桔小实蝇在柑桔园的防治指标

运用田间罩笼法在明确桔小实蝇释放量与柑桔损失率、释放量与诱捕量之间的关系基础上，推导出诱捕量与损失率之间的关系，并建立了桔小实蝇防治指标模型，以台州市温州蜜橘的最低售价及防治成本等参数得出桔小实蝇在柑桔园相对每棵柑桔的防治指标为2.2头。

The Economic Threshold of the Bactrocera dorsalis (Hendel) in Citrus Orchard

The economic threshold of the oriental fruit fly, Bactrocera dorsalis (Hendel), in citrus orchard was studied. The correlative among oriental fruit fly release amount, loss rate of citrus yield and oriental fruit fly release amount and trap amount were studied by release oriental fruit flies inside five cages in the field. Then we deduced the relationship between oriental fruit fly trap amount and loss rate of citrus yield, and established the model of economic threshold. According to the price of Taizhou orange and the cost for control the fruit fly, the economic thresholds of oriental fruit fly in citrus orchard was 2.2 adults per tree in Taizhou.