论文部分内容阅读
我市丘陵地区的马尾松林,几乎年年都有松毛虫发生,轻则受害,重则成灾。在“以菌治虫”取得成果的基础上,最近几年,开展了赤眼蜂防治松毛虫的试验。1978年,在本所周围第一代松毛虫卵期放蜂治虫500亩,平均寄生率62.2～92.95％。第二代松毛虫卵期放蜂治虫210亩,平均寄生率75～81％,取得了较好的效果。在放蜂区,基本抑制了松毛虫的大发生。几年的实践证明,利用赤眼蜂防治松毛虫主要优点有:(一)繁殖赤眼蜂的工艺简单,生产方便,掌握了繁蜂技术,就可以利用简单设备大量繁殖利用;(二)使用简便,成本低,
Pinus massoniana forests in the hilly areas of the city, pine caterpillars occur almost every year, ranging from the victims, while the disaster. On the basis of the achievements of “controlling bacteria by bacteria”, in recent years, Trichogramma was tested against pine caterpillars. In 1978, 500 mu of bee-eaters were released in the first generation of dendrolimus eggs around the institute, with an average parasitic rate of 62.2-92.95%. The second generation of dendrolimus egg stage put the beeswax 210 acres, the average parasitic rate of 75 to 81%, and achieved good results. In the bee area, the basic suppression of the occurrence of pine caterpillars. Several years of practice have proved that the main advantages of Trichogramma were: (1) The process of breeding Trichogramma is simple and convenient in production. Mastering the technique of bumblebee, it can be multiplied and utilized by simple equipment; (2) Simple, low cost,