厦门市郊灌口公社顶许大队积极推广“以虫治虫”经验,利用赤眼蜂防治甘蔗螟虫,取得了显著成效。今年他们在甘蔗田放赤眼蜂七百四十四万多只,防治面积达二百四十八亩。在七月八日至十一日进行田间调查,有放蜂的蔗苗平均枯心率比采用药剂防治的降低两倍多,比不放蜂不喷药防治的降低三倍多。一、放蜂时间:新植蔗于四月十三日开始放蜂;每隔十五天左右放蜂一次,共放峰六次。宿根蔗于三月十四日开始放蜂,每隔十五天左右放蜂一次,连续放蜂八次。二、放蜂数量:每亩每次放蜂二万五千只至三万五千只,平均每亩每次放蜂三万只左右。其中新植蔗每亩共放蜂十八万只左右,宿根蔗每亩共放蜂二十四万只左右。 Xiamen Suburban Guankou commune top large battalion actively promote “insect pests ” experience, the use of Trichogramma to control sugarcane borers, and achieved remarkable results. This year they put more than 4.4 million Trichogramma beetles in the sugar cane fields, with a control area of ​​248 kilos. Field surveys conducted between July 8 and July 11 showed that the average dry spell of sugarcane plants with bee-eaters was more than double that of the control with chemical pesticides and more than tripled from that of non-spray-controlled ones. First, the release time: The new sugarcane began to put the bee on April 13; put the bee once every 15 days, a total of six times. Perennial sugarcane began to put the bee on March 14, put the bee once every 15 days and put the bee on for eight times in a row. Second, the number of bee-eaters: each time put acres twenty-five thousand to thirty-five thousand, the average per acre put about thirty thousand bees. Among them, a total of 180,000 bee-eaters of new sugarcane were put together per hectare and a total of 240,000 bee-eaters were stored per hectare of sugarcane.