Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean journal of applied entomology
Journal Basic Information
Journal DOI :
Korean Society of Applied Entomology
Editor in Chief :
Volume & Issues
Volume 25, Issue 4 - Dec 1986
Volume 25, Issue 3 - Nov 1986
Volume 25, Issue 2 - Jul 1986
Volume 25, Issue 1 - Apr 1986
Volume 24, Issue 4 - Jan 1986
Selecting the target year
Studies on the Major Factors Affecting the Population of the Overwintered Pine Needle Gall Midge, Thecodiplosis japonensis Uchida et Inouye
Chung, Yeong-Jin ; Hyun, Jai-Sun ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 1~9
Periodical samplings were made in the fields, located Hwasong-Gun, Banwal-Myon, Doondai-Ri, for two years to study the major factors responsible to the population of the overwintered pine needle gall midge, Thecodiplosis japonensis Uchida et Inouye. The population densities of the overwintered larvae reduced greatly at the time of pupation and the changing patterns seemed to be influenced by environmental conditions. The estimated 50% pupation day was about two weeks earlier for the 1980 generation compared with the 1979 generation, and much higher average and the daily maximum temperatures in 1981 affected on the development of the larvae. The relative emergence rates were 14.1% for 1979 and 14.9% for 1980 generation. The relative emergence rates(Y) were affected by the moisture contents of soil (
) and its variance
. The relative emergence rates seemed to be decreased with the increased variance of the moisture contents of soil. Percents of needle gall were 49.63% for 1980 and 86.87% for 1981 generation.
Local Differences in Post-diapause Developmental Period of Striped Rice Borer; Chilo suppressalis(Walker), (Lepidoptera: pyralidae)
Uhm, K.B. ; Lee, J.O. ; Cho, E.J. ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 11~16
Local difference in post-overwinter developmental periods was investigated by incubating the overwintered larvae collected from 8 locations at
begining January 15 and February 15. Based on the 2nd incubation test, it was found that Chunseong colony had the shortest pre pupal period of 17.9 days, while Gwangsan colony had the longest 27.7 days. In general, prepupal period showed negative correlation with latitudes. Average pupal periods were not significantly different among colonies. Adult emergence period showed the same trend as prepupal periods. Chunseong and Pyeongtaeg colonies emerged faster than the other colonies and showed a single peak of adult emergence, while Nonsan, Iri, Gwangsan colony showed several peaks of adult emergence.
Progress of Rice Injury Caused by the First Generation of Striped Rice Borer(Chilo suppressalis(Walker)) (Lepidoptera: pyralidae)
Ryoo, Mun-Il ; Lee, Moon-Hong ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 17~20
Based on the data of rice injury caused by the first generation of striped rice borer(Chilo suppressalis (Walker)), which were collected in the three years from 1974 to 1976 in Sweon area, progress of the injury in relation to Degree Days was studied. Increase in the number of infested stems was strongly related to the dispersal features of larvae. The increase ceased at about 400 DD after modal emergence date when the larval distribution pattern became stable. The regression of the number of infested stems per infested hill on Degree Days was significant and the coefficients of determaination were 0.84 and 0.95 for 1974 and 1976, respectively. The regression coefficients in the two years were not statistically significant, suggesting a possibility for pre- diction of the mean number of infested stems per infested hill through a simple model.
Relationship between the Occurrence of Small Brown Planthopper, Laodelphax striatellus (Fallen) (Homoptera : Delphacidae) and Barley Maturity
Kim, H.S. ; Lee, J.O. ; Uhm, K.B. ; Park, J.S. ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 21~25
Number of small brown planthoppers, Laodelphax striatellus(F.) negatively correlated with the mean temperature of March in Korea. The low temperature of March delayed the barley growth, heading date, and maturity. Thereby, was small brown planthopper was given a good condition to feed barley, and caused abundant occurence in 1984. In addition, it was possible to predict the occurence ot small brown planthopper by quadractice equations.
Studies on Rice Varietal Resistance to Rice Stem Maggot, Chlorops oryzae Matsumura
Choi, K.M. ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 27~32
To establish a method for measuring varietal resistance against rice stem maggot in field and pot, 20 varieties were used in
. The degree of injured stems by the 1st generation larvae was significantly correlated with that of injured panicles by the 2nd (
). There was no ovipositional preference in rice stem maggot. The larval mortality after artificial infestation varied widly from 5.6 to 100% in varieties and that of the resistant varieties was high after boring. There was a negative correlation between number of injured leaves and larval mortality after artificial infestation (
). It is considered that larval mortality mainly caused by antibiosis and larval mortality 20 days after infestation on rice seedlings is ideal for evaluating the varietal resistance to rice stem maggot. Resistant varieties are Nagdongbyeo, Jinjubyeo and Chucheongbyeo susceptible varieties, Keumgangbyeo, Milyang 23, Baigyangbyeo and Milyang 30.
Morphological Characteristics of the Oriental Tobacco Budworm (Heliothis assulta) and the Corn earworm (H armigera)
Hwang, Chang-Yun ; Park, Kyu-Tek ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 33~35
To discriminate features of H. assulta and H. armigera, this study was done in 1983. There is 7 spots on the forewing of H. armigera but not on that of H assulta. Ratios of length and width of valves were 5.6 on H. assulta and 4.3 on H. armigera. Numbers of setae on hindtibia of H. assulta and H. armigera were 8.5, 11.4, respectively.
Egg Parasitism of Scirpophaga incertulas Walker (Lepidoptera: Pyralidae) by Hymenopterous Parasitoids in IRRI Rice Fields
Heinrichs, E.A. ; Mylvaganam, P. ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 37~40
We surveyed the IRRI farm to determine the extent of parasitization of yellow stemborer egg masses. The egg masses were randomly collected at weekly intervals from July to October 1984 from rice fields, 15-20 days after transplanting, and brought to the laboratory for collection of emerging parasites. Three species of hymenopterous parasitoids-Tetrasticus schoenobii, Telenomus rowani, and Trichogramma japonicum-were found from 700 egg masses. We introduced a method to calculate percent parasitism as based on parasite biology and behaviour. Among the three species, the combination of T. rowani and T. japonicum was the highest multiparasitization of yellow stem borer egg masses, and T. rowani, a solitary parasite had the highest number based on immature and adult stages counted. However, T. schoenobii may be the most efficient parasite because two to four host eggs are needed to complete the larval period, and it took
days for one generation.
Effect of Conidial Number and Nutrition on the Germination of Conidia in Colletotrichum dematium f. sp. capsicum Causing Red Pepper Anthracnose
Chung, Bong-Koo ; Lee, Sang-Bum ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 41~46
Exogenous factor and nutrients affecting for conidial germination of Colletetrichum dematium f. sp. capsicum causing red pepper anthracnose were studied by slide germination test. Optimum temperature of conidial germination was at
, ranging 15 to
. Optimum pH was at 5.5, ranging 4.5 to 8.0, and more than 90% of relative humidity (RH) was optimum. Poor conidial germination of the fungus was observed on sterile distilled water, but potato sucrose broth (PSB), red pepper fruit broth (RPFB), green pepper fruit broth (GPFB) and pepper leaf broth (PLB) furnished a satisfactory nutrients for conidial germination. Exogenous supply of carbon and nitrogen sources were essential for conidial germination, while potassium, phosphorous and sulfur were not evident as that for carbon and nitrogen. Soluble starch was the most suitable as a carbon source for conidial germination and followed by D-glucose, D-galactose and lactose in that order. Maximum germination was attained in the
conidia per ml. Germination was decreased with increment of conidial concentration, and in the density of
conida per ml, germination was nearly supipressed. It suggested existing a self-inhibitor. Non-washed conidia germinated more than washed conidia, and conidial germination was also gradually decreased by increasing conidial density.
Studies on the Distribution of Streptomyces spp. in Soil in Korea
Park, J.E. ; Choi, Y.C. ; Sin, Y.H ; Lee, K.H. ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 47~51
A study was undertaken to investigate the distribution of Streptomyces spp. in soil in Korea. Among the different types of soil surveyed, the highest population of Streptomyces spp. recording
was observed in upland soil. With reference to the soil depth, most of their population was distributed from soil surface to 5cm depth and the highest value was found in
soil depth. Comparing the population of Streptomyces spp. with different soil color (by Munsell soil color chart), the highest value of
was showed in Oliver yellow soil (2.5Y, 6/4). On the basis of the acidity of soil samples subjected to Streptomyces spp. isolation, it is considered that the optimum pH range for Streptomyces spp. in soil lies between 6.0 to 7.5, showing the highest value of
at pH 7.5. Among the colors of isolated colonies, gray and white colonies occupied 60% and 26% of the total isolates respectively.
Selection of Soybean Cultivars Resistant to Soybean Cyst Nematode, Heterodera glycines
Choi, Y.E. ; Kim, D.G. ; Choi, D.R. ;
Korean journal of applied entomology, volume 25, issue 1, 1986, Pages 53~61
The races of soybean cyst nematode, Heterodera glycines were investigated at 13 localities in Kyungpook, Chungpook and Cheonnam provinces for the resistant soybean variety selection to soybean cyst nematode. Race C, 1, and 5 were distributed and among them race 5 was dominant in Korea. Native soybean 203 lines and 25 introduced soybean varieties were investigated in field where soybean cyst nematode race 5 infested. As the result, the reproduction of soybean cyst nematode in native soybean lines decreased on entry number 18, 21, 36, 38, 41, 42, 43, 45, 55, 59, 68, 72, 75, 93, 94, 95, 98, 123, 131, 136, 146, 170, 174, 187, 190, 191 than others. And then, in pot experiment, entry number 170 showed moderately resistant with 10 cysts per root, while entry number 55 was decreased reproduction a little and the other 25 line appeared susceptibility. In introduced soybean varieties, Peking, Illsoy and PI90763 showed resistance and not reproduction in field and pot experiment. But Custer, Delmar, Dyer and Jackson represented moderately resistant under 10 cysts, while the other 18 varieties were susceptible. In yield analysis, native soybean line 170 showed the same tendency as Peking and PI90763 known for resistant varieties in decreased rate of branch number, pod number, pod weight per plant and weight of 100 grains. Peking and PI90763 decreased at the rate of under 1.6% in branch number, pod number, pod weight per plant and weight of 100 grains, while Illsoy showed a little higher decreased rate of 3.8% in pod number and 3.4% in pod weight per plant. Custer, Delmar, Dyer and Jackson represented a little higher decreased rate in yield.