小規模ガラス温室におけるギフアブラバチ放飼によるモモアカアブラムシの密度抑制効果

概要

論文の詳細を見る
Aphidius gifuensis Ashmead were released on qing-geng-cai plants infested with Myzus persicae (Sulzer) in small experimental greenhouses. Experiments were conducted from September to October 2000 (Trial 1), from November to December 2000 (Trial 2) and from April to May 2001 (Trial 3). Three, six and one adult aphids per plant were introduced on the first days of trials 1, 2 and 3, respectively. Each trial consisted of three treatments : four-time releases of one female and one male adult parasitoid per plant with 7-day-intervals in Greenhouse A, four-tirme releases of one female and one male per plant with 3-day-intervals in Greenhouse B and a single release of four females and four males per plant in Greenhouse C. In Trial 1, aphid populations were suppressed in all of the greenhouses although they increased by 28.3 per plant in Greenhouse A, 58.0 in Greenhouse B and 117.1 in Greenhouse C on day 17 after the trials started. Trial 2 resulted in an exponential increase of the aphid populations in all of the greenhouses. In Trial 3, the aphid population was controlled only in Greenhouse B. These results show that A. gifuensis can be an effective natural enemy to control the M. persicae population in greenhouses. The effects of release frequency and interval of A. gifuensis, and the initial density of the aphid population on the performance of parasitoids were discussed.
日本応用動物昆虫学会の論文
2005-05-25