2.After 24 hours, the landing rate of aphids on the treated and control leave surfaces were 20 6% and 79 4% respectively. The antifeeding effect was 74 04%, AFC 50 =(4 055±0 0215)g/L. The regression equation is Y=9 115+1 719X.
3.Secondly, on account of the strong southwest current which occurred at the west side of the subtropical high and dynamic effect of the typhoon itself, the landing northward tropical cyclone (9711) landed in Liaoning again.
