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用田间试验数据做了6步相关回归分析。结果表明:跳(虫甲)类越冬成虫,主要为黄曲条跳岬(Phyllotreta vittata(Fabr.))和黄宽条跳(虫甲)(P.humilis Weise)的危害减慢奥罗油菜(Brassica napus L.)幼苗的指数生长,并且推迟其花期和其它生育期;秋季油菜籽产量与5叶期幼苗鲜重值呈密切正相关关系.r=0.8138～0.8290;5叶期幼苗鲜重值与截止6月2日的跳(虫甲)类越冬成虫对油菜苗数比值累积值呈密切负相关关系,r=-0.9120～0.9554;油菜籽损失率(Y)与跳(虫甲)类全体越冬成虫虫苗比累积值(X)呈密切正相关关系,R=0.9640,Y=1.8040+1.1796X+0.3381X~2;在当地农业和油菜害虫防治条件下,跳(虫甲)类越冬成虫的经济阈值为4.6头/m~2。
Six-step regression analysis was done with field data. The results showed that the prevalence of overwintering adults (Phyllotreta vittata (Fabr.)) And P.humilis Weise Brassica napus L. seedlings, and postponed their flowering and other growth stages. The yield of rapeseed in autumn was positively correlated with the fresh weight of seedlings at 5 leaf stage, r = 0.8138-0.890; There was a close negative correlation between the number of overwintering adults and the accumulative value of the number of Rapeseed (R) = 0.9120 ~ 0.9554 on June 2, while the percentage of rapeseed loss (Y) The overwintering adults showed a close positive correlation with accumulated value (X), R = 0.9640, Y = 1.8040 + 1.1796X + 0.3381X ~ 2. Under the conditions of local agriculture and canola pest control, overwintering adults The economic threshold is 4.6 head / m ~ 2.