蚜虫对颜色有一定的趋性。1979—1981年春夏,在小面积的不同作物的田块里,利用不同染色的纸牌进行试诱。在试诱取得初步成功的基础上,1981—1982年春夏,又先后利用十三种不同染色纸牌插在184亩连片油菜田里(其中甘兰型82.5亩、芥菜型87.5亩、白菜型14亩)进行较大面积的诱捕试验,效果显著,蚜虫密度低。 Aphids have some tendency to color. In the spring and summer of 1979-1981, pilings were made using different colored cards in small plots of different crops. Based on the initial success of the experiment, 1981-1982 spring and summer, it was successively inserted in 184 acres of contiguous canola field with 13 different kinds of colored paper (including 87.5 mu of Brassica campestris, 87.5 mu of Brassica campestris, 14 acres) for larger area trapping test, the effect is significant, low aphid density.