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十一、山楂叶螨山楂叶螨又名山楂红蜘蛛、樱桃红蜘蛛,主要为害苹果,梨、桃、李、杏、山楂和樱桃等果树。雌成螨体椭圆形。体长0.5—0.6毫米,体背前方隆起。冬型成螨体色鲜红色,夏型为暗红色。体背有24根细长的刚毛。分为6排。足淡黄色。雄成螨较雌成螨体小,体躯由第三对足向后方逐渐变细,末端尖。初蜕皮的雄螨体色为黄绿色,后变桔黄色,体背两侧有黑绿色斑块。初孵的幼螨体呈圆形,黄白色,取食后变为椭圆形,浅绿色,足3对。若螨体色淡翠绿色或浅橙色,足4对。前期若螨体背始见刚毛,体背两侧已显露黑绿色的色素斑块,后期若螨体形已似成螨。
Eleven, hawthorn leaf mite Hawthorn spider mite, also known as red spider hawthorn, cherry spider mite, the main damage to apple, pear, peach, plum, apricot, hawthorn and cherry and other fruit trees. Female adult mite body oval. Body length 0.5-0.6 mm, body back uplift. Winter type mite body color bright red, summer type dark red. Body back with 24 slender bristles. Divided into 6 rows. Pale yellow. Male adult mites than female adult mites body, body from the third pair of feet tapering to the rear, the tip of the tip. Moult mite body color is yellow-green, then change to orange, black and green plaque on both sides of the body back. The newly hatched larvae were round, yellow-white, turned oval after feeding, light green, three pairs of feet. If mite body color light green or light orange, enough 4 pairs. If the early mite body see the bristles, dorsal both sides of the body has been revealed dark green pigment plaque, late mite body shape has become a mite.