Pesticide residues in rice straw for livestock feed

사료용(飼料用) 볏짚중(中)의 농약(農藥) 잔류량(殘留量)

In order to clarify the possible contamination of rice straw used as a crude feed for livestock, Korean native cattle and cow, by pesticides, the samples collected from 21 sites in Korea were analyzed by a multiresidue method for 10 pesticides with GLC to obtain the following results. 1. Detection limits were 0.001ppm in butachlor, 0.002ppm in chlorpyrifos, 0.003ppm in BPMC, pirimiphos-methyl and diazinon, 0.004ppm in fenitrothion, 0.005ppm in phenthoate, 0.009ppm in IBP, 0.015ppm in carbofuran, and 0.03ppm in carbaryl. 2. In recovery tests, 73-101% of the pesticides applied were recovered, the recovery being low in carbofuran and chlorpyrifos. 3. Butachlor, 2-chloroacetanilide herbicide, and BPMC, carbaryl, and carbofuran, carbamate insecticides, were not detected in any sample. 4. In organophosphorus insecticides, the amounts of fenitrothion in sample No. 1, 2, 4, 5, 7, 12, 20 and 21 were in the range of 0.01-0.05ppm, those of phenthoate detected in sample No. 10 and 12 were 0.4 and 0.17ppm, respectively, and those of IBP in all samples, with the exception of sample No. 7, 12, 16, 17, 20, and 21, were in the range of 0.01-0.20ppm. The residues of chlorpyrifos, diazinon, and pirimiphos-methyl were not detected.

한우 및 젖소의 조사료로 다량 사용되고 있는 볏짚의 농약에 의한 오염 여부를 판단하기 위하여 전국에서 21지점을 선정하여 시료를 수집한 후 GLC를 이용한 다중분석법으로 10종의 농약에 대하여 조사한 결과는 다음과 같다. 1. 검출한계는 butachlor가 0.001ppm, chlorpyrifos는 0.002ppm, BPMC와 pirimiphos-methyl 및 diazinon이 0.003ppm, fenitrothion은 0.004ppm, phenthoate는 0.005ppm, IBP는 0.009ppm, carbofuran은 0.015ppm, carbaryl은 0.03ppm이었다. 2. 회수율은 평균 약 73-101%였으나 carbofuran과 chlorpyrifos에서는 낮았다. 3. 2-chloroacetanilide계 제초제인 butachlor와 carbamate계 살충제인 BPMC, carbaryl, carbofuran은 검출되지 않았다. 4. 유기인계 살충제중 fenitrothion은 시료번호 1, 2, 4, 5, 7, 12, 20, 21에서 0.01-0.05ppm 검출되었고, phenthoate는 시료번호 10과 12에서 각각 0.40ppm과 0.17ppm, IBP는 시료번호 7, 12, 16, 17, 20, 21을 제외한 모든 시료에서 0.01-0.2ppm 검출되었으나 chlorpyrifos, diazinon, pirimiphos-methyl은 검출되지 않았다.