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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean journal of applied entomology
Journal Basic Information
Journal DOI :
Korean Society of Applied Entomology
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Volume & Issues
Volume 53, Issue 4 - Dec 2014
Volume 53, Issue 3 - Sep 2014
Volume 53, Issue 2 - Jun 2014
Volume 53, Issue 1 - Mar 2014
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Occurrence of Fruit Flies (Diptera: Tephritidae) in Fruit Orchards from Myanmar
Win, Nan Zarchi ; Mi, Khin Mi ; Oo, Thi Tar ; Win, Kyaw Kyaw ; Park, Jinyoung ; Park, Jong Kyun ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 323~329
DOI : 10.5656/KSAE.2014.06.0.011
Population of fruit flies was monitored by using methyl eugenol trap during 2010-2011 in Yezin, Myanmar. Population numbers were analyzed with meteorological factors including rainfall, temperature, relative humidity and duration of sunshine. Samples of mango, guava, and jujube fruits were collected from orchards. The fruits were kept in containers so that the species of flies infesting the fruit could be identified when the adult insects emerged and to assess damage caused by fruit flies. Regression analyses indicated that populations of fruit flies were observed to be positively correlative with rainfall, minimum temperature and relative humidity, and negatively correlative with the duration of sunshine. Eleven species of fruit flies, Bactrocera arecae, B. carambolae, B. correcta, B. dorsalis, B. kandiensis, B. latilineola, B. malaysiensis, B. neocognata, B. raiensis, B. verbascifoliae, and Carpomya vesuvina, were identified. B. correcta and B. dorsalis were the most abundant and accounted for 29.3% and 28.6% of total emerged adults in the different fruit samples. The highest percentage of fruit damage was observed on guava (
), followed by mango (
) while the lowest was recorded on jujube (
Inhibitory Effects of a Recombinant Viral Cystatin Protein on Insect Immune and Development
Kim, Yeongtae ; Eom, Seonghyun ; Park, Jiyeong ; Kim, Yonggyun ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 331~338
DOI : 10.5656/KSAE.2014.09.0.041
Cystatins (CSTs) are reversible and competitive inhibitors of C1A cysteine proteases, corresponding to papain-like cathepsins in plants and animals. A viral CST (CpBV-CST1) was identified from a polydnavirus, Cotesia plutellae bracovirus (CpBV). Our previous study indicated that a transient expression of CpBV-CST1 interfered with immune response and development of Plutella xylostella larvae. To directly demonstrate the protein function, this study produced a recombinant CpBV-CST1 protein (rCpBV-CST1) using bacterial expression system to determine its inhibitory activity against cysteine protease and to assess its physiological alteration in insect immune and development. The open reading frame of CpBV-CST1 encodes a polypeptide of 138 amino acids (
). rCpBV-cystatin protein in BL21 STAR (DE3) competent cells containing a recombinant pGEX4T-3:CpBV-CST1 was over-expressed by 0.5 mM IPTG for 4 h. In biological activity assay, the purified rCpBV-CST1 showed a significant inhibition against papain activity. It inhibited a cellular immune response of hemocyte nodule formation in the beet armyworm, Spodoptera exigua. Moreover, its oral administration retarded larval development of the diamondback moth, Plutella xylostella in a dose-dependent manner. These results suggest that CpBV-CST1 may be applied to control insect pest populations.
Effects of Immersion Temperatures and Times on Chestnut Fruit and Mortality of the Chestnut Weevil, Curculio sikkimensis Heller
Kim, Young-Jae ; Kim, Hyun Kyung ; Lee, Ka-Soon ; Kim, Gil-Hah ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 339~346
DOI : 10.5656/KSAE.2014.09.0.026
To control populations of the chestnut weevil, Curculio sikkimensis Heller, the effects of various immersion temperatures and times on the chestnut weevil were tested. The effects of immersion treatments on chestnut fruits were also analyzed. The mortality levels of C. sikkimensis larvae were evaluated at various temperatures (
) and time intervals (1, 2, 3, 5, 7, 10, 15, 22, and 24 h). Changes in the chestnut fruit due to the immersion treatment were measured in terms of color (lightness, redness, and yellowness), physiological effects (germination rate and decay rate), hardness, and change in constituent properties (moisture content, free sugar content, and tannin content). Mortality levels of C. sikkimensis larvae after immersion treatment at
were over 70% and 100% after 2 h and 7 h, respectively. Color (lightness, redness, and yellowness) of the chestnut fruits was not significantly different at
however, the color was affected at temperatures over
. The germination rate of the fruit was not affected by the immersion treatments, but the decay rate at
increased with an increase in immersion time. The hardness of the fruits decreased with an increase in immersion times and temperatures. These results can be used in the future for developing methods for the control of chestnut weevil populations.
Change of Butterfly Communities After Clear Cutting in Gwangneung Forest
Lee, Cheol Min ; Kwon, Tae-Sung ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 347~354
DOI : 10.5656/KSAE.2014.09.0.042
This study was carried out to clarify the change of butterfly community after clear cutting. Butterfly survey was conducted in clear cutting area, forest road, and forest using line transect method from May to November in 2011. A total of 32 species and 398 individuals of butterflies were observed. Abundance of food niche breadth and habitat type was significantly higher in clear cutting area than in forest. Estimated species richness and species diversity were significantly higher in clear cutting area than in forest. In clear cutting area, Leptidea amurensis and Argynnis niobe, vulnerable species, were abundant. This result suggests that grasslands formed by clear cutting play an important role to increase butterfly diversity in forest ecosystem.
Overwintering Conditions of the Diamondback Moth and Genetic Variation of Overwintering Populations
Kim, Eunseong ; Choi, Bongki ; Park, Youngjin ; Cha, Ookhyun ; Jung, Chungryel ; Lee, Daeweon ; Kim, Kwangho ; Kim, Yonggyun ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 355~365
DOI : 10.5656/KSAE.2014.09.0.035
It has been unclear whether the diamondback moth, Plutella xylostella can overwinter in Korean field conditions. This study determined overwintering conditions of P. xylostella by conducting field exposure tests based on its cold tolerance and monitoring overwintering populations by direct examination of overwintering larval habitats and capturing adults with sex pheromone traps. In addition, the overwintering populations were analyzed using polymorphic genetic markers to trace their sources. When all immature stages of P. xylostella were exposed to
, which was the temperature much above their supercooling points, they significantly suffered with direct cold injuries, where larval stage was most tolerant to the cold injury. However, the exposure to
for a long period (4 weeks) did not give any significant cold injury to nonfeeding stages, while this treatment gave lethality to larval stage without diet. When all developmental stages of P. xylostella were exposed to open field conditions during winter, they exhibited significant decreases of survival rates. However, some protected and indoor conditions reduced the cold injuries and the diet provision significantly increased larval survival rates. Adult monitoring with sex pheromone during winter period indicated that the first captures were observed at similar periods at different locations (
Km apart). The overwintering adults were captured until early April. Genetic variation of these overwintering populations was analyzed with polymorphic molecular markers, indicating significant genetic divergences among the overwintering populations. This study indicates that P. xylostella can overwinter in southern Korean fields or some protected greenhouses with host plants.
Recycling Agricultural Wastes as Feed for Mealworm (Tenebrio molitor)
Kim, Sun Young ; Chung, Tae-Ho ; Kim, Seong-Hyun ; Song, Sungho ; Kim, Namjung ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 367~373
DOI : 10.5656/KSAE.2014.10.0.043
In order to investigate the impact of recycling agricultural wastes as feed for mealworm (Tenebrio molitor), we evaluated the replacing effect by the different level of tangerine shell, Chinese cabbage, king oyster mushroom (Pleurotus eryngii) and Enoki mushroom (Flammulina velutipes) substrates on wheat bran feed. Larval survival rate, larval weight, developmental period of larva, pupation rate and pupal weight were evaluated. In tangerine shell and Chinese cabbage replacement group, no replacing effects found. In all groups replacing by spent King oyster mushroom (Pleurotus eryngii) substrate, survival rate of larva was similar to that of control group but larvae weighed less than control group significantly. Developmental period of larva increases in the group of King oyster mushroom substrate replacement. Larval and pupal weight in Enoki mushroom (Flammulina velutipes) substrate by the level of 40 and 50%, replacement effect showed best results in successive breeding considering pupation rate. It is concluded that replacing 40 and 50% of Enoki mushroom (Flammulina velutipes) substrate is appropriate to substituted diet of Tenebrio molitor larvae.
Sampling Plan for Bemisia tabaci Adults by Using Yellow-color Sticky Traps in Tomato Greenhouses
Song, Jeong Heub ; Lee, Kwang Ju ; Yang, Young Taek ; Lee, Shin Chan ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 375~380
DOI : 10.5656/KSAE.2014.10.0.044
The sweetpotato whitefly (SPW), Bemisia tabaci Gennadius, is a major pest in tomato greenhouses on Jeju Island because they transmit viral diseases. To develop practical sampling methods for adult SPWs, yellow-color sticky traps were used in commercial tomato greenhouses throughout the western part of Jeju Island in 2011 and 2012. On the basis of the size and growing conditions in the tomato greenhouses, 20 to 30 traps were installed in each greenhouse for developing a sampling plan. Adult SPWs were more attracted to horizontal traps placed 60 cm above the ground than to vertical trap placed 10 cm above the plant canopy. The spatial patterns of the adult SPWs were evaluated using Taylor's power law (TPL) and Iwao's patchiness regression (IPR). The results showed that adult SPWs were aggregated in each surveyed greenhouse. In this study, TPL showed better performance because of the coefficient of determination (
). On the basis of the fixed-precision level sampling plan using TPL parameters, more traps were required for higher precision in lower SPW densities per trap. A sequential sampling stop line was constructed using TPL parameters. If the treatment threshold was greater than 10 maximum adult SPWs on a trap, the required traps numbered 15 at a fixed-precision level of 0.25. In estimating the mean density per trap, the proportion of traps with two or more adult SPWs was more efficient than whole counting:
. The results of this study could be used to prevent the dissemination of SPW as a viral disease vector by using accurate control decision in SPW management programs.
Host Plant, Occurrence, and Oviposition of the Eurytomid wasp Eurytoma maslovskii in Korea
Lee, Sung-Min ; Kim, Se-Jin ; Yang, Chang Yeol ; Shin, Jong-Seop ; Hong, Ki-Jeong ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 381~389
DOI : 10.5656/KSAE.2014.10.0.047
We investigated the host fruit, seasonal occurrence, and oviposition habits of the eurytomid wasp, Eurytoma maslovskii that cause Japanese apricot fruit drops. This eurytomid wasp was found to occur in Gyeonggi-do, Chungcheongbuk-do, Chungcheongnam-do, Jeollanam-do, and Jeollabuk-do in Korea, and it attacked seeds of Japanese apricot, apricot, and peach. Overwintered larvae were observed until mid April, inside the stone of Japanese apricots. Pupation took place between late March and late April. More than 90% of the adult wasps emerged between late April and early May. The female wasps laid eggs just under the seed coat before endocarp hardening. The length of the wasp ovipositor was at least 5 mm, and hence, the diameters of fruits for oviposition would not exceed 2 cm. We observed up to five eggs per fruit, and the egg stage did not last for more than two days. Newly hatched larvae moved to the embryo, which is the first part that forms in a seed, and feeds on this. Larval competition occurs during this time; in this study, only one larva survived and matured. Thus, from the larva cycle of the wasp, most of the damaged fruits would have fallen by early June, before the harvest period.
Doses of Electron Beam and X-ray Irradiation for Inhibition of Development and Reproduction in Four Insect Pests
Yun, Seung-Hwan ; Kim, Minjun ; Kim, Hyunah ; Lee, Seon-Woo ; Yoo, Dae Hyun ; Kim, Hyun Kyung ; Koo, Hyun-Na ; Kim, Gil-Hah ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 391~398
DOI : 10.5656/KSAE.2014.10.0.054
This study investigated inhibitory doses of electron beam and X-ray irradiation by comparing their effects on the development and reproduction of four insect pests (Myzus persicae, Tetranychus urticae, Liriomyza trifolii, and Frankliniella intonsa). When M. persicae nymphs were irradiated with 100 Gy of electron beam and 30 Gy of X-ray beam, offspring production by adults that developed from the treated nymphs was completely inhibited. When M. persicae adults were irradiated with 200 Gy of electron beam and 50 Gy of X-ray beam, emergence of the
generation was inhibited. However, these two ionizing radiations did not affect adult longevity. When T. urticae eggs were irradiated with 150 Gy of electron beam and 50 Gy of X-ray beam, egg hatching was completely inhibited. When L. trifolii pupae were irradiated, the emergence rate decreased with increasing doses of X-ray irradiation. After F. intonsa adults were irradiated with 250 Gy of electron beam and 200 Gy of X-ray beam, egg hatching of the
generation was completely suppressed.
Four New Species of the Genus Pholcus (Araneae: Pholcidae) from Korea
Seo, Bo Keun ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 399~408
DOI : 10.5656/KSAE.2014.10.0.059
Four new species of Pholcus, Pholcus chiakensis n. sp., P. gajiensis n. sp., P. juwangensis n. sp. and P. palgongensis n. sp., are described and figured. The key for the new species, along with the seventeen species previously recorded from Korea, is also provided.
Effect of Tobacco Smoke on Controlling Aphids in Greenhouse
Park, Jong-Ho ; Hong, Sung-Jun ; Han, Eun-Jung ; Shim, Chang-Ki ; Kim, Min-Jeong ; Lee, Min-Ho ; Kim, Yong-Ki ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 409~413
DOI : 10.5656/KSAE.2014.10.0.023
This study was conducted to observe the effects of dried tobacco leaf smoke on controlling aphids in a laboratory and a greenhouse. Insecticidal activity of tobacco smoke against Aulacorthum solani in an acrylic cage was higher when a burley cultivar, rather a flue-cured cultivar, was used. Mortality of A. solani, Aphis gossypii, and Myzus persicae was 63.9%, 94.4%, and 97.2%, respectively, after 50mg of tobacco smoke on their host plants in an acrylic cage. Mortality of M. persicae after tobacco smoke was used was higher in eggplant than in Chinese cabbage. When 100 g and 200 g of flue-cured tobacco were smoked in a
greenhouse for 2 h, the control values against A. solani were 28.9% and 95.4%, respectively; the control value after 14 h of smoking was more than twice the value after 2 h of smoking. The control value against A. gossypii was more than 80% after tobacco smoke was used in a greenhouse in an organic cucumber farm. Tobacco smoke can be an effective control against aphid pests in greenhouses if an appropriate amount of tobacco and smoking time on the basis of the greenhouse conditions are used.
Species Dominance of Tetranychus urticae and Panonychus ulmi (Acari: Tetranychidae) in Apple Orchards in the Southern part of Korea
Choi, Kyung-Hee ; Lee, Dong-Hyuk ; Lee, Soon-Won ; Yoon, Changmann ; Lee, Sun-Young ; Do, Yun-Su ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 415~425
DOI : 10.5656/KSAE.2014.10.0.036
This study investigated population fluctuations in two mite species in apple orchards over 20-year period. The occurrence of two major mite pests infesting apple trees, two-spotted spider mite Tetranychus urticae and European red mite Panonychus ulmi (Acari: Tetranychidae), was investigated from 1992 to 2011 in major apple-producing districts, including four to eight cities, in the southern part of the Republic of Korea. The 20-year trend revealed that more orchards were infested by T. urticae from 1992 to 1999, but thereafter P. ulmi became dominant. The observed mean density of P. ulmi was consistent, whereas that of T. urticae fluctuated during this period. The analysis of occurrence in four time periods reveals that the density of T. urticae decreased after 2002. The monthly sampling, revealed that the density of P. ulmi was higher in April, whereas the density of T. urticae was higher from May to August. This change may be due to a change in the frequency of pesticide spraying, ground vegetation management, a decrease in nitrogen fertilization, and the overall orchard management practices. However, this projection should be examined in more detail. On the basis of the findings of this study, it can be concluded that cultural practices, including fertilization, and environmental changes, such as pesticide spray frequency and integrated pest management practices, affect species dominance and population densities of the two mite species in apple orchards.
Comparative Analysis of the Biological Characteristics of Ephedrus plagiator (Nees) and Aphidius ervi Haliday according to Different Aphid Hosts
Ji, Chang Woo ; Kang, Eun Jin ; Byeon, Young-Woong ; Kim, Jeong-Hwan ; Choi, Byeong Ryeol ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 427~433
DOI : 10.5656/KSAE.2014.10.0.056
To investigate the biological control of Aulacorthum solani, a comparative analysis was carried out using an indigenous natural enemy, Ephedrus plagiator, and an exotic parasitoid, Aphidius ervi. Lifespan, spawning periods, number of mummies, number of offspring, and developmental periods of the two parasitoids on Aulacorthum solani and Acyrthosiphon pisum were studied at 15, 20, 25, and
with a photoperiod 16 h (L): 8 h (D). The lifespan of E. plagiator (5.3 days) was relatively higher than that of A. ervi (2.3 days) when these parasitoids were reared on A. solani at
. Similarly, the spawning period of E. plagiator (5.3 days) was longer than that of A. ervi (2.2 days). When the two aphid parasitoids were provisioned with A. solani, the numbers of E. plagiator mummies at 15, 20, 25, and
were 71.5, 41, 15.7, and 7.7, respectively, whereas at the same temperatures, the numbers of A. ervi mummies were 22.1 16.3, 6.2, and 0.4, respectively. In contrast, when provision with A. pisum, the numbers of E. plagiator mummies at 15, 20, 25, and
were 70.3, 69.8, 34.3, and 8.4, whereas the numbers of A. ervi mummies were 93.4, 71.2, 34.8, and 14.5, respectively. The numbers of E. plagiator offspring emerging at 15, 20, 25, and
were 42.1, 36, 11.6, and 0, whereas the numbers of A. ervi offspring emerging were relatively lower at 19.6, 13.5, 3.7, and 0.1, respectively. By comparing these results, it can be concluded that E. plagiator is a more efficient parasitoid of A. solani, whereas A. ervi is more efficient on A. pisum.
Investigation of Trap Plants to Attract Bemisia tabaci (Hemiptera: Aleyrodidae)
Choi, Yong-Seok ; Kim, Kyu-Sang ; Jo, Hyo-Ryu ; Seo, Jeong-Hak ; Whang, In-Su ; Kim, Gyoung-Je ; Choe, Soo-Cheon ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 435~440
DOI : 10.5656/KSAE.2014.11.0.033
The number of Bemisia tabaci adults attracted to horseweed, thistle, red bean, cucumber, and tomato plants, as measured by the number stuck to yellow sticky traps, was investigated in a polyvinyl greenhouse for growing tomatoes using organic methods. The number was highest on cucumber plants in the early days of B. tabaci infestation, but was highest on horseweed overall. Of the eight species of beans tested, B. tabaci adults were most attracted to Ultari-Gangnang; however, beans were not effective trap plants for B. tabaci. Measurement of olfactory behavioral response using a four-choice olfactometer showed that B. tabaci adults preferred horseweed to cucumber, eggplant, or tomato. The developmental period of B. tabaci eggs and larvae was shorter at high temperature. At
, the developmental period of eggs and larvae on horseweed were reduced approximately 0.5 and 1 day, respectively, compared to those on cucumber or tomato.
Taxonomy of Languriinae Crotch (Coleoptera: Cucujoidea: Erotylidae) in Korea
Jung, Boo Hee ; Park, Haechul ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 441~448
DOI : 10.5656/KSAE.2014.11.0.050
We conducted taxonomic study of Languriinae in Korea. Nine species that belong to two genera of one tribe were identified in Korea. Two species, Anadastus ruficeps (Crotch) and Anadastus praetermissus (Janson), were recorded for the first time in Korea. Description, photographs of adults, illustrations of diagnostic characteristics, and a key have been provided.
Life Table Analysis of the Cabbage Aphide, Brevicoryne brassicae (Linnaeus) (Homoptera: Aphididae), on Tah Tsai Chinese Cabbages
Kim, So Hyung ; Kim, Kwang-Ho ; Hwang, Chang-Yeon ; Lim, Ju-Rak ; Kim, Kang-Hyeok ; Jeon, Sung-Wook ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 449~456
DOI : 10.5656/KSAE.2014.11.0.058
Life table analysis and temperature-dependent development experiments were conducted to understand the biological characteristics of the cabbage aphid, Brevicoryne brassicae (Linnaeus) on detached Tah Tsai Chinese cabbage (Brassica campestris var. narinosa) leaves at seven constant temperatures (15, 18, 21, 24, 27, 30 and
RH; 16L:8D). Mortality was lowest at
with 18% and 0% at
nymphal stages, respectively. The developmental period of
nymphal stage was 8.4 days at
, and it decreased with increasing temperature. The developmental period of the
nymphal stage was 6.7 days at
. The lower threshold temperature calculated using a linear model was
, and the effective accumulative temperature was 120.1DD. Adult longevity was 14.9 days at
, and total fecundity was observed 58.5 at
. According to the life table, the net reproduction rate was 47.5 at
, and the intrinsic rate of increase and the finite rate of increase were 0.36 and 1.43, respectively, at
. The doubling time was 1.95d at
, and mean generation time was 7.43d at
Toxicity of Several Insecticides Against Halyomorpha halys (Hemiptera: Pentatomidae) and Gymnosoma rotundatum (Diptera: Tachinidae)
Chung, Bu-Keun ; Lim, Eugene ; Lee, Heung-Su ; Park, Chung Gyoo ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 457~460
DOI : 10.5656/KSAE.2014.08.0.005
Toxicity of several insecticides was tested against the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae), and adult Gymnosoma rotundatum (Diptera: Tachinidae) in a sweet persimmon orchard. H. halys was captured using black light traps and G. rotundatum adults were collected using sticky traps lured with an aggregation pheromone, methyl-(E,E,Z)-2,4,6-decatrienoate of Plautia stali. Five insecticides, namely, bifenthrin 2 WP, buprofenzine+dinotefuran (20+15) WP, clothianidin 8 SC, dinotefuran 10 WP, and thiamethoxam 10 WP, were moderately toxic to G. rotundatum, resulting in 55.3% to 74.3% mortality. Bifenthrin 2 WP caused 93.1% mortality at 72 h within cages as a residual toxicity, and others caused varied mortalities.
A new Noctuid pests, Protegira songi Chen & Zhang (Lepidoptera, Noctuidae, Hadeninae) Attacking to Eucommia ulmoides Oliv. in Korea
Byun, Bong-Kyu ; Han, Huilin ; Jeon, Jun Hyoung ; Kim, Young-Jae ; Cho, Sung-Jong ; Koh, Sang-Hyun ; Park, Jae-Ho ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 461~464
DOI : 10.5656/KSAE.2014.08.0.028
As a result of investigation on the larvae attacking leaves of Eucommia ulmoides Oliv. and causing serious damage on the plant in Seoul, Chungnam and Jeonbuk Province in Korea during summer in 2013, Protegira songi Chen & Zhang of the family Noctuidae was identified. In this study, we report the host plants of it for the first time from Korea, with larval damage and taxonomic information by illustrating the characteristics of male and female genitalia.
A Report on Mixed Occurrence of Tobacco Whitefly (Bemisia tabaci) Biotypes B and Q in Oriental Melon Farms in Kyungpook Province, Korea
Kim, Eunsung ; Kim, Yonggyun ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 465~472
DOI : 10.5656/KSAE.2014.09.0.038
The tobacco whitefly, Bemisia tabaci, infest the Oriental melon and give significant economic damage along with its virus-vectoring activity. Various biotypes of B. tabaci have been well known and are classified depending on the severity of crop damage and insecticide susceptibility. In this study, B. tabaci adults were collected in the melon fields located in Poongchun-myeon, Andong, Korea and diagnosed on their biotypes using PCR molecular markers. From the all the 11 greenhouses, B. tabaci biotype Q was identified. In addition, biotype B adults were also found from the 4 greenhouses. These results report the first occurrence of B. tabaci at the Oriental melon farms in Gyeongbuk province with mixed infection by the two biotypes in the area.
Evaluation of Apple and Orange Fruits as Food Sources for the Development of Halyomorpha halys (Hemiptera: Pentatomidae)
Mainali, Bishwo Prasad ; Kim, Hyun-Ju ; Yoon, Young-Nam ; Oh, In-Seok ; Bae, Soon-Do ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 473~477
DOI : 10.5656/KSAE.2014.09.0.040
Halyomorpha halys (St
l) (Hemiptera: Pentatomidae) is a typical polyphagous stink bug causing losses in several host plants including leguminous crops and fruits. Nutritional status of fruits such as apple and orange for the development of H. halys is not yet clear. We evaluated fruits of apple and orange with or without soybean-peanuts as food sources to investigate development, mortality and fecundity of the stink bug in a controlled condition. Those only fed on water could not develop into third instars. H. halys could not develop into fourth instar on apple only food. However, on an orange only food, 14% of H. halys emerged as adults. Those fed on orange only food had the longest development period (74.2 d). Total mortality of those fed on foods consisting of soybean-peanut ranged from 38 to 44%. In an average a female laid 169~190 eggs in a lifetime and those eggs had 81~83% hatchability. Results indicated that the apple fruit as a solo food source is an incomplete food for H. halys development while orange could support development of only few of the bugs.
A Report on the Control Effects of Automatic Dry Fog Sprayer on Aphids in Greenhouse Crops
Kang, Taek-Jun ; Kim, Se-Jin ; Kim, Dong-Hwan ; Yang, Chang Yeol ; Kim, Hyeong-Hwan ; Cho, Myoung-Rae ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 479~483
DOI : 10.5656/KSAE.2014.11.0.057
The area of greenhouse horticulture has increased dramatically since the early 1990s in Korea. However, area per farmer still very small and diverse pest species occurs in greenhouse abundantly because of its protected condition. To manage pests, farmers use many pesticides frequently. Incessant and improper use of chemicals provoked pesticide resistance in pest and poisoning of farmers. In this study, we investigated the efficiencies of automatic dry fog sprayer for controlling two aphid species, Aphis gossypii and Myzus persicae, in greenhouse horticulture. When doors and side windows were completely closed in automatic dry fog sprayer treatment greenhouse, aphids were controlled similar level with conventional spraying method (percent control: 61.0~94.1%). However, when half of the doors and side windows of the greenhouse were opened, aphids were controlled poorly (percent control: 36.0~54.4%).
Occurrence and Damage by Thrips on Greenhouse-Cultivated Fig
Kim, Dong-Hwan ; Cho, Myoung-Rae ; Yang, Chang-Yeol ; Kang, Taek-Jun ; Kim, Hyeong-Hwan ; Jeon, Sung-Wook ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 485~490
DOI : 10.5656/KSAE.2014.11.0.048
This study was conducted to assess the occurrence and damages by thrips on greenhouse-cultivated fig in Hwaseong, Gyeonggi Province, Korea. We identified the collected species as Thrips tabaci Lindeman, Frankliniella occidentalis Pergande, and F. intonsa Trybom. The density of thrips in the greenhouses during the summer months was monitored using yellow sticky traps; T. tabaci showed the highest density, followed by F. occidentalis and F. intonsa. The damages by thrips were characterized by stunted plant growth because of delayed discoloration of the pericarp, and development of rough fruit surface. Stereomicroscopic observation on the fruit flesh revealed the growth of gray mold at the damaged area, as well as the dead bodies and exuviae of thrips. The rates of fig fruit damages per month, were 18.2%, 9.7%, 2.9%, and 1.3% in July, August, September, and October, respectively.
Report on Tyrophagus neiswanderi (Acari: Acaridae) as a Pest of Greenhouse Cucumber in Korea
Hwan Kim, Hyeong ; Kim, Dong Hwan ; Yang, Chang Yeol ; Kang, Taek Jun ; Jung, Jae A ; Lee, Jong Ho ; Jeon, Seong-Uk ; Song, Jin Sun ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 491~495
DOI : 10.5656/KSAE.2014.11.0.061
Mites were collected from organic cultivations of greenhouse cucumbers and identified as Tyrophagus neiswanderi (Acari: caridae). T. neiswanderi (length,
) is a very small, milky-white, and egg-shaped mite, and it mainly causes damage to the leaves, flowers, and fruits of cucumber plants. In the early growing season of cucumbers, the shoots of seedlings became pale and yellow because of T. neiswanderi, and eventually shrinkage or bud-failing was observed in the plants. In the middle of the growing season, T. neiswanderi caused white spots on the leaves and flowers of the plants, and the spots gradually became holes. T. neiswanderi also caused severe damage to young fruits by feeding on the rinds of the fruits, inducing malformations and lowering the economic value.
Wing Morphs and Parasitism Rates of the Small Brown Planthopper, Laodelphax striatellus (Hemiptera: Delphacidae) in Korea
Son, Byung-In ; Jung, Jong-Kook ; Lee, Joon-Ho ;
Korean journal of applied entomology, volume 53, issue 4, 2014, Pages 497~501
DOI : 10.5656/KSAE.2014.11.0.064
The small brown planthopper, Laodelphax striatellus (Fall
n) (SBPH) is one of the important rice pests in Korea, which transmits rice stripe virus (RSV) to rice. This pest is an indigenous species in Korea and has also known to migrate from China to the western coastal areas of Korea. This study was conducted to investigate the wing morphs of SBPH and its parasitism rate of Haplogonatopus atratus Esaki et Hashimoto in Korea. In 2014, SBPH were collected in April and July from 16 sites throughout South Korea and their wing morphs and parasitism rates were measured under the microscope. Percentage of brachypterous male in July was significantly declined compared to that in April, while that of brachypterous female did not change. A positive relationship was found between latitude and percentage of brachypterous adults in April. Parasitism rate of both nymphs and adults were higher in April than July. In addition, nymphal parasitism rate was generally higher in western coastal areas.