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水稻分蘖期、孕穗期分别按三化螟卵量60—600块/亩接入试验小区。分蘖期接种的水稻枯心率达1.125—9.607%,但分蘖数除600块/亩的较对照区少以外,其余均较对照高。孕穗期接种的白穗率达1.692—18.395%,但被害株的分蘖健穗的千粒重都较对照区高。实测两期接种的水稻每亩产量,表明60块卵/亩处理分别比对照增加0.53%和1.2%,说明水稻对三化螟危害后有一定的补偿作用。据此,本文还计算出不同时期防治三化螟的指标分别为114—134块卵/亩、90—105块卵/亩。
The tillering stage and booting stage of rice were access to the experimental plot according to the amount of eggs of 60 g / The tillering inoculated rice withered heart rate of 1.125-9.607%, but the number of tillers except 600 / mu less than the control area, the rest were higher than the control. Booting at the booting stage white spike rate of 1.692-18.395%, but the injured strain tillering spike 1000 grain weight are higher than the control area. The measured rice yield per mu of two inoculation showed that 60 eggs / acre treatment increased 0.53% and 1.2% respectively compared with the control, indicating that rice could compensate for the damage of the rice stem borer, Chilo suppressalis. Accordingly, this article also calculated the indicators of the prevention and control of Borer at different times were 114-134 eggs / mu, 90-105 eggs / mu.