摘要
杧果切叶象(Deporaus marginatus Pascoe)专一为害杧果(Mangiferaindica L.)嫩叶。该虫在云南一年发生3～4代,世代重叠显著,生活史较为复杂。主要以幼虫和极少数成虫越冬。卵期2～3天;幼虫3龄,1～3龄历期分别是1～2、2～3和4～5天;蛹期10～14天;成虫期7～15天。成虫平均寿命114天。雌成虫将产有卵的嫩叶自叶片近基部处整齐咬断而使果树落叶,甚至秃枝。为害盛期5～10月。雨湿条件对该虫的发生程度和为害周期有重要影响。旱季翻耕园地、雨季拾毁切落叶以及药剂挑治可收到良好的防治效果。
The mango leaf-cutting weevil Deporaus marginatus Pascoe is a major pest to cause severe defoliation of mango Mangifera indica L..The life history showes 4 generations, and a small part 3 generations in Yunnan Province where the weevil appears in April and remains damaging up to November.This pest overwinters mainly as grubs in the soil with only a few adults on the host tree.Egg,larva,pupa and adult durations are 2～3,7 ～10,10～4 and 7～15 days respectively.Three larval instars have been observed. In this paper,the infesting behaviour of the pest insect is described in detail.The functions of several natural enemies are mentioned.The management measures are given including ploughing the orchard soil in the dry season,collecting and burning the fallen leaves on the ground every 3～5 days during the rainy months,and spraying insecticide occasionally according to the infectation level.
出处
《西南林学院学报》
1992年第1期84-87,共4页
Journal of Southwest Forestry College
关键词
芒果切叶象
生物学
芒果
防治
Deporaus marginatus Pascoe
Biology
Management
Mango
