美国农业部科学家,发明一种简便实用的粉虱捕捉器,即用一块沾上粘液的黄板,捕捉温室粉虱,效果十分明显。科研人员最初在温室番茄植株上,缚上40厘米左右长的白纸条,在温室中人工养殖大量粉虱,粉虱一般均滞留在植株上,用手摇动植株,粉虱即飞动,在株冠上方飞旋数秒钟,然后又重行滞留在植株上。接着将白纸片取走,换上黄纸板,再摇动植株,结果发现约70%的粉虱停留的黄纸板上,根据这一现象,科研人员进行一系列试验。在一次试验中,在粉虱危害严重的番茄温室中,置放涂 US Department of Agriculture scientists invented a simple and practical whitefly catcher, that is, with a sticky yellow board, capture greenhouse whitefly, the effect is very obvious. Researchers initially in tomato plants in the greenhouse, tied to about 40 cm long white strips, in the greenhouse artificial breeding of a large number of whiteflies, whiteflies are generally retained in the plant, hand shaking plants, whiteflies that fly, in the Corona crown above the spin for a few seconds, and then re-stranded in the plant. The white paper was then removed, replaced with yellow cardboard, and then shaken plants. About 70% of the whitefly stayed on the yellow cardboard. According to this phenomenon, researchers conducted a series of tests. In one experiment, the whitefly in the greenhouse of tomatoes in serious harm, set the Tu