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双弓黄毒蛾Euproctis diploxutha Collenette是我省一种较常见的果树林木害虫,其生物学特性经1981—1982年在南昌郊区的调查和饲养观察,已经基本查清,现逐项分述如下: 1.食性主要取食植物有:苦莓、玖瑰、金樱子、蔷薇、月季、李、梅、茅粟、板栗、狼把草、扛板归,还见取食梨、糖梨、麻栎、榆、乌桕、桃、枇把、山桦、算盘子、毛白檀、蓖麻、小麦、花生、绿豆、南瓜、大豆、丁香蓼、拔葜等。2.代数和发生期一年发生3—4代,4代为主,世代重叠。以4—6龄幼虫在枯枝落叶、草丛根际等处越冬。次年3月下旬开始活动取食,4月中旬—5月上旬结茧化蛹,4月底—5月下旬羽化,5月上旬—6月初产卵。第1代幼虫5月中旬—6月上旬
Euproctis diploxutha Collenette is one of the more common pests of fruit trees in our province. Its biological characteristics have been basically ascertained through the investigation and rearing observation in the suburbs of Nanchang from 1981 to 1982, which are described as follows: 1 The main food - eating plants are: Chrysanthemum, Rose, Rosa laevigata, rose, rose, plum, plum, chestnut, wolf grass, carry plate, see also eat pear, pear, oak, Ulmus, walnuts, peach, loquat, birch, abacus, white sandalwood, castor, wheat, peanuts, mung beans, pumpkin, soybeans, Polygonum, unpolished and so on. Algebra and the occurrence of occurrence of 3-4 generations a year, 4 generation-based, overlapping generations. 4-6 instar larvae in the litter, grass rhizosphere overwintering. In the following year, the activity begins to take effect in late March. From mid-April to early May, cocoon pupation occurs, from the end of April to the end of May, and from early May to early June. The first generation of larvae from mid-May to early June