Abstract
This study was conducted to obtain basic data for deriving the appropriate application amount of insecticide for effective pest control. We have investigated the correlation among the application amount of insecticide, the adhesion amount of active ingredient and the pest control effect. The linear standard curve of acetamiprid was $R^2=0.9994$, and the scope of the recovery factor was between 71% and 93% with less than 6% of the coefficient of variation. During the test conducted in 2015, the application amount was reduced to 302 L/10a which was 70 L less than the previous year and the spraying pressure was reduced as well. After analyzing the adhesion amount of active ingredient, it was found that a correlation coefficient of adhesion amount of the active ingredients became lower from 82% to 69%, that indicated insecticide liquid was evenly distributed compared to 2014. Also more than 95% of control effect was displayed, thereby indicating that there is a close relation with the correlation coefficient of the adhesion amount of active ingredient. It also presented that the adhesion amount of active ingredient on the ground was 2.2 times more than that on the leaves of apple trees.
본 연구는 농약 살포량과 유효성분의 부착량 그리고 해충방제 효과와의 상관관계를 조사하여 효율적 해충방제를 위한 적정 농약 살포량을 도출하는 기초 자료를 얻고자 실시되었다. 시험약제의 유효성분인 acetamiprid의 표준검량선의 직선성 $R^2=0.9994$, 회수율 71~93%, 변이계수 6% 이하로 농약 잔류분석기준에 적합하였다. 2015년도 실험에서는 살포량을 전년도보다 70 L 감량한 302 L/10a로하고 살포압을 낮추어 살포한 후 유효성분의 부착량을 비교 분석한 결과, 부착량의 상관계수가 82%에서 69%로 낮게 조사되어 전년도에 비해 고르게 살포되었음 알 수 있었다. 약제 살포량을 줄였음에도 해충에 대한 방제가가 95%이상 우수한 것으로 나타나, 유효성분 부착량의 상관계수와 밀접한 관계가 있는 것으로 보여 진다. 또한 사과원 토양 표면의 유효성분 부착량을 분석한 결과 과수에 부착되는 양과 비교해 2.2배까지 높게 부착되는 것으로 분석되었다.
