摘要
使用赤眼蜂防治果树害虫掌握最佳的释放比例,既能提高防治效果,又能降低防治成本。试验从周期性调查释放赤眼蜂自然形成的种群密度入手,研究赤眼蜂种群密度与寄主卵密度之间的关系。结果表明：当每棵果树上释放的松毛虫赤眼蜂雌蜂数量与寄主卵比例达到150∶1时,达到最佳防治效果,为85%～88%。
To master optimal release proportion could both increase the effect and decrease the cost by making use of the trichogramma to prevent and cure the pests of fruit trees. The relation between the density of the population of the trichogramma and the density of eggs of the host was studied by surveying periodically the density of the population of trichogramma, which formed naturally by releasing the trichogramma. The results showed that when the ratio of trichogramma and density of eggs of the host was 150 ： 1, the effect could reach 85%～88%.
出处
《黑龙江农业科学》
2007年第6期56-57,共2页
Heilongjiang Agricultural Sciences
关键词
赤眼蜂
释放比例
生物防治
果园
trichogramma
releasing ratio
biological prevent and cure
orchard
