Sex pheromone composition of the variegated cutworm,Peridroma saucia (Lepidoptera: Noctuidae), in Korea |
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Authors: | Kyung San Choi Jum Rae Cho Jeong Heub Song Dong-Soon Kim Kyung Saeng Boo |
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Institution: | 1. Department of Subtropical Agriculture, National Institute of Subtropical Agriculture, RDA, Jeju 690-150, Republic Korea;2. Applied Entomology Division, National Institute of Agricultural Science and Technology, RDA, Suwon 441-707, Republic Korea;3. Agricultural Environment Division, Jeju-do Agricultural Research and Extension Service, Jeju 690-815, Republic Korea;4. Majors in Plant Resource Sciences and Environment, College of Applied Life Sciences, Cheju National University, Jeju 690-756, Republic Korea;5. School of Agricultural Biotechnology, Seoul National University, Seoul 151-742, Republic Korea |
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Abstract: | This study was conducted to investigate the sex pheromone composition of the variegated cutworm (Peridroma saucia Hübner) in Korea. The sex pheromone components of P. saucia were identified as (Z)-9-tetradecenyl acetate (Z9-14:Ac) and (Z)-11-hexadecenyl acetate (Z11-16:Ac) through GC-EAD and GC–MS analysis. EAG tests of the male antennae revealed that the Z9-14:AC exerted significantly larger responses than other compounds. The female moths primarily called and copulated between 6 h and 7 h after the lights off, and the ratio of two pheromone components, Z9-14:Ac and Z11-16:Ac, in the sex pheromone gland during this period was 1:2.1 to 1:2.4. In the field trapping studies, a large number of male moths were caught in the traps baited with the mixtures of Z9-14:Ac and Z11-16:Ac at the ratios ranging from 2.3:1 to 1:4, with the highest trap catches at 1:1 to 1:2.3 ratios of the two components. The seasonal flight activities of P. saucia monitored by using pheromone lures revealed complicated patterns in Korea. Specifically, the first flight period was spread over a long period and irregular, while the second flight period differed among the localities examined. |
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