苘麻诱集棉铃虫的优化研究

Optimized Study of Abutilon theophrasti Trapping Helicoverpa armigera in Cotton Field

[目的]优化苘麻诱集带设置,总结苘麻诱集棉铃虫的高效方法.[方法]在北疆的石河子垦区棉田边缘设置苘麻诱集带,研究苘麻的田间布置、生长发育不同时期特点与诱集棉铃虫效果的关系.[结果]植株越高诱集效果越好,其百株苘麻落卵量大小为：40 cm以上＞31 ～40 cm ＞21 ～30 cm＞ 11 ～20 cm＞ 10 cm以下.在棉铃虫产卵不同时期,翠绿色苘麻植株谤集效果都明显好于深绿色植株.苘麻叶老化后棉铃虫产卵更偏向嫩果实.不同行宽的诱集带百株苘麻诱集的产卵量大小为：3行＞5行＞1行,总诱集量大小为：5行＞3行＞1行,诱集带越宽诱集量越大,但就其诱集带的利用效率来看以3行宽最佳.苘麻把诱集棉铃虫效果较差,表明苘麻是利用棉铃虫的视觉定向行为进行诱集棉铃虫产卵的.[结论]生产中可利用苘麻诱集棉铃虫产卵,结合化学防治来达到防治效果.

[ Objective ] The aim was to optimize the setting of A. theophrasti trapping band and summarize effective method of trapping cotton bollworms of abutilon. [ Method] Some rapping bands ofA. theophrasti were set up on the edge of cotton fields in Shihezi of northern Xinjiang, and the relation between the layout in the field, characteristics of A. theophrasti in different stage and the effect of trapping cotton bollworms were studied. [ Result] The higher the plants were, the better the trapping effects were, and the number of accumulated eggs drop more than 40 cm 〉 31 -40 cm 〉 21 -30 cm 〉 11 -20 cm 〉 less than 10 cm per 100 plants. In different periods of cotton bollworms laying, the attracting effects of emerald plants were significantly better than dark green. After ageing of the abutilon leaves, cotton bollworms were more like tender fruit to egg. the accumulated eggs of 100 abutilon were 3 lines 〉 5 lines 〉 1 line for different wide trapping band, in total, the trapping amount was 5 lines 〉 3 lines 〉 1 line. The wider the trapping band was, the higher the trapping amount was, but the 3 lines was the best width in using the trapping band. The abutilon bundle had poor trapping effect on cotton bollworms, and it showed that abutilon trapping cotton bollworms oviposition by using visual orientation behavior of H. armigera. [ Conclusion] A. theophrasti could be used to trap tl. armigera in production, combining with chemical control.