危害杧果叶片的瘿蚊新种──阳茎戟瘿蚊

A New Species of Gall Midge Damage Mango Leaf-Hastatomyia hastiphalla(Cecidomyiidae)

阳茎戟瘿蚊（Ｈａｓｔａｔｏｍｙｉａ ｈａｓｔｉｐｈａｌｌａ Ｙａｎｇ ｅｔ Ｌｕｏ）是国内外首次报道的芒果害虫，在广州每年发生７～８代，以蛹在土越冬。秋季气温２５～３０℃、相对湿度７０％～９０％，卵期２～３天，幼虫期４～６天，前蛹期４～１０天，蛹期６～１０天，成虫期１～１．５天。成虫在芒果嫩叶产卵，幼虫孵出后随即侵入叶肉并逐渐发育形成疱状突起的虫瘿，通常一叶多瘿。幼虫老熟后自行离瘿入土化蛹。

Among the pests mango,this mango gall midge (Hastatomyia hastiphlla Yang et Luo) is reported for first time in entomological literature. It occurred in the area of Guangzhou with 7-8 generations per year. It overwintered at pupa stage in soil. During autumn when the temperature reached 25 ~ 30℃with the relative humidity of 70% ~ 90%, the egg stage lasted 2~3days; larva stage, 4 ~6 days; prepupa stage, 4~ 10days; pupa stage, 6 ~10days, and the adult stage, 1 ~1. 5days. Eggs are laid on the young leaves of mango. After being hatched the larva penetrated into the leaf blade and developed a protuberance forming the gall. Usually many galls are formed in a single leaf. As the larva matured, it deserte the leaf, fall the soil and pupate in soil. The present paper describes the morphological characteristics of various stages of the gall midge, its growing habits, its life cycle, and the laws of its development.