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从1975年以来,我们采用棕片诱卵预测小地老虎Agrotis ypsilon(Rottemberg)发生期,发现棕片放在红花草(紫云英)田的诱卵量高,卵峰明显,放在其他作物田的着卵量低,甚至诱不到。为了明确小地老虎对红花草的产卵趋性,1980年在大田及养虫笼内用不同作物的榨出液处理棕片作对比试验,结果证明经红花草液处理的棕片诱卵效力最强。现将结果整理如下。 1.将约1×1.5尺棕片100片放在2—3亩长势较好的红花草田里,从蛾始盛至4月底诱集小地老虎产卵预测第一代发生期。经过1975年到1980年6年实际测报的结果指出,这种方法具有诱卵量多、峰期明显,而且不受油菜等蜜源作物的干扰。准确性比较高(表1)。
Since 1975, we predicted the occurrence of Agrotis ypsilon (Rottemberg) by brown oviposition and found that the brown ovule was found to have high levels of oophore and oviposit on the other plants The amount of eggs in the fields is low and can not even be induced. In order to clarify the small tiger on the flowering of red flowers of the tropism in 1980 in the field and cages in different cages with the extruded liquid treatment of brown tablets for comparison test results show that the safflower brown liquid treatment of oviposition effectiveness The strongest The results are now organized as follows. 1. Put about 1 × 1.5 feet brown tablets on 2-3 acres of better growing safflower grass fields, starting from the moths to the end of April to trap small tigers to lay eggs first generation prediction. After 6 years of actual measurement from 1975 to 1980, the results showed that this method has many eggs, peak period obvious, but also from the rape and other nectar crops interfere. The accuracy is high (Table 1).