Preliminary Report of Steeps from Insect Resistant TransgenicCotton for Controlling Clostera anastomosis
By rinsing, airing, comminuting, soaking, squeezing and filtrating the leaves, stems, roots and seeds from insect resistant transgenic cotton, the steeps were prepared.Experiments for controlling 3~(rd) instar larvae of Clostera anastomosis were conducted.The results showed that the steeps from 100 g fresh leaves dregs with 60 mL water and 30 g dry leaves powder with 60 mL water had good results on Clostera anastomosis control with mortalities of 93.3 % and 100%, respectively, in 2 hours. The mortalities of Clostera anastomosis were 76 % and 88%, respectively, in 5 days by the field willow treated with the steeps from 1000 g dry leaves powder with 5000 mL water and 1000g seed powder with 5000 mL water, respectively.