잎들깨에서 차먼지응애에 대한 천연 피레스럼 방제효과

국문 초록 (Abstract)

시설잎들깨에 발생하는 차먼지응애를 친환경적으로 방제하고자 피레스럼(pyrethrum)의 농도별 방제효과를 조사하였다. 2%, 4%, 6% 피레스럼 1,000배 희석액에 대한 차먼지응애 약·성충의 생충률은 약제 살포 3일 후 각각 58.1%, 27.5%, 22.7% 였으며, 5일 후 각각 73.4%, 37.3%, 30.6% 였다. 차먼지응애에 대하여 방제효과가 우수했던 6% 피레스럼 1,000배액와 화학약제인 밀베멕틴(milbemectin EC 2%) 1,000 배액을 이용하여 약제 살포 후 차먼지응애에 대한 약·성충 밀도를 지름 1cm 잎디스크 내에서 조사한 결과, 6% 피레스럼을 차먼지응애의 발생이 예측되는 시기인 5월 10일부터 10일 간격으로 사용한 곳에서 밀도가 낮게 유지된 반면 차먼지응애의 피해가 확인된 후 화학약제를 사용한 곳에 서는 1주 간격 1~2회의 살포로는 차먼지응애의 밀도를 낮출 수 없었으며 1주 간격 3회 살포 이후 밀도가 낮아졌다. 따라서, 시설잎들깨에서 효과 적으로 차먼지응애를 방제하기 위해서는 발생이 예측되는 초기부터 방제제를 사용하는 것이 효과적이다.

다국어 초록 (Multilingual Abstract)

We investigated an ecologically-sensitive method to control Polyphagotarsonemus latus in a green perilla polyvinyl house using concentrated pyrethrum. The survival rates of Polyphagotarsonemus latus nymphs and adults to 2%, 4%, and 6% pyrethrum 3 days after spraying were 58.1%, 27.5%, and 22.7% respectively, and 73.4%, 37.3%, and 30.6% at 5 days after spraying. These results show that the most effective control occurred using 6% pyrethrum. To investigating the densities of P. latus on a 1 cm diameter leaf-disk of green perilla, we sprayed the leaf every 10 days from May 10 with 6% pyrethrum 1,000 times and milbemectin EC 2% 1,000 times. The period chosen was one where the incidence of P. latus could be predicted. The density was kept low during the treatment period. However, if leaf damage had already occurred from P. latus, the density could not be decreased by spraying 1 or 2 times each week where milbemectin EC 2% was used, but the population could be reduced when sprayed 3 times. Therefore, in order to effectively control P. latus in green perilla greenhouses, it is important to begin treatment at an early stage when P. latus are first observed.

목차 (Table of Contents)

• ABSTRACT
• 초 록
• 재료 및 방법
• 결과 및 고찰
• Literature Cited

참고문헌 (Reference)

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