石河子地区棉铃虫发生规律及药剂防治技术

Occurrence Regularity and Control Technology of Helicoverpa armigera(Hubner) in Shihezi

近年来由于种植结构和灌溉方式的调整和气候的变化,引起棉铃虫发生规律的改变。通过3年定点、定量、定时用杀虫灯、杨枝把、性诱剂诱集,以及喷雾法进行化学药剂田间药效比较,研究了棉铃虫在石河子的发生规律,比较了3种诱集技术对棉铃虫的诱集效果,筛选了适宜本地大田使用的药剂,为当地棉铃虫及时防治提供理论依据。结果表明:在石河子地区,越冬代成虫羽化始期在5月上旬,高峰期在5月下旬。1代成虫6月中旬开始羽化,羽化高峰期为6月22日—7月2日,2代成虫羽化期在7月中下旬,羽化高峰期7月22日—8月3日。通过3种诱集法比较,越冬代性诱剂监测、1代成虫用性诱剂监测用杨枝把防治,2代成虫用杨枝把监测,杨枝把和灯光诱集防治效果更好。田间化学药剂比较试验结果显示美除及NPV等生物制剂对棉铃虫防治效果较好。

The occurrence regularity of Helicoverpa armigera has changed in recent years because of the adjustment of cultivation structure and irrigation regimes as well as climatic changes. This study was aimed to provide theoretical basis for the timely control of Helicoverpa armigera. In 2008-2011, occurrence regularity of Helicoverpa armigera was studied through trapping with insect killer lamp, withered poplar branches（WPB） and sex attractant. Also efficiency of this three trapping techniques to Helicoverpa armigera was compared. Chemical pesticides which were suitable for the locality were screened by field efficacy trials. The results showed that, eclosion of the overwintering generation adults happened in early May and reach peak in late May in Shihezi. The adults of first generation occurred in mid-June and the peak appeared from June 22 to July 2, the second generation happened in mid-to-late July and from July 22 to August 3 respectively. In addition, the results demonstrated that monitoring the overwintering generation and adults of first generation by using sex attractant was effective, WPB could control adults of first generation; adults of second generation could be monitored by WPB, the efficiency of WPB and light trapping to manage the adults was better. Results of field efficacy trials indicated that bio-agent including Lufenuron and NPV had a good control effect against Helicoverpa armigera.