试验早已证明,蚜虫超飞时是向着天空的短波光飞翔的;但在降落时,却受植物表面所反射的黄色等长波光吸引。黄板诱蚜,就是利用有翅蚜降落时对黄色趋性的原理,来防治蚜虫的。实践证明,大面积开展黄板诱蚜,是消灭蚜虫的有效办法之一。 1975年4月,我们在利用黄板测报棉蚜由越冬寄主迁向棉苗时,看到黄颜色对有翅蚜的诱集力很强。在第一次迁飞高峰期4月26—30日,五天中,一块黄板两面共诱获有翅蚜202头。因此,5月中旬刈麦后,在孔东公社六大队1,037亩棉地上普遍开展黄板诱蚜。仅在棉蚜第二次迁飞高峰期5月23—29日七天中,每块黄板共诱获有翅蚜337头。在6月份,棉田中棉蚜 Experiments have long proved that aphids fly toward the shortwave of the sky when flying superfly, but they are attracted by the yellow, long-wave light reflected by the plant surface when they land. Yellow board lure aphids, is the use of winged aphids landing on the principle of yellow trophism, to control aphids. Practice has proved that a large area to carry a yellow lure aphid is one of the effective ways to eliminate aphids. In April 1975, when we used the yellow board to report that the cotton aphid migrated from the overwintering host to the cotton seedlings, we found that the yellow color is very attractive to the winged aphids. On the first peak of the relocation April 26-30, five days, 202 pieces of winged aphids were seized on both sides of a piece of yellow board. Therefore, after sowing in mid-May, yellow-lipped yellow aphids were commonly found on 1,037 mu of paddy in the Sixth Brigade of Kongdong Commune. A total of 337 finned winged aphids were harvested on each of the yellow plates only during the second day of May 23-29 during the second peak of cotton aphid migration. Cotton aphid in June