机油乳剂防治策略对柑橘园害虫天敌群落结构与动态的影响

Effects of petroleum spray oils control programs on the structure and dynamics of pest natural enemies communities in citrus orchard.

不同防治策略对果园害虫天敌群落的影响试验结果表明,与果农常规防治策略(主要使用化学合成农药防治害虫)试区相比,机油乳剂防治策略(主要使用机油乳剂防治害虫)试区柑橘害虫天敌群落丰富度较高,且随该防治策略的继续实施而进一步逐年提高,天敌群落均匀度指数较稳定,而天敌群落多样性指数则无明显变化。

Effects of petroleum spray oils (PSO) control program (i.e. applying PSO mainly for pests management) and the farmer control program (i.e. applying chemosynthesis pesticides mainly) on the structure and dynamics of pest natural enemies communities in citrus orchard were studied in Huangyan, Zhejiang Province from Aug. 1997 to Jun. 2000. The results show that the natural enemies communities are more abundant observably and the evenness index of the communities is more stable for PSO control program than for the farmer control program. The abundance of natural enemies communities increases year by year for PSO control program, but the diversity index of the communities is basically uniform.