【摘要】 研究表明:新疆一代亚洲玉米螟成虫产卵盛期应用球孢白僵菌75～120g/hm2灌心或120～180g/hm2喷雾,防效相当或优于3%呋喃丹37.5～45.0kg/hm2。螟黄赤眼蜂防治新疆二代亚洲玉米螟效果优于松毛虫赤眼蜂,放蜂量为60万～120万头/hm2,放蜂3～4次,公顷设45～90个放蜂点,放蜂间隔3～5d,其卵块寄生率为56.2%～95.6%,平均65.45%;卵粒寄生率为33.7%～72.1%,平均55.1%;虫口减退率为35.7%～88.2%,平均62.0%。放蜂技术、蜂卡质量、田间小气候和化学农药等对放蜂效果影响较大。更多还原

【Abstract】 Studies on harmless control of Ostrinia furnacalis in maize field were carried out from 1999 to 2003 in Xinjiang.The result showed as following: efficiacies of Beauvria bassiana(2×108 spore per gram) when sprayed at dosage of range from 120 g to180 g per hectare and when filled at dosage of range from 75g to120 g per hectare are better than or similar to that of 37.5 - 45 kg 3% Furadan per hectare at the egg period of the first generation of Ostrinia furnacalis; The efficacy of releaseing Trichogramma chilolis ishii to control the second generation of Ostrinia furnacalis was better than that of T. dendrolimi Matsumurg. Under condition of 3 or 4 times releases and 0.6 - 1.2 million T. chilolis ishii per hectare per release at 3 d or 5 d interval, Parasitism rate of T. chilolis ishii ranged from 33.7% to 72.1 %, with averaged parasitism reached 55.1% and the larval descity was reduced by 35.7% to 88.2%, its averaged at 62.0%. The efficacyof releasing T. chilolis ishii was significantly influenced by many factors such as release techniques, product quality, pesticides and micro-climate of field.更多还原