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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 41, Issue 4 - Dec 2002
Volume 41, Issue 3 - Sep 2002
Volume 41, Issue 2 - Jun 2002
Volume 41, Issue 1 - Mar 2002
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Seasonal Occurrence Trends of Hemipteran Bug Pests Monitored by Mercury Light and Aggregation Pheromone Traps in Sweet Persimmon Orchards
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 233~238
The seasonal occurrence trends of the brown-winged green bug, Plautia stali, and the brown malmorated stink bug, Halyomorpha halys, were monitored in sweet persimmon orchards in southern region of Korea using light traps (in 2000 and 2001), and aggregation pheromone traps (methyl (E, E, Z)-2 ,4, 6-decatrienoate)) of P. stali (in 2001). Light trap data showed that H. halys started to occur from the end of June, and reached its peak in early or mid August, while P. stali was mostly attracted to the traps from mid July to late August without any distinct attraction peak. Both species did not occur after September in the persimmon orchards studied. The attraction patterns of both species to aggregation pheromone traps were different from those observed in light traps. Both species were attracted to the pheromone traps from mid May to late August. The peak occurrence of H. halys could not be detected due to low catches. However, the period of peak attraction for P. stali was from late June to late August depending on the geographical locations. The aggregation pheromone traps of P. stali attracted more number of P stali than H. hails, but the light traps showed a reverse pattern. In both species, more females were attracted to the aggregation pheromone traps than males. The difference of attraction patterns between 2 types of traps was discussed in relation to content of soluble tannin in persimmon fruits.
Facilitating Effects of Helpers on Oviposition and Colony Development of Bumblebee Queen, Bombus ignitus
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 239~245
It was investigated whether or not such helpers as worker bee, bee-cocoon and egg-cup etc, have any effects on oviposition and colony foundation of the bumblebee queen, Bombus ignitus. Among the helpers tested, the callow workers of B. ignitus and B. terrestris showed the most remarkable effects on the oviposition rates to 92% and 88%, respectively. The live cocoon as a helper improved oviposition rate over 60%. A narcotized old worker 10-20 days-aged after emergence, showed similar effects to a callow worker on the colony development such as oviposition rate, colony foundation and progeny-queen production. On the other hand, dried cocoon, callow honeybee worker or egg-cup did not show a positive effect as a helper. In the number of workers recruited to a foundation queen, two workers showed better effect than one worker on the colony development, with no difference between two and more.
Yearly Fluctuation of Migrated Aphids and PLRV Transmission Rate at Daegwallyeong Highland Region in Korea
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 247~253
Based on accumulated data during 1977-2001, seasonal fluctuations of migrated aphids at Daegwallyeong highlands were analyzed. In addition, rates of PLRV transmission by migrated aphids were investigated by inoculation on indicator plant, Physazis floridana, and ELISA in 2000-2001, and the change of PLRV transmission rates by aphids was compared with that of 1989-1991. The average migrated aphid population densities in 1976-1980, 1991-1995, and 1996-2000 were 575.2, 2959.4 and 2281.6, respectively, showing gradual increase in recent years. The average peak time of aphid migration was from early to mid June during 1977-2001, showing any significant differences over the years. The dominant species, however, changed slowly; before mid 1980s M. persicae flied dominantly, but after mid 1980s Aphis gossypii did. Hahm et al. (1991) reported that PLRV transmission rate of migrated aphids during 1989-1991 was 6.7-10.0%. In 2000-2001, however, migrated aphids at Daegwallyeong highland showed 10.1-11.0%. Although present PLRV transmission rate was slightly higher than that of 10 years ago, taking increased population densities and diversity of migrated aphids into account, there was no significant change of PLRV transmission rate over the years.
Morphology, Biology and Chemical Control of Tomato Russet mite, Aculops lycopersici Massee (Acari: Eriophyidae) in Korea
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 255~261
Tomato russet mite, Aculops lycopersici Massee (Acari. Eriophyidae) was recorded in Korea and their SEM observations, distribution, host range, development on different temperature, and chemical control method were studied. Tomato russet mite is a microscopic animal (134.9
) with 2 pairs of legs which had 4 rays of feathered craw. Infected leaf turn reddish brown, stem loss hair, become shiny or surface cross-cracked, and shoot wilted or shrunk. Surface of fruit around fruit stalk appeared rusted or cross-cracked. It was found in glass greenhouse at Buyeo and Yuseong in Chungnam Province, Pyeongchang in Gangwon Province, and Chilgok and Guryongpo in Gyeongbuk Province. Convolvulus, black nightshade, chinese lanternplant, eggp1ant, morning glory, petunia, potato, pepper, tobacco and tomato were confirmed as a host plant in inoculation test. It could develop at temperature around
, it took 6-11 days from eggs to adult, higher temperature shorten its life cycle. Female lived longer than male and it lived as long as 12 days at 25-28"C. Among acaricides tested, fenazaquin and cypermethrin were most effective.tive.
Distribution and Collection of Osmia Bees in the Mountain Areas of Korea
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 263~267
A faunistic survey was conducted to find Osmia bees to be used as an effective pollinator in apple orchards. Collections were carried out from more than 50 selected sites in mountainous areas throughout Korea for 3 years (1996-98) with providing bundle of bamboo traps (6-8 mm of inner diameter) as Osmia nesting site. Five species of Osmia ：O. cornifrons (Radoszkowsky), O. pedicornis Cockerell, O. taurus Smith, O. satoi Yasumatsu et Hirashima and O. jacotti Cockerell, were collected at the rates of 39.9-51.7, 28.3-53.7, 5.5-19.1, 0.8-0.9 and 0.0-0.1%, respectively. And O. cornifrons and O. pedicornis were the dominants with over 80% of total Osmia collected through the collections. Out of those bees collected, rates of female were 29-43% for O. cornifrons. 10-12% for O. pedicornis and 22-43% for O. taurus. When the collection sites of the dominant 3 species were grouped in relation to altitudes above the sea level, about 50% or more bees were collected form the higher sites (500m or higher) while 20% or less were from the lower sites (200m or lower). When the bamboo traps were placed at the same sites continuously for 3 years, number of O. cornrfrons and O. taurus collected was slightly increased while that of O. pedicornis was drastically decreased year after year. Nesting by Osmia bees seems to have started at around early April, peaked at early May and ended by Mid June, while nest competing species of Sphecidae and Eumenidae started nesting at around early June, peaked at early July and ended by the Mid August.
Effects of Temperature and Nematode Concentration on Pathogenicity and Reproduction of Entomopathogenic Nematode, Steinernema carpocapsae Pocheon Strain (Nematoda: Steinernematidae)
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 269~277
Ecological studies on entomopathogenic nematodes are required to increase control efficacy against target insect pests and to obtain basic information for mass production. Thus, effect of temperature and nematode concentration on infectivity and reproduction of Steinernema carpocapsae Pocheon and that of exposure time and soil depth on infectivity were examined using Galleria mellonella larvae. Infectivity and reproduction were examined at five temperatures, 13, 18, 24, 30 and 35
with seven concentrations, 0, 5, 10, 20, 40, 80 and 160 infective juveniles (IJs)/larva. Temperature and nematode concentration influenced infectivity and reproduction of S. carpocapsae Pocheon. Although G. mellonella larvae were killed by S. carpocapsae Pocheon at all given temperatures and nematode concentrations, mortality was higher at 24
than other temperatures. Lethal time of G. mellonella by S. carpocapsae Pocheon was shorter with increasing temperature and nematode concentrations. S. carpocapsae Pocheon was not established in G. mellonella at 13 and
. Time for the first emergence from G. mellonella cadaver was longer
(about 20 days) than 24 and
(about 5 days). The highest number of progenies was obtained at
with 80IJs/1arva, i.e., $18.8
10^4$IJs were produced from a larva. In the exposure time assay, G. mellonella death was recorded in 10 minutes when 300 IJs were inoculated per larva. When S. carpocapsae Pocheon was inoculated at the rate of
IJs/ha to G. mellonella at the depth of 0, 2, 5 and 10 cm of sand columns, 100% mortality and similar sex ratio were observed but number of established IJs in cadaver was decreased with deepening the soil depth. The results indicated that optimum temperature for infectivity and reproduction of S. carpocapsae Pocheon was
In addition, S. carpocapsae Pocheon was effective to target insects within 5 cm from the soil surface.
Identification of a Pathogenic Bacterium, Staphylococcus gallinarum, to Bombyx mori
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 279~284
Flacherie symptom was found in the fifth instar larvae of silkworm, Bombyx mori. The bacterial pathogen was isolated from the hemolymph of the infected silkworm and identified. The isolated bacteria caused a significant flacherie pathogenicity to the fifth instar larvae of B. mori when
cfu (colony-forming unit) of the bacteria was injected into each larva. The infected larvae began to die at 6 days after injection and resulted in complete mortality at 10 days. The bacterium was identified as Staphylococcus gallinarum based on the morphological and physiological characteristics described in Bergey's manual. This identification was further supported by the characters of carbohydrate utility analyzed from a bacterial identification system (
) and also by the molecular structure of 165-23S rDNA internal transcribed spaces. As an insecticidal action, S. gallinarum caused hemolymph septicemia by its cytotoxic effect on the hemocytes of B. mori.
Insecticidal Activity and Ovipositional Repellency of Monoterpenoids against Moechotypa diphysis Adults (Coleoptera: Cerambycidae)
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 285~292
These studies were carried out to investigate the fumigant toxicity, the contact toxicity and the ovipositional repellency of 25 monoterpenoids against oak longicorn beetle adults, Moechotypa diphysis. Monoterpenoids with 100% of fumigant toxicity were 1, 8-cinehone, fenchone, pulegone and (equation omitted)-terpinene at 20 (equation omitted)/954 ml (air) concentration, pulegone and (equation omitted)-terpinen at 10 (equation omitted)/954 ml (air) concentration, pulegone at 5 (equation omitted)/954 ml (air) concentration. Most monoterpenoids showed low or no contact toxicity but only pulegone showed about 70% mortality. Some monoterpenoids which had repellency to female adults with Y-tube olfactometer were bornylacetate, carvacrol, 1, 8-cineole and menthol at 1 (equation omitted) dose, while citronellol showed attractant response. Carveol, geraniol and perillyl alcohol of 25 monoterpenoids showed ovipoistional repellency of 82.1%, 78.3%, 87.5%, respectively, at the concentration of 1,000 ppm in the laboratory condition. In the field, the result tested with three monoterpenoids indicated that geraniol was the most effective one at the concentration of 10,000ppm and 1,000 ppm, but residual effect wasn't found.
Effects of Treatment Time of Cadusafos and Fosthiazate for the Control of Meloidogyne arenaria on Oriental Melon
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 293~298
Cadusafos and fosthiazate were applied at the rate of 1.8 g a.i./6
as pre-plant or pre-plant＋post-plant treatments on winter-grown oriental melon in a greenhouse soil infested with Meloidogyne arenaria. Nematicides reduced root-knot nematode population from 35 to 90% compared with control； fosthiazate was better than cadusafos (P ＝ 0.003) and fosthiazate pre-plant＋post-plant application reduced nematode population densities as much as 90%. Nematicides increased yield in an average of 23% (11-38%) in May, 39% (2-65%) in June, and 31% (12-46%) for the total (P ＝ 0.085). The residue in the fruit of oriental melon by post-plant treatment of fosthiazate exceeded maximum residue limit of 0.2ppm, while the Cadusafos residue was below the limit. It is concluded that fosthiazate cannot be used as a post-plant treatment in winer-grown oriental melon with overall consideration, i. e., danger of residue, value of melon, costs of nematicide, consumer demand on safer agricultural products, and effects of fallow.
An Unrecorded Species of Pratylenchus Ioosi Loof (Tylenchida: Pratylenchidae) from Tea in Korea
Park, Byeong-Yong ; Park, Dong-Ro ; Lee, Jae-Kook ; Park, Young-Eoun ; Shin, Gil-Ho ;
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 299~303
Pratylenchus loosi Loof, 1960 is recorded for the first time from Korea. The nematode was isolated from the roots of tea (Thea sinensis L.) and soil around the roots from Yeongam-gun, Jeo-llanam-do and Namjeju-gun, Jeju-do, Korea. This species has two lip annuli. The female is 433-646
long: a＝ 29.1-37.5, b ＝ 5.1-6.4, c ＝ 15.0-21.3, vulva(%) ＝ 73.0-85.4. The male body length is 408-512
long: a＝36.1-40.0, b＝4.8-6.7, c ＝17.0-19.0, and spicule ＝ 14.1-18.0
. The stylet is 11.6-18.0
long and the number of incisures is four. The shape of spermatheca filled with sperm is broadly rounded, oval and quadrangular The shape of tail is narrowly round to subacute.
Taxonomic Reconsideration of Eriococcidae (Sternorrhyncha) Occurring on the Persimmon Tree, Diospyros kakl Thunb.
Korean journal of applied entomology, volume 41, issue 4, 2002, Pages 305~311
Asiacornococcus kaki (Kuwana) known as a serious pest on Diospyros kaki Thunb. has been reported erroneously as Eriococcus lagerstroemiae Kuwana. These two species were redescribed and illustrated for correct identification by the morphological characters of adult females with known host plants. Asiacornococcus Tang & Hao is a newly known genus from the Korean Peninsula.