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A synergist for attracting Stathmopoda masinissa
Junheon Kim,Gwang Hyun Roh,Chung Gyoo Park 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
Stathmooda masinissa is one of the most serious lepidopteran pests which damaging the furit of persimmon. Its pheromone composition has been idetified as (E4,Z6)-4,6-hexadecadienyl acetate (E4,Z6-16Ac) and (E4,Z6)-4,6-hexadecadien-1-ol (E4,Z6-16OH). We evaluated electrophysiological response of (E4,Z6)-4,6-hexadecadienal (E4,Z6-16Ald) and attractivenss of E4,Z6-16Ald by combination of two pheromone components. E4,Z6-16Ald evolked electrophysiological responses as same to that of two pheromones. The lure combined with E4,Z6-16Ald and two pheromone components attracted more male S. masiissa.
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.
Synthesis of Insect Pheromone: (Z)-3-dodecenyl acetate
Junheon Kim,Chae-Hoon Paik 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05
Monoalkenyl acetates are used as one of lepidopteran pheromone components. However, (Z)-3-alkenylacetate as pheromone components is rarely known. Among them, (Z)-3-dodecenylacetate is used as pheromone components of Aproaerema anthyllidella and Tecia solanivora. Recently, (Z)-3-dodecenylacetate was identified as one of pheromone components for an insect pest in Korea (unpublisheddata). For the demand of development of mating disruption against thepest, large amount of (Z)-3-dodecenylacetate (Z3-C12Ac) was needed. Here, we reported the synthetic procedures for (Z)-3-decenylacetate (Z3-C12AC). The Grignard reagent from 1-decyne and ethyl magnesium bromide was reacted with ethylene oxide in dry tetrahydrofuran (THF). Thus synthesized 3-dodecyn-1-ol was reduced to (Z)-3-dodecen-1-ol (Z3-C12OH) by hydrogenation over Lindlar’s catalyst. The alcohol was acetylated to desired (Z)-3-dodecenylacetate (Z3-12Ac) with acetic anhydride by general procedures. The yield was 62.6% through the all procedures. Thepurity was 98.0% (by GC-MS). The isomeric purity was >99% (by NMR).
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.
A Facile Synthesis of Aggregation Pheromone Components of Riptortus pedestris
Junheon Kim,Kwangil Park,Chung Gyoo Park 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05
The bean bug, Riptortus pedestris, is one of the important pest of soybean, apple, and sweet persimmon. Since its aggregation pheromone was identified, monitoring and controlling the pest by using aggregation pheromone have been developed. Aggregation pheromone of R. pedestris is comprised of (E)-2-hexenyl (E)-2- hexenoate (E2HE2H), (E)-2-hexenyl (Z)-3-hexenoate (E2HZ3H), tetradecyl isobutyrate, and octadecyl isobutyrate. For developing more facile synthetic method, Steglich esterification was applied for syntheisis of E2HE2H and E2HZ3H under various conditions. E2HE2H and E2HZ3H were prepared in a single step with (E)-2-hexenoic acid for E2HE2H and (Z)-3-hexenoic acid for E2HZ3H, and (E)-2-hexenol in aprotic solvents (CH2Cl2, diethyl ether and toluene). Yields of E2HE2H was 59.7-77.3%, 56.1-57.7% and 75.6-77.6% under CH2Cl2, diethyl ether and toluene solvent systems, respectively (purity: 92.8-97.0%). Yield of E2HZ3H was 87.2-90.8% under CH2Cl2 condition (purity: 96.2-97.0%). The applied Steglich esterification method gave as same yield as previously reported method and saved time and cost.
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.
Mamesastra brassicae was captured its pheromone trap installed on Machilus thunbergii
Junheon Kim,Young-Min Shin,Yeongdon Lee,Hyerin Ma,Il-Kwon Kim 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10
Machilus thunbergii (Laurales: Lauraceae, 후박나무) is planted as a street tree in Jeollanamdo and Jeju Island. Orthaga olivacea (Lepidoprate: Pyralidae, 제주집명나방) is known as a major pest of M. thunbergii. For managing O. olivacea by eco-friendly control method, the mating disruption would be expected. The sex pheromone of O. olivacea was identified as a mixture of (Z)-11-hexadecenyl acetate (Z11-16Ac), (Z)-11-hexadecenal (Z11-16Ald), and (Z)-11-hexadecenol (Z11-16OH) at a ratio of 100: 0.1:0.1 by Chinese research group. Before applying mating disruption, confirmation of its attraction in Korea was essential. The pheromone traps composed of Z11-16Ac alone and the blend of three components (100:0.1:0.1) were installed in Haenam, Jeollanamdo in 2021, and Jeju and Seogwipo, Jeju in 2022. In field attraction test, no O. olivacea was attracted to any trap. However, Mamesastra brassicae (Lepidoptera: Noctuidae), which was not intended, was caught in both years in the trap. Total of 19 in Haenam between September 23 and 30, total of 11 in Jeju between September 30 and October 28, and total of 108 in Seogwipo between September 15 and November 11 were caught to the trap lured with Z11-16Ac. While in the trap lured with the blend, total 1 and 6 were captured in Haenam and Seogwipo, respectively.
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.