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为了充分开发利用铁倍资源,在无倍区发展铁倍生产,于1988—1990年进行了扩大铁倍产区的试验研究。结果表明:1.铁倍蚜在没有第1寄主存在的地区,可以在第2寄主上进行宿存繁衍;2.当年定植的红麸杨新梢萌动期与蚜虫迁飞期不相吻合,物候滞后,当年不结倍,第2、3年结倍株数和结倍数逐年增加。在有第2寄主和倍蚜虫存在的地区,只要补植第1寄主,无倍区完全可以变成产倍区。
In order to fully exploit and utilize the timeslots resources and develop the iron times production in the no timeslot, pilot studies on expanding iron times production areas were carried out in 1988-1990. The results showed as follows: 1. In the area without the first host, the double-aphid could survive on the second host; 2.The shoots of red bran and young shoots planted in that year did not coincide with the aphid migration period, Hysteresis, the year did not end times, the first 2, 3 times the number of trees and knot multiplier increased year by year. In the presence of the second host and times aphids in the area, as long as the first host replantation, no fold area can be completely converted to producing area.