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IL-Kwon Park,Junheon Kim,Yeon-Suk Lee,Sang-Gil Lee,Sang-Chul Shin 한국응용곤충학회 2008 한국응용곤충학회 학술대회논문집 Vol.2008 No.05
Plant essential oils from twenty plant species were tested for their insecticidal activity against larvae of Lycoriella ingenua using a fumigation bioassay. Good insecticidal activity (>90%) against larvae of L. ingenua was achieved with essential oils of caraway seed (Carum carvi), lemongrass (Cymbopogon citratus), mandarine (Citrus reticulate), nutmeg (Myristica fragrans), cade (Juniperus oxycedrus), spearmint (Mentha spicata), cumin (Cuminum cyminum) and thyme red (Thymus vulgaris) oils at 30×10-3 mg/㎖ air. Among them, caraway seed, spearmint, cumin and thyme red essential oils were highly effective against L. ingenua at 20×10-3 mg/㎖ air. Analysis by gas chromatography-mass spectrometry led to identification of 4, 9, 8 and 17 compounds from caraway seed, spearmint, cumin and thyme red oils, respectively. These compounds were tested individually for their insecticidal activities against larvae of L. ingenua, and compared to the toxicity of dichlorvos. Carvacrol, thymol, linalool, cuminaldehyde, p-cymen, terpinen-4-ol and carvone was effective at 10×10-3 mg/㎖. The insecticidal activity of dichlorvos was 60% at 10×10-3 mg/㎖. Effects of four selected plant essential oils on growth of Pleurotus ostreatus were also investigated.
Junheon Kim,Sum-Mi Suh,Sang-Gil Lee,Sang-Chul Shin,Il-Kwon Park 한국응용곤충학회 2008 한국응용곤충학회 학술대회논문집 Vol.2008 No.05
Commercial plant essential oils from 27 plant species were tested for their nematicidal activities against the pinewood nematode, Bursaphelenchus xylophilus. Good nematicidal activity against B. xylophilus was achieved with essential oils of coriander (Coriandrum sativum), styrax (Liquidamber orientalis) and valerina (Valeriana wallichi). Analysis by gas chromatography-mass spectrometry led to identification of 26, 10 and 4 major compounds from coriander (Coriandrum sativum), styrax (Liquidamber orientalis) and valerina (Valeriana wallichi) oils, respectively. These compounds from three plant essential oils were tested individually for their nematicidal activities against the pine wood nematode. Among compounds, benzaldehyde, trans-cinnamyl alcohol, cis-asarone, octanal, nonanal, decanal, trans-2-decenal, undecanal, dodecanal, decanol, and trans-2-decen-1-ol showed strong nematicidal activity. The essential oils and their described herein merit further study as potential nematicides against the pine wood nematode.
Junheon Kim,Dong-Soo Kim,Shigeru Matsuyama,SangMyeong Lee,Sung-Chan Lee,Il-Kwon Park 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.3
Black pine bast scale, Matsucoccus thunbergianae spreads rapidly to northern and eastern coastal regions and caused serious damage to black pine trees, Pinus thunbergii. To monitor accurate occurrence with the sex pheromone of M. thunbergianae, we synthesized racemic matsuone [(2E,4E,6R)-4,6,10,12-tetramethyltrideca- 2,4-dien-7-one] and evaluated its attractiveness with two types of stick traps in Namhae, Sacheon, and Jinju. Two-sided sticky traps baited with the sex pheromone attracted significantly more male M. thunbergianae in Namhae in 2013. Eight-sided sticky traps baited with 50 μg racemic matsuone attracted significantly more males M. thunbergianae than did control traps at Namhae and Sacheon in 2014. The resultwas confirmed through a field bioassay performed at Jinju in 2015. Our results suggest that the newly developed eight-sided stick pheromone traps could supply more accurate but also easier to apply monitoring data than the traditional egg sac survey method for M. thunbergianae.
Identification and Field Test of Sex Pheromone Components from Stathmopoda masinissa
Junheon Kim,Seul-Bi Lee,Chung Gyoo Park 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.10
The sex pheromone of Stathmopoda masinissa (Lepidoptera: Stathmopodidae) [감꼭지나방], an important pest of persimmon in Korea, was studied. Two pheromone components which known from Japanese population were detected in the gland extracts of females by mass spectral analysis of the gland extracts and comparisons of retention time with authentic compounds. Those were (E4,Z6)- 4,6-hexadecadienyl acetate (E4,Z6-16Ac) and (E4,Z6)-4,6-hexadecadien-1-ol (E4,Z6-16OH) in the ratio of 10:90. In a persimmon orchard, a single compound of E4,Z6-16Ac and E4,Z6-16OH was attractive to S. masinissa. However, the mixture of E4,Z6-16Ac and E4,Z6-16OH (1:1) caught significantly more males than each single component. In addition, the traps baited with E4,Z6-16Ac attracted significantly more Oedematopoda ignipicta (Lepidoptera: Stathmopodidae) [붉은꼬마꼭지나방] than control. These results suggest that both of the E4, Z6-16Ac and E4,Z6-16OH are needed to attract S. masinissa
Junheon Kim,Sin Ae Jang,Heung-Su LEE,Bong Kyu Byun,Chung Gyoo Park 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.04
The seasonal occurrence of two Tortricinae species, Adoxophyes honmai (Yasuda) and Homona magnanima Diakonoff, was monitored at persimmon orchard in Changwon city, Gyeongnam, using sex attractant traps in 2012 and 2013. During the monitoring, a number of Neocalyptis angustilineata (Walsingham) was attracted to sex pheromone traps of H. magnanima. For A. honmai, a blend of Z9-14Ac, Z11-14Ac, E11-14Ac, 10me-12Ac with the ration of 314, 623, 55, and 9 ㎍ respectively, was used. A blend of Z11-14Ac and Z9-12Ac in the ratio of 900+100 ㎍ was used for H. magnanima. A 1:1 blend of Z11-14Ac and Z9-12Ac (500+500 ㎍) was also used for N. angustilineata. The two-years’ monitoring revealed that A. honmai and H. magnanima occurred four times a year, and N. angustilineata did three times. The peak occurrence of each generation for A. honmai was the 2nd or 3rd week of May, the 1st to 2nd week of July, and 5th week of July to 1st week of August, and 2nd to 4th week of September for the 1st, 2nd, 3rd, and 4th generation, respectively. The peak occurrence of each generation for H. magnanima was the 3rd to 4th week of May, the 2nd to 3rd week of July, and 4th week of August to 1st week of September, and 4th week of September to 3rd week of October for the 1st, 2nd, 3rd, and 4th generation, respectively. N. angustilineata showed clear three peaks of the 5thweek of May to 1st week of June, from 4th to 5th week of July, and 1st to 3rd week of September for the 1st, 2nd, and 3rd generation, respectively. A significantly higher number of N. angustilineata was attracted to sex pheromone traps of H. magnanima for the two years than H. magnanima was. H. magnanima was attracted only to the 9:1 blending ratio. However, N. angustilineata was attracted equally to both of the blending ratios.
A New Pheromone-Baited trap for Riptortus clavatus
Junheon Kim,Min-Ju Lee,Seong-Ho Kang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.10
Riptortus clavatus is one of the most serious pests affecting the cultivation of sweet persimmon, which is one of the most important export fruits in Korea. A pheromone-baited trap has been used in attempts to control this pest. Although the trap showed relatively good trap efficacy, it was often observed that R. clavatus walks around and rests on the surface of the trap rather than entering the trap. In the present study, the development of a more efficient pheromone-baited trap for R. clavatus was pursued by investigating 3 different traps: the fish trap, the pyramidal trap, and the symmetry trap. The fish trap captured the lowest number of R. clavatus, and the pyramidal trap showed moderate capture efficacy. Significantly greater numbers of R. clavatus adults were captured in the symmetry trap. Significantly increased trapping efficacy of the symmetry trap would be useful for mass trapping of R. clavatus.