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在林间连续四年十次释放不同蜂量的松毛虫赤眼蜂Trichogramma dendroli-mi Matsumura防治第一代马尾松毛虫Dendrolimus punctatus Walker,结果表明,当害虫卵块密度在1.0块/株以下时的效果是显著的,每公顷放蜂量15—60万头较合适,但林间释放赤眼蜂持续效果较差。
Trichogramma dendroli-mi Matsumura (Trichogramma dendroli-mi Matsumura), the first generation Dendrolimus punctatus Walker, was released in the forest for ten consecutive four years. The results showed that when the density of pests was less than 1.0 per plant Is significant. It is more appropriate to release 15-60 000 bee per hectare, but the continuous removal of Trichogramma from the forest is less effective.