Abstract:

In order to compare the control effect of 20% cyproflanilide suspension on the Chilo suppressalis Walker and improve the prevention and control ability in rice, a Chilo suppressalis Walker control effect test was carried out on hybrid rice in 2022.The results showed that the twice application of 15 or 20 mL of 20% cyproflanilide suspension at 667 m² in the early stage of Chilo suppressalis Walker damage or the initial stage of wilting sheath in hybrid rice could have a control effect of 80.92% and 97.65% on the whole generation of Chilo suppressalis Walker, and its effective period could reach 20-30 days. However, its fast-acting effect on the larvae of Chilo suppressalis Walker was not strong. Therefore, in the control process of Chilo suppressalis Walker, the principle of “preventing as early and young as possible” should be followed, and long-term prevention and control should be carried out twice (interval 10 days) during the peak period of egg incubation.

Key words: cyproflanilide, Chilo suppressalis Walker, hybrid rice, pesticide experiment