秦岭杏园桃蛀果蛾的发生规律研究

Seasonal History of Carposina sasakii Matsumura on Apricot Orchard in Qinling Mountain Region, Shaanxi

采用田间性诱芯诱蛾、虫果调查以及自然变温条件下越冬幼虫出土和成虫羽化观察相结合等方法，研究了桃蛀果蛾ＣａｒｐｏｓｉｎａｓａｓａｋｉＭａｔｓｕｍｕｒａ在陕西秦岭山区杏树Ｐｒｕｎｕｓａｒｍｅｎｉａｃａ上的发生规律和危害情况。结果表明，桃蛀果蛾在杏园一年发生１代，以老熟幼虫在土中结圆茧滞育越冬。越冬幼虫４月中旬开始出土，４月中旬末至４月下旬为出土盛期；成虫于５月上旬始见，５月中旬达到羽化盛期；老熟幼虫于６月１０日前后开始脱果，６月中旬为脱果高峰。幼虫老熟脱果后，在土中结圆茧进入滞育状态越夏、越冬。

The seasonal history of the peach fruit borer, Carposina sasakii Matsumura,and its damage to apricot, Prunus armeniaca ,were investigated in apricot orchards in Qinling Mountainous Region from 1993 to 1997. The results show that Carposina sasakii completes one generation per year in mountainous apricot orchard. The overwintered larvae emerged out of ground from mid April to early May. The moths fly from early to end of May. The eggs were deposited on young apricot fruit from early May to early June. The grown larvae emerged out of the fruit and drop to ground from early to mid June. Almost all the larvae coming out from apricots enter diapause in rounded cocoons in soil. The suitable time to control the pest should be mid to late May when it is in egg stage and the larvae just hatch from eggs.