Abstract
4월부터 6월까지 수박을 재배하며 콜레마니진디벌을 이용하여 목화진딧물 밀도억제효과를 조사하였다. 목화진딧물 방제를 위하여 콜레마니진디벌를 <TEX>$m^2$</TEX>당 2마리씩 3회(4월 24일, 5월 8일, 5월 22일) 방사한 결과 목화진딧물 밀도는 잎당 0.6마리 이하로 억제되었고, 최고 기생률은 57.2%이었다, 진딧물 발생엽률은 2.0~10.6% 이었다. 무방사구에서 목화진딧물의 밀도는 5월 초부터 증가하여 5월 29일에는 잎당 653.2마리까지 증가하였다. Biological control of Aphis gossypii by natural enemies was carried out in watermelon from April to June. Aphidius colemani was released 3 times at rate of <TEX>$2/m^2$</TEX> to control A. gossypii(April 24, May 8, and May 22 in 2007). In A. colemani-released plots, A. gossypii showed low population density of < 0.6 per leaf with the highest parasitism of 57.2%, and 2.0~10.6% in the percentage of leaves with aphids. In control, the population of A. gossypii kept on increasing from early May and reached 653.2/leaf on may 29.
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