과수 화상병 방제약제의 사과·배 생육기 연용 살포에 의한 약해
Pytotoxicity by Continuous Spraying of Fruit Fire Blight Disinfectant During Growing Season of Apple and Pear
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초록
과수 화상병을 방제하기 위해 발병 초기에 과수원 반경 내 전체 식물을 제거하거나 예방을 위해 약제 방제를 시행하고 있다. 과수에 대한 항생제 사용이 시작된 이후, 항생제 저항성 병원균발생 가능성과 의도하지 않은 수체 및환경에 대한 해로운 영향이 문제가 되고 있다. 본 연구의 목적은 화상병 방제약제 과다살포로 인한 과수의 피해 정도를 확인하고, 안전한 약제 방제 기준을 설정하기 위해 수행하였다. 과수 생육기 동안 안전 사용 횟수를 초과하여 3종의 과수 화상병 방제약제를 지속해서 살포하였을 때 발생하는 약해와 처리한 과실에서 약제 잔류허용기준초과 여부를 분석하였다. 사과 ‘후지’와 배 ‘신고’에서 약해는 보이지 않았고, 무대재배를 한 ‘후지’에서 oxolinic acid가 정량한계를 넘어서 검출되었고, 나머지 약제 성분은 잔류허용기준 이하로 검출되었다. 안전 사용 횟수를 초과하여 방제약제를 사용하게 되면 약제 성분이 과실에 남을 수 있으므로 정해진 희석배수를 지키고 안전 사용 횟수와 함께 사용 적기를 반드시 준수해야 함을 알 수 있다.
Abstract
In order to control the fire blight disease, all plants within the radius of the diseased orchard were removed in the early stage of the outbreak, or antibiotics control was performed for prevention. Since the beginning of antibiotics use on plants, the potential for development of resistance to antibiotics by the plant pathogen and unintended detrimental effects on the fruit trees and environment has become a problem. The purpose of this study is to determine the degree of phytotoxicity to fruit trees caused by excessive spraying of the fire blight disease disinfectant and to establish basic data for safe disinfectant guide. We analyzed whether damage to the fruit tree and the maximum residual limit of fruit was exceeded when three kinds of the fire blight disease disinfectants were continuously sprayed in excess of the number of safe use during the growing season. There was no phytotoxicity in apple ‘Fuji’ and pear ‘Niitaka’, and oxolinic acid was detected beyond the limit of quantitation in 'Fuji' grown without a bag, and the other disinfectants were detected below the maximum residue limit. When these disinfectants are continuously sprayed in excess of the number of safe, phytotoxicity may remain on the fruit. Therefore, it is necessary to observe the prescribed dilution factor and observe the safe frequency and the timing of use.
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