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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 24, Issue 3 - Nov 1985
Volume 24, Issue 2 - Sep 1985
Volume 24, Issue 1 - Apr 1985
Selecting the target year
Characteristics of the Aggregation Pattern of the Striped Rice Borer(Chilo suppressalis(Walker) during the Larval Stage
Ryoo, Mun-Il ; Lee, Moon-Hong ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 1~6
The data on the striped rice, borer populations, collected in the four years from 1973 to 1976, was reanalyzed to study the characteristics in the aggregation pattern of the insect larvae in the paddy fields. The distribution pattern of the larvae was well fitted to the negative binomial model in both the first and the second generation. With reference to the Green's coefficient of dispersion estimated, the aggregation of the larvae was categorized into three phases: initial high aggregation, changing, and dispersed stable phase. Except the changing phase, each phase in each generation could be defined by a common k. The phase-change was initiated by the larval dispersal between hills of the rice plants: the larvae of the third stage and those of the fifth stage, for the first and second generation, respectively. The characteristics of the aggregation pattern were stable in the second generation. In the first genaration, the pattern was more or less variable, indicating that the life system of the insect in the first generation was more susceptible to the variations of the external physical factors than that in the second generation.
Ecological Studies on Rice Sheath Blight Caused by Rhizoctonia solani III. Cultural Method and Disease Development
Kim, Chang-Kyu ; Ra, Dong-Soo ; Min, Hong-Sik ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 7~10
Transplanting date, planting space and nitrogen level were evaluated for disease development of rice sheath blight using two rice cultivars, Jinheung and Yushin. Sheath blight disease was more severe in early transplanting plot (May 16), narrow planting space(
) and high nitrogen level (220kg/ha for Jinheung and 300kg/ha for Yushin) conditions than in May 26 transplanting plot, wide planting space (
) and standard nitrogen level (110kg/ha and l50kg/ha). At the same time, cultural conditions favorable for disease development during growth stage resulted in greater damage at maturing stage.
Aphidivorous Activity of a Coccinellid Beetle, Harmonia axyridis Pallas(Coleoptera: Coccinellidae)
Choi, Seung-Yoon ; Kim, Gil-Hah ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 11~14
Some experiments were conducted to evaluate the aphidivorous activity of coccinellid beetle, Harmania axyridis Pallas. Experiments were carried out using with laboratory reared beetles and two aphid species(Aphis gossypii and Myzus persicae). Factors referred in the study of aphidivorous activity were the age of beetle, aphid species, temperatreu and illumination time. The aphidivorous activity was greatly different in relation to aphid species, developmental stages of the beetle, and the temperature. The 3rd and 4th instar larvae consumed more aphids than the 1st and 2nd instar larvae. Though the beetles consumed more number of cotton aphid, total weight of aphids consumed the more or less the same. Aphidivorous activity of the 1st to 4th instar larvae increased with a rise in temperature and adult activity was relativel high at
and low at
. The aphidivorous activity of the beetles was not influenced by the illumination period under the conditions given in this experiments, however, seem to require further study.
Studies on the Morphology and Biology of a Parasitic Mite, Pyemotes tritici L.-F. & M. on the Cigarette Beetle(Lasioderma serricorne F.).
Oh, M.H. ; Kim, S.S. ; Boo, K.S. ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 15~18
Studies were made on the morphology and life cycle of the mite, Pyemotes tritici
(Trombidiformes; Pyemotidea) ,parasitic on larvae of cigarette beetle, Lasioderma serricorne F., which is one of the most serious pests of stored tobacco, cigar, and cigarette in Korea. One generation time was
days out of which
days were spent for feeding and
days for reproduction of progenies. A female of this insect-parasitic mite produced
progenies during her reproduction period. The body size of a newly-laid male or female was
wide. As female of this mite sucked on, their abdomen grew larger and larger to reach
in width and
in volume after
days. By sucking the humor of a host, the abdomen of a female mite became almost a global shape in two days. The increase rate of abdominal width was the biggest on the second or the third day of feeding while the volume of abdomen reached to the largest on
days after feeding. The largest number of the daily young produced on 4-th day after a female began to reproduce.
Tolerance of Alternaria mali to Various Fungicides
Lee, Chang-Un ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 19~24
Alternaria mali isolated from infected apples in storages and orchards of the four main apple growing areas of Taegu, Yesan, Jungup and Chungju in Korea was tested with various fungicides added in PSA medium. The fungal tolerance varied with little difference by orchard area and with great difference by king and concentration of fungicide. Minimum inhibitory concentration (MIC) of chlorothalonil and captafol was
, respectively, showing low effects with high fungal tolerance; of iprodione and folpet was
, respectively, showing moderate effects with moderate fungal tolerance; and of oxidong, polyoxin and polydong was
, respectively, showing high effects with low fungal tolerance. Mycelial growth, conidia formation and conidia germination of the fungus showed a similar trend of response to the seven fungicides.
Studies on Life Cycle of Rice Leaf Beetle (Oulema oryzae KUWAYAMA) and Control Method
Yu, B.J. ; Kim, C.O. ; Chung, S.M. ; Park, Y.S. ; Huh, B.L. ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 25~28
Experiments were carried out to investigate the life cycle of the rice leaf beetle (RLB), (Oulema oryzae KUWAYAMA) ,yield losses by its damages, and control method in
at the experimental field of Gangweon PORD. Peak occurrence of adult and larva rice beetle was late May and mid-June, respectively. Adult overwintered in the forest of mountain and move into the paddy field to lay eggs on the rice leaf from late seedling stage. A female adult laid eggs for 2 days, and egg, larval and pupal period was 9, 16, and 9 days, respectively. Leersia japonica MAKINO was damaged slightly by the beetle. The yield reduction by artifical defoliation ranged from 6 to 40% and yield reduction increased as leaf feeding delayed until mid-July. All insecicides show 100% of control value against RLB.
Within Field Distribution Pattern and Design of a Sampling Plan for Damaged Onions by the Onion maggot, Hylemya antiqua Meigen(Diptera: Anthomyiidae)
Park, C.G. ; Hyun, J.S. ; Cho, D.J. ; Lee, K.S. ; Hah, J.K. ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 29~33
Every plant in
onion field was inspected for damages by the onion maggot. Maps were constructed every ten days to show which plants were infested and which were not from April 11 to May 21, 1984. The maps were sectioned into squares one of which contains 80 onion plants and the counts of damaged onions in each square were fitted to poisson and negative binomial distribution and tested by chi-square. We argue that the satisfactory fitness of the expected negative binomial $[P(x^2)>0.05]$ provided a useful description of the spatial distribution patterns of the damaged onions. Edge effect was tested by the differences of damage ratio and variance/mean ratio (
) between edge and center part. The result showed that the damage ratioes and variances of all the periods,
values after May 1 were greater in edge part than in center part. Again, the maps were sectioned into four blocks and the squares (sample units) were sectioned into quadrants. By application of the variance component technique, it was suggested that
sample units for 5% sampling error and
sample units for 10% error should be sampled randomly to estimate the damage ratio when
quadrants were inspected.
Oviposition by the Adults of a Green Lacewing, Chrysopa formosa Brauer (Neuroptera: Chrysopidae), Reared on Artificial Diets
Park, Seung-Chang ; Woo, Kun-Suk ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 34~38
Effects of some artificial diets containing pulverized silkworm pupae On the oviposition of a green lacewing, Chrysopa formosa, were studied. The pulverized silkworm pupae with honey seemed to be a good diet for the egg-laying activity of field-collected adults in the beginning of rearing, but their fecundity progressively decreased. Newly emerged adults. did. not lay eggs when fed the above diet, but they were able to lay eggs when the silkworm pupae were defatted and provided with honey. An adult female laid an average of 166.8, 110.2, 96.1, and 66.1 eggs after spending 5, 9, 9, and 11 days for the initiation of oviposition when supplied with various diets i.e. the cabbage aphid, defatted silkworm pupae with additive constituents, mixture of intact and defatted silkworm pupae with additive constituents, and defatted silkworm pupae with honey, respectively.
Selection of Tissue Papers for Nematode Extraction from Soil in Combined Screening-funnel Method
Cho, Myoung-Rae ; Choi, Young-Eoun ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 39~44
This study was undertaken to select a suitable Korean tissue paper for Baermann funnel method. Ten kinds of five manufacturers were evaluated as to nematode extraction efficiency in Baermann funnel. 'Crown Hankie'(Korea Special Paper Co., Ltd.) had suitable properties in nematode permeability and strength regardless of three soil types, loamy sand, sandy loam and clay loam. The number of nematodes extracted using 'Crown Hankie' 4 ply was 198, while that of 'Cottonwool Nematode Filter' was 227. Un-perfumed tissue papers showed higher nematode extraction efficiencies than perfumed tissue papers by 53 and 23% in 'Kleenex New Softness' and 'Monaliza Finely Soft Tissue', respectively. Among the nematode extraction efficiencies by temperatures,
, it was highest at
. In experiment of evaluating nematode extraction using Baermann funnel at 12 hours interval to 92 hours, 35.3 and 40.3% of nematodes were extracted after 12 and 24 hours, respectively
A Rapid Procedure for Screening and Isolation of Various Sizes of Plasmid DNA in Serovars of Bacillus thuringiensis
Faust Robert M. ; McCauwley Patricia E. ; Meyers-Dowling Carol L. ;
Korean journal of applied entomology, volume 24, issue 1, 1985, Pages 45~50
The use of a modified procedure for the isolation of extrachromosomal DNA of low to high molecular weight, followed by agarose gel electrophoresis of the crude lysates, provided a simple screening procedure for detecting plasmids ranging in molecular weights from approximately 1 to more than 135 megadaltons from serovars of Bacillus thuringiensis. The procedure provides for a relatively large-volume stable lysate for isolation of plasmids for restriction endonuclease mapping and cloning procedures. The method was used for screening of plasm ids in 6 differenentially effective serovars of B. thuringiensis toxic to dipteran and lepidopteran insects. Relatively large plasmid DNAs of masses above 50 megadaltons (Mdal) were isolated from all of the serovars examined using this technique. The number of extrachromosomal DNAs detected in serovars of B. thuringiensis was 8 for israelensis, 10 for kurstaki, 13 for aizawai, 2 for dendrolimus, 1 for finitimus, and 6 for yunnanensis. Smaller plasmid DNAs were isolated in four of the six serovars that ranged in mass down to approximately 2 Mdal.