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제주도 설록다원에서의 관행재배와 유기농재배 간 해충 발생 비교
유주(Ju Yoo),이진호(Jin-Ho Lee),이민석(Min-Seouk Lee),이정대(Jung-Dae Lee),임유진(Yu-Jin Lim),김동순(Dong-Sun Kim),박정규(Chung-Gyoo Park) 한국차학회 2012 한국차학회지 Vol.18 No.4
A comparative study between a conventional and organic spray program was conducted in terms of the abundances of arthropod pests. The tea red spider mite (Tetranychus kanzawai Kishida) populations were abundant in the 1st and 2nd tea growing season, and there was no significantly difference between the two spray programs. The density of the tea green leafhopper (Empoasca onukii Matsuda) was low in the 1st tea growing season, whereas it was high in the 2nd growing season in most cases. In the 2nd tea growing season, the density of this pest was higher in the years with the organic spray program than in the years with the conventional spray program. On the other hand, its abundance was low in the 3rd tea growing season. Therefore, additional management tactics are required in the 2nd tea growing season. Yellow tea thrips (Scirotothrips dorsalis Hood) were observed during the full seasons from late April to late October in tea farms. In the conventional spray program, there was a higher density in the 2nd and 3rd tea growing seasons. On the other hand, its population densities were regulated at a low level after converting to the organic spray program. Oriental tea tortrix (Homona magnanima Diakonoff) showed 4 times peak occurrence a year. Monitoring of the adult flight activity of the moth using sex pheromone traps revealed a sharp decrease in the catches after adopting the organic spray program; possibly due to the activity of hymenopteran parasitiods. The tea leaf roller (Caloptilia theivora Walsingham) showed 5 times of peak occurrence in a year. The population abundances increased considerably after converting to an organic spray program. Stink bug damage occurred after an organic cultivation period of the 1st tea growing season. Stink bugs of 11 species were observed during organic cultivation.
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