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1 白粉虱 1 1 为害症状:成虫或若虫集于叶背,刺吸汁液,使叶片生长受阻变黄,影响植物正常生长发育。由于其能分泌大量蜜露,堆于叶面及果实上,造成煤污,严重影响叶片的光合作用和呼吸作用。 1.2 防治方法 1.2.1 农业防治:把好育苗关,培育无虫苗:定植前温室熏蒸;尽量避免黄瓜和番茄混栽,以免加重危害。 1.2.2 物理防治: 驱蚜避蚜法:利用银灰色膜避蚜,效果显著,每667m~2用银灰色膜5kg,可和地膜一样覆盖,也可将银灰色膜剪成10～15cm宽的膜条,每667m~2用量1.5kg,拉成网眼状,也可收到较好效果。 诱蚜法:利用蚜虫的趋黄特性,在温室内设1m~2×0.1m~2的橙黄色板,在板上涂上10号机油,每667m~2大棚设32～34块,诱杀成虫效果显著,每隔7～10天重
1 whitefly 1 1 harmful symptoms: adult or nymph set in the leaf back, sucking juice, the growth of the leaves blocked yellow, affecting the normal growth and development of plants. Because of its ability to secrete large amounts of honey dew, piled on the foliage and fruits, resulting in coal pollution, seriously affecting leaf photosynthesis and respiration. 1.2 Prevention and treatment methods 1.2.1 Agricultural Prevention and Control: Put good seedling clearance, nurture insects Miao: greenhouse fumigation before planting; try to avoid mixing cucumbers and tomatoes, so as not to aggravate the harm. 1.2.2 physical control: drive aphids avoid aphid law: the use of silver gray film to avoid aphids, the effect is remarkable, every 667m ~ 2 with silver gray film 5kg, and film can be the same coverage, but also the silver gray film cut 10 ~ 15cm wide Of the film, every 667m ~ 2 dosage 1.5kg, pulled into a mesh-like, but also receive better results. Lure aphid law: the use of aphids yellowing characteristics, in the greenhouse with 1m ~ 2 × 0.1m ~ 2 orange yellow plate, coated with oil on the plate 10, each set of 32 ~ 34 greenhouse 66 ~ 2, trapping adults The effect is significant, every 7 to 10 days heavy