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本文描述茶小卷叶蛾幼虫分龄和卵、蛹分级的形态特征及其在不同温度下的历期,作为发育进度预测的依据。阐明其危害对茶叶品质和产量的显著影响。虫口(头/丛)与鲜叶产量损失(kg/亩)的关系式为:y=10.441gx-5.84。按当地鲜叶价格,虫口(头/丛)与经济损失(元/亩)的关系式为:(?)=5.61gx-2.92。平均每丛虫口6—7头达经济阈限。考虑兼顾经济效益与生态效益,防治指标宜在每丛10头以上。查明天敌20余种,以蜘蛛、赤眼蜂为主,卷叶蛾茧蜂更常具有比较显著的自然控制效应。在防治上,卵期繁放赤眼蜂,幼虫盛孵后进行茶叶采摘,喷施白僵菌,都可收到良好防治效果。综合防治中必须化防时,挑治、片治,合理用药,显著增长了自然天敌对害虫的生态控制。
This paper describes the morphological characteristics of the larvae of Plutella xylostella larvae and the classification of their eggs and pupae at different temperatures as the basis for the prediction of their developmental progress. Clarify the significant impact of harm on tea quality and yield. Insect mouth (head / plexus) and fresh leaf yield loss (kg / acre) relationship as follows: y = 10.441gx-5.84. According to the local fresh leaf price, the relationship between insect population (head / clump) and economic loss (yuan / mu) is: (?) = 5.61gx-2.92. An average of 6-7 heads per insect population reached the economic threshold. Consideration of both economic and ecological benefits, prevention and control indicators should be more than 10 per bundle. More than 20 species of natural enemies were identified, dominated by spiders and trichogramma, and the leaf beetle had more significant natural control effects. In the prevention and treatment, Trichogramma was planted in the egg stage. After the larvae were hatched, tea picking and spraying Beauveria bassiana could all be well controlled. Comprehensive prevention and control must take the prevention and control, pick and rule, cure, and rational use of drugs, significantly increased the ecological control of natural enemies of pests.