茶黑毒蛾的发生规律与预测预报

The population dynamics and prediction of tea black tussock,Dasychira baibarana(Matsumura)

2010-2012年对云南省普洱市茶黑毒蛾Dasychira baibarana Matsumura的发生规律开展了系统调查,结果表明,茶黑毒蛾在云南普洱市一年发生5代,6-10月为茶黑毒蛾幼虫的发生高峰期,3-4代为主害代。茶黑毒蛾幼虫历期以第1代最长,平均33-34 d,其次是第5代,平均为26 d。第2、3、4代幼虫历期为20-21 d。7-9月为茶黑毒蛾成虫的主要发生期。此外,研究发现,根据茶园茶黑毒蛾的发蛾高峰日,采用历期法预测防治时期基本可行,可按照预测的时间进行防治或适当提前进行防治。

From 2010 to 2012, systematic investigation of Dasychira baibarana was carried out in tea field of Yunnan Puer. It has been found that D. baibarana occurred five generations a year in this area. The high peak period of larvae of D. baibarana took place from June to October,and the third and fourth generation were the major pestilent generation moths. The longest development duration of larvae of D. baibarana was the 1st generation,which was 33-34 d at average;The second was the fifth generation,which was 26 d at average. And the development duration of larvae of the second, third and fourth generation were between 20 and 21 d. The high peak period of adult of D. baibarana took place from July to September. Furthermore, it was found the peak of emergence of adult of D baibarana could predict the optimum control stage by means of periodic distance, and the larvae of D. baibarana were controlled in accordance with the prediction of the time or ahead of the time.