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大代蛾发生规律与防治研究
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摘要:
大袋蛾是多种林木及茶、果的重要害虫。一年发生1代,以老熟幼虫越冬。常有不完全第2代发生。雌蛾平均每头产卵2623粒。由于雌蛾无翅,主要靠幼龄幼虫吐丝随风扬迁扩散,但在茶树等灌丛、矮树上飘迁有限,形成“为害中心”;在乔木上,则扬迁扩散迅速,易于大片发生。幼虫食叶量大,4、5龄幼虫暴食,8—9月间为害严重。幼虫较耐干旱,相对湿度40%时,孵化率仍达90%以上。食性杂,但不同树种间虫口差异明显。幼龄幼虫期受雨水冲刷和瓢虫等捕食,成长幼虫被寄蝇寄生、病害感染和鸟类啄食,综合构成大袋蛾的有力的自然控制因素。幼虫喜光,多聚于枝梢上部,利于果树修剪减少虫口。药剂防治宜于幼龄幼虫期进行,并适当重喷喷湿袋囊,敌百虫、敌敌畏、1605均有良好防治效果。
关键词:  大袋蛾,发生规律,防治
DOI:
基金项目:
DEVELOPMENT AND CONTROL OF THE BIGGER BAGWORM
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Abstract:
The bigger bagworm, Clania varigata Cram (Lepidoptera; Psychidae),is a pest seriously harmful to tea plant, certain fruits and many trees. Aseries of experiments were conducted to ascertain its life history, biologicalpeculiarity, development and relation to environment. The results reveal: Bigger bagworm multiplies once a year. The old larvae over winterwithin their' bags'. On average, a femal moth lays 2623 eggs. Femalemoths are wingless, and the bagworms spread mainly by young inster larval.The larvae are tolerant to drought, and in a low humidity (RH=40% ) itshatching Percentage is up to 90. Effective control measures include: a) biological control: There are many natural enemies durine larvalstage, such as parasitic flies, viruses and certain birds. They can power-fully suppress larval populations of this pests. We must protect and utilizethem to control bigger bagworm. b) chemical control: Some insecticides such as Dipterex, DDVP orParathion at can be applied against young larvae. c) tree pruning: The bagworm laryal are phototactic and prefer to livetogether on tree top. So frequent trimming of tea plants and fruit treesat proper time helps population decline.
Key words:  Bigger bagworm,Development,Control

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