冀西北地区张杂谷害虫发生特点与综合防治技术

摘要

张杂谷是冀西北地区主要种植作物，为保障其丰产丰收，采用五点取样法对该地区种植示范区的害虫种类及发生特点进行了调查。结果表明：谷子苗期主要害虫有粟叶甲、粟凹胫跳甲、粟灰螟和叶螨类；成株期主要害虫有双斑萤叶甲、粟缘蝽、大青叶蝉等。其中粟叶甲1年发生1代，成虫、幼虫均啃食叶肉，形成条斑，为害最为严重。其次粟凹胫跳甲1年发生2代，直接取食掉幼苗顶心，形成“坐苗”。张杂谷害虫种类不多，但为害严重，综合防治技术以农业防治为辅，化学防治为主。%To protect rich harvest of Zhangzagu millet,a major crop in northwest Hebei,pest species and occurrence characteristics were investigated with the five-point-survey method at Hybrid Millet cultiva-tion demonstration zone in northwest Hebei. The results showed that Oulema tristis,Chaetocnema ingénue and Chilo infuscatellus occurred at seedling stage, but Monolepta hieroglyphica (Motschul-sky),Liorhyssus hyalinus and Cicadellaviridis at adult plant stage.Oulematristis occurred for one gen-eration in a year and adults or larvae causing most serious harm by eating the mesophyll. The second is that Chaetocnemaingénue occurred for two generations in a year,feeding off the seedling centers directly. Pests on Zhangzagu are of only a few types,but may cause serious damage.So the priority of the synthet-ical control techniques should be given to chemical,with assistance of agricultural techniques.