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我县柳树经常遭到柳瘿蚊 Rhabdophaga sp.危害,幼虫在树的皮层和形成层吸取汁液,形成局部膨大——虫瘿,俗称“纺线筒”、“牛火腿”。柳树被害率可达25.6—43.5％。我们对此虫作了以下的观察。 形态特征 成虫 体长3.5毫米左右,紫红色至紫黑色。复眼黑色,触角灰黄色,链珠状,每节环生放射状细毛。翅膜质透明,汤匙形,翅缘、翅膀、翅脉上着生细毛,雌虫有明显的长产卵管。 卵长 0.4-0.8毫米,长椭圆形,桔黄色半透明。 幼虫 长1.9—3.0毫米,椭圆形,橘黄色,前胸腹面有一剑骨片。 蛹 长约2.6毫米,椭圆形,紫红色。
Willow trees in our county are often endangered by Rhabdophaga sp., And the larvae draw juice in the cortex and formation of the tree to form a local enlargement - insects, commonly known as “spinning tube”, “cattle ham.” Willow damage rate of 25.6-43.5%. We made the following observations about this worm. Morphological characteristics Adult body length 3.5 mm, purple to purple-black. Compound eyes black, horn gray, pearl-shaped, each ring radial hairy. Winged membranous transparent, spoon-shaped, winged edge, wings, veins on the hair fine, females have obvious long egg tube. Egg length 0.4-0.8 mm, long oval, orange translucent. Larvae 1.9-3.0 mm long, oval, orange, ventral ventral sword bone tablets. Pupa about 2.6 mm, oval, purple.