论文部分内容阅读
粟杆蝇幼虫为害谷子常造成枯心或不实。此虫一年发生二代,部分一代。以老熟幼虫在5—10厘米土层中越冬。成虫于6月中旬出現,6月末达盛期,每雌产11—41卵,产卵于粟杆的基部。粟杆蝇的发生为害与湿度有密切关系,交尾、产卵、幼虫孵化、以及侵入粟茎均需高湿。田間枯心率与当年6月份降雨量的相关系数为0.71(P<0.01),相关显著。在晚播、高肥、密植的条件下,枯心发生严重。谷子品种、生育速度均与被害程度有关。在粟田雌蝇出現高峯期噴5%DDT与0.5%666等量混合粉剂,有良好的防治效果。
Millet bug larvae damage often caused by millet millet or false. This worm occurs second generation a year, some generations. To mature larvae in 5-10 cm soil overwintering. Adult emerged in mid-June and reached mid-June at the end of June, with 11-41 eggs per female, spawning at the base of the millet rod. The occurrence of poplar fly damage and humidity are closely related, mating, spawning, larvae hatch, as well as invade millet stems need high humidity. The correlation coefficient between dry-heart rate and rainfall in June of that year was 0.71 (P <0.01), with significant correlation. In late-sowing, high-fat, close planting conditions, withered serious. Millet varieties, fertility rates are related to the degree of victimization. Sprayed 5% DDT and 0.5% 666 mixed powder at the peak stage of female fieldworm in Atrada, have a good control effect.