两色绿刺蛾生物学特性及发生规律

两色绿刺蛾在福建闽西北1a发生2代，以老熟幼虫在土壤中结茧越冬。该虫1a有2次发生高峰期，分别在6月上、中旬和9月下旬至10月上旬。以第1代发生量大，危害严重。该虫发生与竹林结构、竹立量、坡向、坡位均有关系。林间调查表明：该虫第2代的天敌寄生率高。天敌是抑制种群数量增长的重要因素之一。

The biological characteristics and occurring rule of Latoia bicolor

Latoia bicolor (Walker) has 2 generations each year and overwinters with old larvae inside cocoons in the soil. There are two peaks of occurrence during the first twenty days of June, and from the last ten days of September to the first ten days of October. The damage of the 1st generation is the most serious. The populations of the pest are related with the structure of bamboo stand, bamboo density, aspect, slope site. Through investigation the parasitic rate of natural enemy is very high in the 2nd generation. Natural enemies is one of the important factors to control the populations of the pest.