信阳茶区茶黄毒蛾生物学特性研究

Study on Biological Characteristics of Euproctis pseudoconspersa (Strand) in Xinyang Tea Region

[目的]为茶黄毒蛾的针对性防治提供理论依据。[方法]根据荼黄毒蛾的生物学特性，分析了其在信阳茶区的为害特点，并提出了相应的防治措施。[结果]茶黄毒蛾在信阳荼区1年发生3代，幼虫为害期为5月上中旬、6月下旬。7月上旬、8月中下旬～9月。1～2龄幼虫聚集在叶背取食叶肉，3龄后幼虫分群迁散为害荼丛上部叶片，为害严重时可将茶树老叶、芽叶、嫩梢、花果全部食光。害虫防治措施有农业防治：及时修剪茶树、清理茶园，控制氮肥用量，提高茶树抗病虫能力；物理防治：人工捕捉1～3龄幼虫，用黑光灯或性激素诱杀成虫等；化学防治：选用高效、低毒、低残留农药，轮换用药，防止害虫产生抗药性。[结论]生产中应根据具体情况采取相应的防治措施。

[Objective] The study was to provide the theoretical basis for appropriate contml of Euproctis pseudoconspersa （Strand）. [Method] According to the biological characteristics of E. pseudoconspersa ,the infestation characteristics of E. pseudoconspersa in Xinyang tea region was analyzed and the corresponding contml measures on it were put forward. [Result] . Epseudoconspersa occurred 3 generations per year in Xinyang tea region and the larvae damage stage was upper and middle ten-day of May, last ten-day of June-upper ten-day of July, middle and last ten-day of August-September.The 1 - 2 instars larvae gathered on the back of leaf and ate leaf meat .The larva bigger than 3 instars dispersed and damaged the upper leaves of tea. When the damage was serious, the old leaf, bud leaf, young shoot, flower and fruit all could be eat up. The contml measures on E. pseudoconspersa including agricultural contml （promptly pruning tea tree and clear tea garden, controlling nitrogen amount to increase the resistance of tea tree to diseqse and insect） ,physical control （artificially capturing 1？ 3 instars larvae and killing imago with black light lamp or sex hormone） and chemical contml （selecting pesticides with high efficient, low toxicity and residue, and alternatively using pesticide to prevent the resistance of insect to pesticide） . [Conclusion] In tea production, the control measures on E. pseudoconspersa should be taken according to the specific condition.