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在田间采用人工剪叶方法,测定杂交晚稻汕优10号组合不同生育期对稻纵卷叶螟不同受害水平的补偿反应。结果表明:移栽后0-55天的稻株叶片受害时间的临界补偿方程为DF_(tco)(d)=45.119+(241.809+0.534DF~2)~(1/2)叶片受害时间的临界耐害方程为:DF_tto(d)=45.119±(105.737+0.534DF~2+5.34DF)~(1/2);叶片受害程度的临界补偿方程为:Df_co(%)=(3358.75-168.95DF_t+1.872DF_t~2)~(1/2);叶片受害程度的临界耐害方程为DF_to(%)=-5±(3632.3-168.95DF_t+1.872DF_t~2)~(1/2)。式中DF为模拟受害程度(%),DF_t,为受害时期(移栽后天数)。看出,汕优10号的临界补偿反应的时间为移栽后0-29.5天(播种后41-70.5天),受害程度为0%-58.0%。临界耐害反应的时间为20.6-34.8天(播种后61.6-75.8天),受害程度为0%-26%。
Artificial leaf-cutting method was used in the field to determine the compensatory response to different damage levels of the rice leaf roller at different growth stages of hybrid rice Shanyou-10. The results showed that the critical compensation equation for the damage time of rice leaves 0-55 days after transplanting was critical for the damage time of DF_ (tco) (d) = 45.119 + (241.809 + 0.534DF ~ 2) ~ (1/2) The tolerance equation of leaf damage degree is: DF_tto (d) = 45.119 ± (105.737 + 0.534DF ~ 2 + 5.34DF) ~ (1/2); The critical compensation equation of leaf damage is as follows: Dfco = 3358.75-168.95DF_t + 1.872DF_t ~ 2) ~ (1/2). The critical damage resistance equation of leaf damage is DF_to (%) = -5 ± (3632.3-168.95DF_t + 1.872DF_t ~ 2) ~ (1/2). Where DF is to simulate the degree of victimization (%), DF_t, is the victimization period (days after transplanting). It can be seen that the critical compensation response time of Shanyou 10 is 0-29.5 days after transplanting (41-70.5 days after sowing), and the damage degree is 0% -58.0%. Critical resistance reaction time was 20.6-34.8 days (61.6-75.8 days after sowing), the extent of damage was 0% -26%.