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危害木槿、扶桑、石榴、菊花等多种花卉的棉蚜,有着趋黄的习性,因此,可以利用黄色板诱蚜,进行物理防治。方法是:在木板上涂上黄油漆,油漆干后将板固定于一个不矮于花的较明显处,再涂上机油即可使用。黄油漆也可用黄广告色代替,不过需罩上塑料薄膜,薄膜外再涂上机油。挂板后,要经常检查板上是否有机油,特别是雨后更要留心。如无机油,及时补上。
Hibiscus, hibiscus, hibiscus, pomegranate, chrysanthemum and other flowers of cotton aphid, with yellow habit, therefore, you can use the yellow plate to induce aphids, physical control. The method is: Apply yellow paint on the board, dry the board after the paint is fixed to a less obvious than the flowers, and then coated with oil can be used. Yellow paint can also be used instead of yellow advertising colors, but to be covered with plastic film, film and then coated with oil. After hanging plate, always check if there is oil on the plate, especially after rain. If no oil, make up in time.