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银杉牌天然杀虫剂是中国科学院植物所从多种植物中提取的多元复合天然杀虫剂,对多种蚜虫、菜青虫、红蜘蛛等害虫有较好的防效。已在河北、河南等省及日本进行试验、示范,取得较好的效果。1993年我市在延庆、昌平、大兴、通县及南郊农场,进行了近千亩防治小麦蚜虫的试验示范,取得很好的防效。结果简报如下:1 防治效果试验示范于5月11日至25日之间进行。田间麦长管蚜量百茎(穗)6000头左右,银杉牌天然杀虫剂用3个浓度:1000倍液(亩用药量15ml)、800倍液(亩用药量20ml、1500倍液(亩用药量30ml),大兴县调查药后
Yinshan brand natural pesticides is a multi-compound natural insecticide extracted from a variety of plants by Institute of Botany, Chinese Academy of Sciences and has good control effects on many kinds of pests such as aphids, cabbage caterpillars and spider mites. Has been in Hebei, Henan and other provinces and Japan to test, demonstrate, and achieved good results. In 1993, the city of Yanqing, Changping, Daxing, Tong County and the southern suburbs of the farm, carried out nearly a thousand acres of wheat aphid control demonstration and achieved good control effect. The results of the briefing are as follows: 1 prevention and control test demonstration conducted from May 11 to 25 between. Field wheat aphid amount of stems and hundreds of stems (spike) about 6000, natural silver insecticides with three concentrations: 1000 times the liquid (mu dose 15ml), 800 times the liquid (mu dosage 20ml, 1500 times the liquid Mu dose 30ml), Daxing County, after investigating the drug