一、利用赤眼蜂防治甘蔗螟虫的优点 甘蔗是我国重要糖料作物,分布在华南、西南、华中等地区。据各地资料,甘蔗螟虫普遍和严重发生,威胁甘蔗生产甚大。 从甘蔗生长特性和蔗螟发生规律来看,人工繁殖蔗螟天敌赤眼卵蜂来防治甘蔗螟虫,是一个经济而有效的方法。据广东各地近几年来试验,示范及大面积应用的结果,可以看出:利用赤眼蜂防治蔗螟,可以显著提高螟卵寄生率,减少枯心苗和虫蛀节,从而可以提高甘蔗的产量和质量。例如1956年在广州市郊河南农场进行大面积试验,用413亩蔗田放蜂,225亩作对照,放蜂区每亩设2—3个放蜂器,全年放蜂11次,每次每 First, the use of Trichogramma stem cane stem advantages of sugar cane is an important sugar crops in China, located in South China, Southwest China and Central China. According to local sources, sugarcane borers are widespread and serious, threatening the production of sugarcane. From the characteristics of sugarcane growth and the occurrence of sugarcane borer, it is an economical and effective way to plant sugarcane borer by artificially propagating its natural enemy Eichhornia crassipes. According to the results of experiments, demonstrations and large-area application in various places in Guangdong in recent years, it can be seen that the prevention and control of sugarcane with Trichogramma can significantly increase the parasitism rate of cucumber eggs and reduce the dead-heart seedlings and moth sections, Yield and quality. For example, in 1956, a large-scale trial was carried out in the farms of Henan in the suburbs of Guangzhou. In 413 mu of sugarcane fields, 225 mu of beehive was used as a control. Putting two or three bee-