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红蜘蛛是草莓主要害虫之一,要及时做好防治工作。红蜘蛛在棚室的枯枝、腐叶、土缝中或随种苗移栽进入棚室,当达到日平均气温10℃以上时成螨开始活动,日平均气温达到16℃时雌螨开始产卵。红蜘蛛刺吸叶片,田间呈现点片发生,再向周围植株扩散。在植株上先危害下部叶片,向植株上部叶片蔓延,在叶背拉丝结网躲藏。喜群集叶背主脉附近,吐丝结网于网下危害。可借风力及人员活动扩散传播。世代交替危害,防治不及时
Red spider is one of the main pests of strawberry, to make timely prevention and control work. Red spiders in the shed of dead branches, rot leaves, soil seams or seedlings transplanted into the greenhouse, when the average daily temperature reached above 10 ℃ into activity when the mites, the average daily temperature reached 16 ℃ female mites began to produce egg. Spider thorn sucking leaves, the field appeared spots occurred, and then spread to the surrounding plants. Harm the lower leaves on the plants first, spread to the upper leaves of the plants and pull the net in the leaves to hide. Hi cluster leaves the main vein near the back, spinning nets in the net harm. Can spread by wind and personnel activities. Alternate generations of harm, prevention and treatment is not timely