간행물
한국응용곤충학회지 KCI 등재 Korean Journal of Applied Entomology
- 발행기관 한국응용곤충학회
- 자료유형 학술지
- 간기 계간
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Vol. 47 No. 2 (2008년 6월) 11건
1.
2008.06
구독 인증기관 무료, 개인회원 유료
This study was conducted to distinguish adult morphology of the giant water bug (Lethocerus deyrollei) between over-wintered (OLD) and new-born (NEW) populations using materials collected from Gyodong island in Gyeonggi-do, Korea, as well as individuals reared in the laboratory (LAB population) as a control. As a result, no fundamental differences were found in external body structure between OLD, NEW, and LAB populations. However, marginal area of basal procoxa in ventral prothorax and jointed part of forefemur and foretibia were greatly worn in the OLD population. Mid-claws were shorter than 0.5 times the length of the 2nd mid-tarsus, the membranous margin of hemelytra was greatly worn, and hairs of the 5th abdominal tergum were greatly reduced in the OLD population.
4,000원
2.
2008.06
구독 인증기관 무료, 개인회원 유료
Nine species of Curculionidae, Pimelocerus elongates (Roelofs, 1873), Phylaitis maculiventris Voss, 1958, Egiona picta (Roelofs, 1875), Cryptorhynchus electus (Roelofs, 1875), Rhadinopus confinis Voss, 1958, R. sulcatostriatus (Roelofs, 1875), 1962, Deiradocranus setosus (Morimoto, 1962), Rhadinomerus annulipes (Roelofs, 1875), and R. maebarai Chûjô et Voss, 1960 are recorded for the first time in Korea. And the distribution of the species of Shirahoshizo hiurai Morimoto to Korea which its distribution was unclear is confirmed with this report. Habitus photos and descriptions of the species are given.
4,000원
3.
2008.06
구독 인증기관 무료, 개인회원 유료
Ambrosia beetle, Platypus koryoensis, is a vector of oak wilt disease caused by Raffaelea sp. in Korea. The degree of damage by oak wilt disease was dependent on the density of the beetles in the oak trunk, a relationship between the degree of damage by oak wilt disease and the density of beetle on the basis of the number of entry hole was studied. Entry hole distribution within tree trunk was analyzed by the nearest neighbor method. Thirty four oak trees (Quercus mongolica) located in survey area were selected and then degree of damage, the number of attack hole/623 ㎠ in upper (50 ㎝ from the surface) and lower (surface) trunk and the nearest neighbor distance between the holes were measured. The number of hole and the nearest neighbor distance in upper and lower part were positively correlated with each other. As the degree of damage was severer, the number of the holes increased, whereas the nearest neighbor distance decreased. The distribution pattern of the hole was changed from clumped one to uniform as the severity of damage increased. These results suggested that Platypus koryoensis attacked the oak tree in concentrative manner at initial stage of attack but at final stage, it distributed uniformly to reduce intraspecific competition between the beetles.
4,000원
4.
2008.06
구독 인증기관 무료, 개인회원 유료
This study was performed to investigate the immature development period, fecundity, emergence rate and sex ratio of Sclerodermus harmandi against different host insects, Monochamus alternatus, M. saltuarius and Psacothea hilaris. Full grown larvae and pupae of host insects were provided with foods. The mean larval period of S. harmandi female was 29.2±0.93 and 25.1±0.47 days in larvae and pupae of M. alternatus, 27.1±0.41 and 26.0±0.69 days in M. saltuarius, and 26.3±0.38 and 31.2±0.24 days in P. hilaris, respectively. S. hilaris adults were emerged at 12.9±0.2 days in female and 11.9±0.2 days in male after pupation when hosted M. alternatus pupa. Development period in male showed shorter one day than in female. Success rate of oviposition against different hosts was higher as 98.6 and 97.5% on full grown larva and pupa of M. saltuarius. Emergence rate was higher as 90.1 and 87.3% on M. saltuarius larvae and pupae. Sex ratio of emerged S. harmandi adults was approximately 10:1 (Female : Male), females showed higher emergence rate than males. The period until first oviposition after emergence in S. harmandi female was the shortest in 4.6±0.1 days on M. saltuarius pupa. When three females of S. harmandi were inoculated on M. saltuarius larva, the number of laid eggs was the highest 62.7±2.5 per female.
4,000원
5.
2008.06
구독 인증기관 무료, 개인회원 유료
Male adults of bean bug, Riptortus clavatus Thunberg (Heteroptera: Alydidae), release aggregation pheromone (AP) attracting both sexes of adult and nymphs, which its egg parasite, Ooencyrtus nezarae (Hymenoptera: Encyrtidae) exploits the pheromone to find host. The AP consists of three components, (E)-2-hexenyl (Z)-3-hexenoate (E2HZ3H), (E)-2-hexenyl (E)-2-hexenoate (E2HE2H), and tetradecyl isobutyrate (TI). We analyzed composition of the pheromone components of bean bugs from different geographical locations of Korea and Japan. The attractiveness of different blends of AP components to R. clavatus was also tested in the fields in Jinju, Korea and in Kumamoto, Japan. Composition ratios (E2HZ3H: E2HE2H:TI) of the AP of Jinju and Iksan populations were 1:1.4:0.2 and 1:0.8:0.2, and those of Tsukuba and Kumamoto populations were 1:2.8:0.2 and 1:1.5:0.1, respectively. In field tests, traps baited with ratio of 1:1:1 (E2HZ3H:E2HE2H:TI = 16.7:16.7:16.7 ㎎/rubber septum) and 1:1:0.5 (E2HZ3H:E2HE2H:TI = 20:20:10 ㎎/rubber septum) attracted significantly greater number of adult bugs than that of 1:5:1 (E2HZ3H:E2HE2H:TI = 7.1:35.7:7.1 ㎎/rubber septum).
4,000원
6.
2008.06
구독 인증기관 무료, 개인회원 유료
Pyrausta panopealis is the major pest in green perilla. The larva weaves a web on the shoot of green perilla and damages. In case of extreme, The larva cuts the main branch of green perilla and the leaf of green perilla isn’t harvested anymore. A field study was conducted to estimate economic injury levels (EILs) and control thresholds (CTs) for P. panopealis injuring green perilla in green-houses. Different densities of P. panopealis ranged from 1 to 20 crops (2 units per crop) per 100 crops on 13. June, early inoculation. The number of injured leaf and the rate of injured crop were increased by 23. June, on the other hand were decreased after that day. Also, the amount of yield sow the same result above. The economic loss time calculated by the ratio of cost managing this moth to market price (C/V) (C: cost managing a moth, V: Market price) was 4.0%. The economic injury level was 5.1 larval per 100 crops. The control thresholds calculated by 80% level of economic injury level was 4.1 larval per 100 crops.
4,000원
7.
2008.06
구독 인증기관 무료, 개인회원 유료
The Welsh onion beet armyworm, Spodoptera exigua (Hübner), has attacked Welsh onion and is now the most important pest of Welsh onion in southwestern Korea. The beet armyworm has a wide host range, occurring as a serious pest of vegetable and fields. The relatively high abundance of beet armyworm has stimulated frequent application of insecticides to foliage. Insecticide resistance is a major problem in management of this insect. Accordingly, pesticide application for the control of beet armyworm was tried in both the open field and in laboratory, using 4 synthetic compounds such as metaflumizone and chlorfenapyr, indoxacarb, flufenoxuron, emamectin benzoate. In the laboratory, each developmental stages from eggs, larva to pupa was tested against 4 insecticides. Against the eggs of welsh onion beet armyworm, there was no significantly different with each other. These tested chemicals no killing effect to eggs. However, the population of 1st larva hatched from eggs were reduced because they eaten the egg shell with residual insecticides. The tested insecticides were taken very high mortalities to 1st to 3rd larva of Welsh onion beet armyworm. Otherwise, there were decreased the death rate from 4th to 6th larva. On the other hand, their value of control effects were relatively good against Welsh onion beet armyworms in the field between 87.2 and 90.5% on 10 days after insecticide application.
4,000원
8.
2008.06
구독 인증기관 무료, 개인회원 유료
Temperature dependent development of Tetranychus. urticae Koch was studied on the leaf of eggplant at 17, 22, 27, 32 and 37℃, T. urticae showed a minimum mortality at 27℃ and it increased at higher or lower temperatures than 27℃. The hatchability was low at 17 and 37℃. The duration of development decreased with increasing temperatures i.e., 5.3d at 37℃ and 25.8d at 17℃. Linear regression analysis of temperature vs. rate of development yielded the higher r² ≥ 0.88 resulting in a good fit of the estimated line in the range of 17~37℃. Developmental zero temperature was 12.5℃ for the entire immature stage of female and 12.8℃ for that of male. Thermal constants were 80.5 and 74.7 degree days for those of female and male, respectively. Adult life span and oviposition period decreased with increasing temperatures. The number of eggs laid per female peaked at 141.0 eggs at 27℃, while that was a minimum 78.0 eggs at 37℃. Rate of hatchability, ratio of female, and R₀ were increased up to 27℃, and than declined thereafter. Intrinsic rate of natural increase (Rm) increased with rising temperatures and showed a maximum 0.5652 at 37℃. Also, λ increased with increasing temperature. Doubling time (Dt) and generation time (T) decreased with increasing temperature.
4,000원
9.
2008.06
구독 인증기관 무료, 개인회원 유료
The growth characteristics of Paecilomyces tenuipes according to the passage in the two kind of liquid media were investigated by comparing the mycelium and conidium formation degrees. The potato dextrose broth medium and the silkworm larvae medium containing the silkworm powder were used as the liquid media, and the potato dextrose agar medium and the brown rice medium containing the powder of silkworm pupa were used as the solid media. The conidium formation degree in liquid media differed by the passages but that in solid media was not. This suggested that the passage in liquid media did not affect significantly the conidium formation in solid media. When the brown rice media were inoculated with the concentration of 1×10¹⁰ conidia/㎖, 1×10⁸ conidia/㎖ and 1×10⁶ conidia/㎖, respectively, the conidium formation degrees were similar. This indicated that the optimal inoculation concentration of conidium to the brown rice media is 1×10⁶ conidia/㎖.
4,000원
10.
2008.06
구독 인증기관 무료, 개인회원 유료
To screen highly active Bacillus thuringiensis isolates against Spodoptera litura (Lepidoptera, Noctuidae), 46 B. thuringiensis was isolated from 115 samples obtained from several crop soils. Especially, B. thuringiensis subsp. kurstaki CAB133 and CAB162 isolates showed 100% mortality against S. litura. LD50 values of CAB133, CAB162 and HD-1 strains of B. thuringiensis subsp. kurstaki were 0.089, 3.144 and 0.513 ㎍/㎖ against 2nd larva of μ S. litura, respectively. The weight of 3rd larva of S. litura which were fed crystal inclusion protein (1.267 ㎍/㎖) with B. thuringiensis subsp. kurstaki CAB133 was about 30 times lass than control group. CAB133 and CAB 162 strains of B. thuringiensis subsp. kurstaki which were taken a highly toxity against S. litura were analyzed by SDS-PAGE, and estimated the molecular weight of the Cry proteins. Their serological identification by H serotypes were showed B. thuringiensis subsp. kurstaki (3abc) type.
4,000원
11.
2008.06
구독 인증기관 무료, 개인회원 유료
A possible rapid biodegradation of abandoned livestock was tested by using the dead pig and chicken. The dead pig (36 ㎏) was completely decomposed after 23 days of placement in the open field during June 2007. When the door of a cage in which a dead chicken (3.4 ㎏) was placed was opened, a lot of flies were attracted to the chicken and layed eggs on the chicken. As the result the chicken was decomposed down to 0.6 ㎏ after 6 days of placement in the open field, On the other hand when the door was closed, the decomposition was very slow. The chicken weighed 3.0 ㎏ even after 6 days. An experiment conducted during October 2007 showed that decomposition speed depended on the number of inoculated flies. When 50 pairs of Lucilia sericata flies were inoculated to 3.2 ㎏ chicken, it was decomposed down to 1.0 ㎏ after 22 days in the field. However, when 200 female and 100 male flies were inoculated, the 3.4 ㎏ chicken was decomposed to 0.8 ㎏ after 11 days in the field. A 10,858 pupae (371.2 g) was produced from the latter chicken. These pupae may possibly be used as a feed for fish and fowl. From these results it is considered that further research is needed to commercialize the blow flies for the rapid decomposition of an abandoned livestock of diverse size under diverse environment.
3,000원
