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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
Editor in Chief :
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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Development of a Hypertext-based Polychotomous Key for the Identification of Planthoppers Caught by Light Trap in Paddy Fields
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 75~83
The hypertext-based polychotomous key in m (World Wide Web) was developed to improve the identification accuracy of planthoppers caught by the light trap in Korean paddy fields. The effects of it were tested by 12 students who are not familiar at the identification of insects. When they used the hypertext, it was improved that the ability of them to recognize Sogatella furcifera (Horvath) and Laodelphax striatellus (Fallen). Identification accuracy of the former was increased significantly from 56% to 83% and that of the latter was also increased significantly from 47% to 80%. However, many students still have difficulty in the recognition of Nilaparvata lugens (Stal).
Effect of Diets on Development and Reproduction of Rice Armyworm, Pseudaletia separata (Lepidoptera: Noctuidae)
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 85~89
Development and reproduction of the rice armyworm, Pseudaletia separara, were investigated on different diets (corn leaf, rice leaf, Chinese cabbage leaf, cabbage leaf, sweetpotato leaf, soybean leaf and silkworm artificial diet). Egg and pupal periods were not different among the diets. But larval periods showed significant difference among diets. Developmental period from egg to adult was shortest as 32.5 d on corn leaf and longest as 46.6 d on soybean leaf. At 16 days after hatching, larval weights on rice and silkworm artificial diet were heavier than those on other diets. The larvae reared on cabbage leaf and sweetpotato leaf failed to pupate. Survival rates from larva to adult were highest (70.6%) on com leaf lowest (39.8%) on soybean leaf. The longevity of female adults was not affected by the larval diets. Female adults showed higher fecundity when the larvae were fed with corn leaf, rice leaf and silkworm artificial diet than other diets. Net reproduction rate (R
) was highest as 1218.5 on silkworm artificial diet. The intrinsic rate of natural increase (R
) ranged from 0.115 to 0.175, and was maximum on com leaf.
Effects of Temperature and Food on the Nymphal Development and Adult Longevity of the Green Mirid Bug, Cyrtorhinus lividipennis Router (Hemiptera: Miridae) and Its Egg Predation
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 91~97
This study was conducted to determine the effects of temperature and food onthe nymphal development and adult longevity of the green virid bug, Cyrtorhinus lividipennis Router. Nymphal period was 13.2 to 13.7 days at 24
, 10.4 to 10.9 days at 28
, and 9.0 to 9.3 days at 32
. Number of eggs predated by nymph was 10.6-14.3 at 24
, 7.5-9.2 at 28
, and 5.8-7.5 at 32
. Amount of predation was highest on BPH, followed by SBPH, WBPH, and GLH. Number of nympal moulting was mostly four times (55-75%) followed by three times (25-45%), regardless of temperature and food. Percent emergence rate was 52-70%, 48-66% and 22-38% at 24
, respectively, showing a tendency to decrease with increasing temperature, and was affected by foods. Adult longevity, when supplied with one food, was 19.8 to 22.5 days at 24
, 15.6 to 17.0 days at 28
, and 10.3 to 11.7 days at 32
. There was no significant difference among foods in terms of adult longevity, but it tended to be slightly longer when provided with four foods than with one food. Number of eggs predated by an adult, when supplied with one food, was 35.7-54.2, 31.6-44.6 and 18.1-28.2 at 24
, respectively. It was highest on BPH, followed by SBPH, WBPH and GLH regardless of temperature. Number of egg Predated by an adult, when supplied with four foods, was 4.0-28.9, 2.9-29.0 and 17-13.6 at 24
, respectively, and was significantly different among foods supplied. The results suggest that the significantly different predation amount by adult was due to food preference amoung the different foods.
Biological Characteristics of Tetrastichus sp. reared on Artificial Host
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 99~105
A gregarious pupal endoparasitoid Tetrastichsus sp. (Hymenoptera: Eulophidae) was reared in vitro from oviposition to adult emergence on an artificial host. The host pupal case was made using 0.02 mm-thick polypropylene film, and was filled with a diet consisting of powders of Antheraea pernyi pupa, chicken yolk, infant formula, royal jelly, and Neisenheimer's salt solution. Female parasitoids reared in the artificial host produced smaller sized progeny than those reared in in vivo, but the adults reproduced fertile offsprings. Furthermore in vitro second-generation (G
) females showed more improved biological characteristics, compared with their parents. The fecundity (mean no. adult progeny), oviposition period (days), and longevity (days) of G
female were evaluated as 45.7, 7.8, and 13.8, respectively Female biased sex ratio was obtained with 76.9% female progeny. The results demonstrated that Tetrastichus sp. is a promising parasitoid for in vitro mass production.
Seasonal Occurrence Pattern of Peach Pyralid Moth, Oichocrosis punctiferalis, in Fuyu Persimmon Orchards and Fruit Damage at Harvesting Time
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 107~112
Seasonal occurrence pattern of the peach pyramid moth (PPM), Dichocrosis punctfferahs, was studied by sex pheromone traps and mercury light traps in several Fuyu persimmon orchards under different control pressures in southern region of Korea in 2000 and 2001. Fruit damage by the larvae was also checked at harvesting time from 1999 to 2001. The pattern showed 3 distinct peaks; the 1st one in mid to late June, the 2nd one in mid to late August, and the 3rd one in late September. Number of PPM catches was higher in less controlled than in intensively controlled orchards. There were no persimmon fruits damaged by the larvae of PPM and persimmon fruit moth, Stathmopoda masinissa, in our samples from the testing orchards at harvesting time. Therefore, it is unlikely that these two quarantine pests are included in the exporting fruits. Considering flora adjacent to the tested orchards and zero levels of fruit damage by the larvae, there is a strong possibility that the moths flew from neighbouring chestnut trees or other host plants to be attracted to the traps in the persimmon orchards.
Changes in the Fitness of Brown Planthopper, Nilapawata lugens Stal (Homoptera: Delphacidae) to Several Resistant Rice Varieties after Multi-generational Selection
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 113~121
This study investigated the changes in the fitness of brown planthopper, NilapaHata lugens, to several rice varieties with different resistance background, after multi-generational selection on a resistant rice variety. A susceptible strain of brown planthopper (Dongjin-5) had been reared on the Chungchungbyeo with Bph1 resistance gene for three generations (Chungchung-G3) and six generations (Chungchung-G6), then the fitness change was evaluated by measuring their longevity, fecundity, preferences, and survivorships on the varieties with various background of resistance. After being selected three to six generations on Chungchungbyeo, feeding preference, adult longevity, and fecundity increased, where as nymphal period reduced when they were reared on various varieties with Bph1 gene. The egg Periods were not much different among the varieties fed on, except for the Chungchung-G6 on the rice varieties of Milyang63 (bph2 gene) and Gayabyeo (Bph1+bph2 gene). These results suggest that the susecptible Donajin-5 (Biotype-1) can be easily converted to a resistant biotype-2 capable of overcoming the resistant varieties with Bph 1 gene.
Effect of Temperature on Reproduction and Development of Rice Water Weevil, Lissorhoptrus oryzophilus (Coleoptera: Curculionidae)
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 123~128
This study was carried out to test the effects of temperatures between 2
on the reproduction and development of the rice water weevil, Lissorhoptrus oryzophilus. Preoviposition periods were much longer (17.2 to 51.0 days) in the overwintering adult females collected in March than those collected in May, regardless of temperature. Oviposition periods, however, were longer (16.9 to 22.0 days) in the adult females collected in May than those collected in March at the same temperatures. The longer oviposition period observed in the females collected in May were directly associated with higher fecundity. Egg periods were shortened from as temperature increased, but the hatching rate was highest (100%) at 27
. The developmental periods from egg to adult were shortened as temperature increased : from 77.9 days at 2
to 38.3 days at 3
. The developmental zero point temperature (T) and the total effect temperature (K) for egg were 16.3
and 62.1 dgree days, respectively. The T and K from egg to adult emergence were 13.9
and 577.6 dgree days, respectively. The adult females of the first generation did not oviposit at 2
, but did at
. The intrinsic rate of natural increase (r
) increased as temperature augmented. Net reproductive rate (Ro) per generation was highest (75.3) at
Distribution of Agamermis unka (Nematoda: Mermithidae), a Mermithid Parasite of Brown Planthopper (Nilapawata lugens) in Korean Rice Paddies
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 129~136
Agamermis unka, a mermithid parasite of brown planthopper (BPH), Nilaparvata lugens, is the most important natural enemy of BPH and white-backed planthopper (WBPH), Sogatella furcifera in Korea. Distribution of A. unka was investigated in Korean rice fields from 1992 to 1998 and in 2001. Overwintering population of A. unka in Gosung, Namhae, and Tongyoung from 1992 to 1998 was different depending on locality and year. In the survey of A. tanka distribution in the spring of 2001, A. unka was found only at Jangheung and Haenam in Jeonnam province and Namhae, Jinju, Sancheong, Sacheon, Gosung, Tongyoung, Uiryeong, Changwon, Gimhae, and the experimental field of Gyeongsangnamdo Agricultural Research and Extension Services at Jinju in Gyeongnam province out of 30 observed regions in 5 provinces. The number of A. unka was 1,045/㎥ at Namhae, 947/㎥ at the experimental field of Gyeongsangnamdo Agricultural Research and Extension Services, and 395/㎥ at Gosung. Density of A. unka at the rice paddies of Gyeongnam province after harvest in 2001 was higher at the rice fields of Namhae, Gosung, and the experimental field of Gyeongsangnamdo Agricultural Research and Extension Services. Although density of A. unka was higher in the pesticide-untreated plots than fungicide-treated or insecticide-treated plots of forecasting paddies, there were no significant differences. After rice harvest A. unka was found from the forecasting paddies of Gosung, Jinju, Namhae and Sacheon out of 19 observed localities in Gyeongnam province.
Chemical Control of Grape Phylloxera, Daktulosphaira vitifoliae (Homoptera: Phylloxeridae) and Its Damage in Grapevine Yards
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 137~143
Grape phylloxera, Daktulosphaira vitifoliae(Fitch), is a destructive grape insect pest because it forms root galls and kills the plant by directly destroying root system. The effects of insecticide treatments were examined to establish the chemical control system of phylloxera, and the damage by this insect was investigated in grapevine yards. The treatments of 40kg carbofuran 3GR per ha and carbosulfan 20WP of 10
) per tree successfully reduced phylloxera densities. After the insecticide treatments in early season, the phylloxera population rebuilt up again at harvest season. In a grapevine yard where two times of carbofuran treatment (mid-May and post-harvest treatment) were applied a year from 1998 to 2000, total yield per ha in 2000 showed an increase of 30% over that of 1998. But the yield in 2000 was low 20% compared to the average standard yield of Korean grapevine yards. In a grapevine yard without chemical treatment during the same years, total yield per ha in 2000 showed 53% reduction compared to that of 1998. Also, damaged vines by phylloxera abruptly increased from 3% in 1998 to 50% in 2000.
Notes on Exotic Species, Ophraella communa Lesage (Coleoptera: Chrysomeridae) in Korea
Korean journal of applied entomology, volume 41, issue 2, 2002, Pages 145~150
An exotic Chrysomelid species, Ophraella communa Lesage, which is originally distributed in North America and recently discovered in Korea, is reviewed with its morphological characteristics from egg to adult, brief biological notes, local distribution, and dispersal prospect in Korea.