벼의 主要害?의 效率的인 防除法을 確立하기 위하여 慣用殺?劑인 有機燐劑系의 MPP劑, Diazinon 劑와 Carbamate劑系의 NAC劑에 대해 여러 地域의 이화명충(Chilo suppressalis W.)과 끝동매미충(Nephotettix cincticeps U.)의 抵抗性 水準 및 分布를 調査한 結果 가. MPP劑에 對한 이화명충은 朝岩, 水原, 利用系統이 楊平系統에 比하여 2~4倍의 抵抗性을 보였고 나. MEP劑에 對한 이화명충은 楊平系統에 比해 金浦, 平澤, 龍仁, 利川, 水原 및 朝岩系統이 2~6倍의 抵抗性을 보였으며 다. Diazinon劑에 對한 이화명충은 水原系統이 楊平系統에 比較하여 약 3倍의 抵抗性을 보였으나 다른 系統間에는 별차가 없었다. 라. 이화명충의 越冬幼?이 飼育幼?보다 藥劑에 대한 抵抗性이 더 떨어지는것은 飼育中 活力이 떨어지기 때문인 것으로 생각된다. 마. 끝동매미충에 있어서 MEP劑의 境遇 裡里系統이 水原系統에 比하여 약 13倍, 密陽, 平澤系統이 7~8倍, 利川系統이 4倍의 抵抗性을 보였고 바. MEP劑에 對한 끝동매미충은 역시 裡里系統이 水原系統에 比해 약 7倍, 平澤系統이 4倍로 나타났으며 사. NAC劑에 對한 끝동매미충은 地域別 系統間에는 別差를 보이지 않았다.
The study was planned to detect resistance levels of striped rice borers (Chilo suppressalis Walker) and green rice leafhoppers (Nephotettix cincticeps Uhler) from different localities to organophosphate and carbamate insecticides using topical application. Strains of overwintering striped rice borers were collected from 7 different areas in Gyeonggi Province and they were kept under conditions of about 25℃ for 10 days. Overwintered and reared larvae of striped rice borers were compared for response to insecticides. The strains of green rice leafhopper were collected from Iri, Milyang, Pyongtaek, Echeon and Suweon, Insects were multiplied in the lab. All insecticides tested were organphosphates (MPP, MEP and Diazinon) and carbamate (NAC), which have been used in control of rice insect pests for over past 10 years. The results obtained were as follows ; a. With MPP compound, resistant levels of the Joam, Suweon, and Echeon strains of C. suppressalis were from 2 to 4 times as compared with the Yangpyong strain. b. With MEP insecticide, resistant levels of the Kimpo, Pyongtaek, Yongin, Echeon, Suweon, and Joam strains of C. suppressalis were from 2 to 6 times as compared with the Yangpyong strain. c. With Diazinon, resistant levels of the Suweon strain of C. suppressalis were 3 times greater than the Yangpyong strain ; but the resistant levels of Kimpo, Pyongtaek, Yongin, and Echeon strains approximated the later. d. The overwintered larvae of C. suppressalis were more tolerant to the insecticides than the larvae reared in the lab. e. With MEP, resistant levels of the Iri, Milyang, and Pyongtaek strains of N. cincticeps to the Suweon strain showed 13, 8, 7 and 4 times, respectively. f, With MPP, resistant levels of the Iri and Pyongtaek strains of N. cincticeps were 7 and 4 times as compared with the Suweon strain, respectively. g. With NAC, resistant levels of the several strains of N. cincticeps showed no difference, and seemed not to have developed resistance yet.