.8
of D. isaea has been released at six times from late April, when the density of L. trifolii was about 1.0 individuals/plant. Corrected mortality of Liriomyza trifolii caused by parasitoids was 97.6% at early July, and the proportion of D. isaea was 88.9% of all parasitoids collected in the greenhouse. In the case of summer type, totally 1.8
of D. isaea has been released at five times from early July, when the density of 1. trifolii was about 0.4 individuals/plant. Corrected mortality of L. trifolii caused by parasitoids was 84.4% during the whole season, but the proportion of D. isaea was very low (only 13.8%). Immigrating parasitoids such as Chrysocharis penthus were synchronized to control the leafminer in the greenhouse. For autumn type, totally 2.7
of D. isaea has been released at four times from mid September, when the density of L. trifolii was about 0.7 individuals/plant. Corrected mortality of f. trifolii caused by parasitoids was 85.7% at mid December, and the proportion of the D. isaea was 83.4%.
Areal Distribution and Parasitism on Other Soybean Bugs of Trissolcus nigripedius (Hymenoptera: Scelionidae), an Egg Parasitoid of Dolycoris baccarum (Heteroptera: Pentatomidae)
Lim, Un-Taek ; Park, Kyung-Soo ; Mahmoud, Ali M.A. ; Jung, Chul-Eui ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 79~85
DOI : 10.5656/KSAE.2007.46.1.079
From the surveys of 2005 and 2006 in Korea, Trissolicus nigripedius was found in four locations, i.e., Andong, Miryang, Namhae, and Suwon, and one of the major egg parasitoids of Dolycoris baccarum. T. nigripedius was also found to parasitize two other soybean bugs, Riptortus clavatus and Piezodous hybneri, from the field collection in 2005. Host acceptance behaviors of T. nigripedius consisting of drumming, oviposition, and marking were observed and compared on five species of soybean bugs. T. nigripedius showed the complete host acceptance behaviors on the eggs of D. baccarum, P. hybneri, and Halyomorpha halys. But T. nigripedius emerged only from the eggs of D. baccarum (96%) and P. hybneri (75%) after 24 hours of exposure. T. nigripedius did not mark on the eggs of R. clavatus and Nezara antennata during the observation of behavior, hence no egg deposition was made. However, T. nigripedius parasitized 20% and killed 30% of the eggs of R. clavatus when 24 hours were given for parasitization. T. nigripedius would be a potential biological control agent of D. baccarum and P. hybneri with ability of giving additional mortality on R. clavatus in soybean field.
Effects of Environment Friendly Agricultural Materials to Phytoseiulusc persimilis (Acari: Phytoseiidae) in the Laboratory
Kang, Myong-Ki ; Kang, Eun-Jin ; Lee, Hee-Jin ; Lee, Dae-Hong ; Seok, Hee-Bong ; Kim, Da-A ; Gil, Mi-La ; Seok, Mi-Ja ; Yu, Yong-Man ; Youn, Young-Nam ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 87~95
DOI : 10.5656/KSAE.2007.46.1.087
Many kinds of environment friendly agricultural materials were used for the insect pest control and the control of plant diseases, furthermore they support the growth of crops in the greenhouses and the kindly environment friendly farming. Phytoseiulus persimilis might be used for control of two-spotted mites with environment friendly agricultural materials at the same time. For testing the toxicity of environment friendly agricultural materials against to p. persimilis, 61 environment friendly agricultural materials were selected by material contents and using methods. When environment friendly agricultural materials were directly sprayed on P. persimilis, IEFAM C, FEFAM A, EFAMSM A, D, EFAMPE A, EFAMCh B, EFAMME A, and EFAMMo C killed over 90%. However, there was no effects to FEFAM C, D, EFAMSM C, EFAML A, EFAMME C, E, H, J, EFAMMo G and I against P. persimilis. P. persimilis adults were not survived in vial for 48 hours after sprayed and dried with the environment friendly agricultural materials, fer examples, EFAMSM I, EFAMME A, EFAMMo A, C, and I. Otherwise, EFAMCh C and EFAMMo B were no effects to P. persimilis. Some environment friendly agricultural materials are of different qualities, and consequently test of their foxily have to necessary.
Effects of Environment Friendly Agricultural Materials to Each Developmental Stages of Harmonia axyridis(Coleoptera: Coccinellidae) in the Laboratory
Kang, Eun-Jin ; Kang, Myong-Ki ; Lee, Hee-Jin ; Lee, Dae-Hong ; Seok, Hee-Bong ; Kim, Da-A ; Gil, Mi-La ; Seo, Mi-Ja ; Yu, Yong-Man ; Youn, Young-Nam ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 97~107
DOI : 10.5656/KSAE.2007.46.1.097
The multicolored Asian ladybird beetle (Harmonia axyridis) has been commonly used with biological control agents for control of several kinds of aphids in agroecosystems. Also, environment friendly agricultural materials have been commonly applied in crop fields because the government held down pesticide application and environment friendly agricultures are gradually increased with consumer`s desires. The multicolored Asian ladybird beetles may be directly or indirectly under the influence of environment friendly agricultural materials In crop fields. The insecticidal environment friendly agricultural materials (IEFAMs) might be saff against each developmental stage of multicolored Asian ladybird beetle. Fungicidal environment friendly agricultural materials (FEFAMs) had a miner effect to each developmental stage of multicolored Asian ladybird beetle with the exception of FEFAM A. Environment friendly agricultural materials contained useful soil microorganisms (EFAMSMs) C and H might be down the hatching rate of eggs, and EFAMSM A and F had a killing effect to 1st instar of lady beetles. Environment friendly agricultural materials contained plant extracts (EFAMPEs) A and D might be suffered effect a deathblow of egg hatching with lady beetles. Otherwise, there was a miner effect to lady beetles with the rest of tested environment friendly agricultural materials.
Occurrence and Damage of Golden Apple Snail (Pomacea canaliculata : Ampullariidae) in Jeonnam Province of South Korea
Kim, Do-Ik ; Kim, Seon-Gon ; Choi, Kyeong-Ju ; Kang, Beom-Ryong ; Park, Jong-Dae ; Kim, Jeong-Jun ; Choi, Dong-Ro ; Park, Hyeong-Man ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 109~115
DOI : 10.5656/KSAE.2007.46.1.109
This study was carried out to determine occurrence and damage of golden apple snail, Pomacea canaliculata on water seeding area in Jeonnam province. The density of golden apple snail maintained hlgh until October 2003, but quickly decreased from November. They overwintered only in a portion of the water canals but could not find in dried paddy field. They reproduced from May and June in the canal water and paddy field, respectively. Feeding time of golden apple snail on rice seedlings was 235.2 seconds, feeding length of that was 8.4cm. When golden apple snail fed rice seedlings, the stem remain only 2.5cm from areal part which could not recover. The more density of golden apple snail, the fester feeding rate. Density and number of eggs laid of golden apple snail after overwintering was higher on bank around of paddy field than on middle of that. The percent of shell size after over wintering was higher in small (below 25mm) than big (over 36mm). But in case of Boseong area, the slze was reverse because the soil has soft mud. The survival rate of overwintering golden apple snail was lower than that of breeding. They did not move when the temperature changed rapidly, but the temperature increased they start to move. They dead almost below
. The damage of rice by golden apple snail in the direct water seeding was 20%. In machine transplanting, rice damaged only fore-end of leaf and recovered subsequently. When golden apple snail release in direct water seeding field, the percent of damage was 5.6% in immediately release plot. The later release, the lower damage.
Management of Golden Apple Snail (Pomacea canaliculata; Ampullariidae) Using Duck and Fish Trap
Kim, Do-Ik ; Kim, Seon-Gon ; Choi, Kyeong-Ju ; Kang, Beom-Ryong ; Kim, Jeong-Jun ; Park, Hyeong-Man ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 117~122
DOI : 10.5656/KSAE.2007.46.1.117
This study was investigated the potential of ducks and fish trap for the control of golden apple snail, Pomacea canaliculata, in paddy field and water canals. The smaller size of duck (700g) preyed snails than the bigger one (1,300g). The consumption of two ducks was bigger under plastic house. They preyed over 90% on the second days of release. The release time of ducks was more effective at seven days after inoculation of snails than simultaneous. Duck could suppress the density of snails at any time from month after inoculation. Four ducks per
could control snails in an irrigation canals. The number of attracted golden apple snail per week was 216 in big fish trap
with menthol paste which for a carp.
Development of the Artificial Insemination Instrument of Bumblebee Queens
Yoon, Hyung-Joo ; Cho, Young-Hee ; Baer, Boris ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 123~129
DOI : 10.5656/KSAE.2007.46.1.123
An artificial insemination instrument of bumblebee queens was firstly developed. This instrument consists of location tube, transfer tube, holding tube, head product, and probe apparatus for reproductive tract etc. This instrument was designed to minimize stress and damage of reproductive tract of bumblebee queens. The regulator handle apparatus in artificial insemination instrument was used the principle of lever, that manipulates easy, accurate and rapid insemination of bumblebee queens. By using this instrument, the insemination rate was over 90%. This instrument will be useful for the breeding and conservation of excellent character of bumblebees.
Screening of Bacteria Producing Lipase from Insect Gut: Isolation and Characterization of a Strain, Burkholderia sp. HY-10 Producing Lipase
Park, Doo-Sang ; Oh, Hyun-Woo ; Bae, Kyung-Sook ; Kim, Hyang-Mi ; Heo, Sun-Yeon ; Kim, Nam-Jung ; Seol, Kwang-Youl ; Park, Ho-Yong ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 131~139
DOI : 10.5656/KSAE.2007.46.1.131
From the course of screening of useful enzyme producing microorganism from insect guts, we isolated 9 lipase producing strains and their lipase producing activities were tested. 16S rDNA sequence analysis showed that they were Gram negative bacteria grouped on Serratia sp., Pseudomonas sp., and Burkholderia sp.. Among them, an excellent lipase producing strain, Burkholderia sp. HY-10 identified by 16S rDNA analysis and biochemical methods, was further studied its lipase producing characteristics. It was isolated from a longcorm beetle, Prionus insularis and showed cell density dependent lipase producing activity in the culture media that contained olive oil as a carbon source. Maximum lipase production was achieved in the M9 media containing 0.5% yeast extract and 0.5% olive oil when cultured at
for 36-42 hrs.
Development of the Greenbottle Blowfly, Lucilia sericata, under Different Temperatures
Kim, Hyeon-Cheol ; Kim, Soo-Jung ; Yun, Ji-Eun ; Jo, Tae-Ho ; Choi, Byeong-Reol ; Park, Chung-Gyoo ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 141~145
DOI : 10.5656/KSAE.2007.46.1.141
Maggot therapy (MT) has been re-introduced for non-healing wounds such as pressure sore, diabetic and necrotic ulcers, as well as infected surgical wounds, burn, and trauma injuries since early 1990s. For the production of sterile maggot of proper developmental stage, Lucilia sericata were studied on developmental periods of immature stages on liver agar medium under six different temperatures such as 15.4, 20.6, 22.5, 26.2, 29.1, and
, and adult longevity and egg Production under
. The periods of eggs and larvae of the 1st and the 2nd instars were shortest at
by 9.0, 14.0 and 18.6 hours, respectively. The periods of the 3rd instar larvae and pupae were shortest at
by 285.0 and 171.0 hours, respectively. Developmental zero point and total effective temperature far the development of each stage were calculated based on the developmental periods. Adults of both female and male lived more than one month. Females laid an average of 338.5 eggs through 2.7 times of egg laying throughout her lifetime.
Susceptibility of the Alfalfa Weevil, Hypera postica (Coleoptera: Curculionidae) to Korean Entomopathogenic Nematodes in Laboratory Assays
Kim, Hyeong-Hwan ; Han, Gun-Yeong ; Park, Chung-Chan ; Choo, Ho-Yul ; Cho, Sung-Rae ; Lee, Heung-Soo ; Lee, Dong-Woon ; Park, Chung-Gyoo ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 147~151
DOI : 10.5656/KSAE.2007.46.1.147
Laboratory tests were conducted to determine the susceptibility of the alfalfa weevil, Hypera postica to Korean entomopathogenic nematodes, Steinernema carpocapsae GSN1 strain (ScG), S. glaseri Dongrae strain (SgD), Heterorhabditis bacteriophora Hamyang strain (HbH), and Heterorhabditis sp. Gyeongsan strain (HeG) at the petri dish assay. The larval mortality of H. postica was significantly different depending on nematode species and treatment concentration. SgD and HeG strain were more effective against H. postica larva than ScG and HbH strain. When SgD and HeG strain were treated with the rate of >20 infective juveniles (ijs) per alfalfa weevil larva, mortality was ca. 77.5-100% at the late instars of H. postica in 3 days. The number of established nematode was significantly different depending on nematode species, whereas number of progeny was not significantly different. The mean number of established us of SgD strain in a host was the highest at 80 ijs by 30.2. The highest progeny number of HeG strain was 2,671.5 with 80 ijs. All nematode strains were not parasitic entirely to H. postica adults. These results show that alfalfa weevil late larva is highly susceptible to Korean entomopathogenic nematodes in the laboratory
Development of Observation Methods for Density of Stink Bugs in Soybean Field
Bae, Soon-Do ; Kim, Hyun-Ju ; Lee, Geon-Hwi ; Park, Sung-Tae ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 153~158
DOI : 10.5656/KSAE.2007.46.1.153
This study was conducted to develope the observing methods for density of stink bugs in soybean reproductive stage. The adults and nymphs of bean bug, Riptortus clavatus, red-banded shield bug, Piezodous hybneri, green stink bug, Nezara antennata, Sole bug, Dolycoris baccarum, and brown marmorated stink bug, Halyomorpha halys were observed by three observing methods such as beating, sweeping net, and visual counting methods in the full bloom (R2), full pod (R4) and beginning maturity (R7) of soybean. As a result, total number of stink bugs observed was the highest with 5,214.2 by beating method, and then was 2,581.8 by visual counting method, and was the lowest with 103.1 by sweeping net method. Total number of stink bugs observed by the beating and visual counting methods was P. hybneri, followed by N. antennata, H. halys, R. clavatus and D. baccarum with clear difference in observed number of each stink bugs while total number of stink bugs observed by sweeping net method was very low in the range of 18 to 23. Accordingly, the observed density of stink bugs exception of R. clavatus adult by beating method was generally high. However, the number of R. clavatus adult was more observed by flushing method than that by beating method from the beginning bloom (R1) to full maturity (R8), and was more observed at morning time than that at afternoon time. Therefore, two observation methods that flushing method for R. clavatus and beating method for the other stink bugs were recommended for the occurring density of stink bugs in soybean because both bean bug and pentatomidae stink bugs have distinct behavior characteristics such as flying and dropping.
Occurrence of Pea Weevil, Bruchus pisorum Linnaeus (Coleoptera: Bruchidae) and Its Control Efficacy of Insecticides in Yeongnam District
Kim, Hyun-Ju ; Bae, Soon-Do ; Lee, Geon-Hwi ; Park, Sung-Tae ; Park, Chung-Gyoo ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 159~164
DOI : 10.5656/KSAE.2007.46.1.159
Pea weevil was easily observed in the flower and pod of garden pea, but not observed in soybean at various locations in Yeongnam district through 2001 to 2003. Number of pea weevil observed in pea flower was the highest at Milyang (20), followed by Yangsan (15), Sacheon (14) and Changnyong (13), and was the lowest at Pohang (3). On the other hand, number of pea weevil observed in pea pod was the highest at Tongyeong (192), followed by Changnyong (171), Sacheon (157) and Changwon (138), and was the lowest at Pohang (12) which showed simila. tendency with the result of pea flower. Number of pea weevil occurrence observed in pea pod after one and two times applications of Insecticides in pea field were different at harvest day of 30th May while were not significantly different at harvest day of 5th June. Likewise, number of pea pod damage after one and two times applications of insecticides were different at harvest day of 10th May while was not different at harvest day of 5th June. Thus, control efficacies of insecticides according to application times against pea weevil showed very high with above 95% at harvest day of 6th June while showed variable control efficacies at harvest of 30th May.
Population Dynamics and Damages of White Grubs in Sweet Potato Fields
Paik, Chae-Hoon ; Lee, Geon-Hwi ; Choi, Man-Young ; Kim, Doo-Ho ; Choi, Dong-Ro ; Seo, Hong-Yul ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 165~168
DOI : 10.5656/KSAE.2007.46.1.165
This experiment was conducted to investigate population dynamics of white grubs and its damages in sweet potato fields. There were three species of white grubs that fed on the roots of sweet potato in Honam area. Among them, Holofrichia parallela was a major insect pest. Damage rate of sweet potato by white grubs were about 2 to 40% differed with regions. In some region where it was severe the damage rate of sweet potato was about 80% or more. H. parallela overwintered as a late 3rd instar larvae in soil from late October to late-June, and the survival rate of them was 92%. The occurrence pattern of H. parallela larvae varied in different seasons. In sweet potato field, H. parallela larvae populations started being observed during late-July to mid.-August. The damage by the grub began to occur late-August in field and lasted to the harvest time.
Cytochrome Oxidase Subunit II (COII) Sequence Analysis of Root-knot Nematode, Meloidogyne sp. HSC, Infesting Yam (Dioscorea bulbifera)
Han, Sang-Chan ; Kang, Sang-Jin ; Kim, Yong-Gyun ;
Korean journal of applied entomology, volume 46, issue 1, 2007, Pages 169~173
DOI : 10.5656/KSAE.2007.46.1.169
Root-knot nematode damage was found on yam, Dioscorea bulbifera in Andong Korea. From the root-knots, female nematodes were isolated and subjected to DNA sequence analysis. Sequence of cytochrome oxidase subunit II (COII) was analyzed from the genomic DNA of the isolate. COII locus size and sequence of the nematode isolate were similar to those of Meloidogyne javanica or M. incognita. However, an analysis of HinfI restriction site, a species-specific character between these two species, showed that the isolate did not match to either M. javanica or M. incognita.