| 核桃根象生物学特性及防治试验 |
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| 引用本文： | 肖银波,周建华,肖育贵,赵蓉.核桃根象生物学特性及防治试验[J].四川林业科技,2004,25(4):37-40. |
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| 作者姓名： | 肖银波 周建华 肖育贵 赵蓉 |
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| 作者单位： | 四川省林业科学研究院,四川,成都,610066 |
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| 摘 要： | 核桃根象(Dyscerus juglaus)是四川省青川、平武等地危害核桃最为严重的害虫之一。该虫2a一代，跨3个年度，以幼虫蛀食核桃根颈部皮层致使大树衰弱乃至枯死。越冬成虫3月中旬开始活动，6月开始产卵，至到9月。卵期10d左右。幼虫孵化蛀食核桃韧皮部危害，至当年11月，以幼虫形态越冬。翌年3月开始活动，4月化蛹，蛹期20d～30d。成虫羽化后，当年可交配产部分卵，并以成虫在根颈部越冬。防治试验表明，以氧化乐果注射入树皮受害上方防治效果较好。
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| 关 键 词： | 核桃根象 生物学 防治 |
| 文章编号： | 1003-5508(2004)04-0037-03 |
| 修稿时间： | 2004年8月21日 |
Biological Characteristics of Dyscerus juglaus and its control tests |
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| XIAO Yin-bo ZHOU Jian-hua XIAO Yu-gui,ZHAO Rong.Biological Characteristics of Dyscerus juglaus and its control tests[J].Journal of Sichuan Forestry Science and Technology,2004,25(4):37-40. |
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| Authors: | XIAO Yin-bo ZHOU Jian-hua XIAO Yu-gui ZHAO Rong |
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| Abstract: | Dyscerus juglaus is one of the worst pests which is severely harmful to walnut in Qingchuan and Pingwu counties of Sichuan Province. One generation of Dyscerus juglaus occurs per two years and will be found in three years. Larvae of Dyscerus juglaus chiefly feed on root crown cortices of walnut trees,thus causing the trees to weaken or die.The adults that have overwintered come to their new biological behavior phase in the middle of March,then mate,and lay eggs from June to September. As the adults die constantly,Dyscerus juglaus larvae hatch and eat into the bast of walnut trees until November,and come through the winter.They begin to eat in next March. Pupae can be found in April,and the period of pupae will last about 20 to 30 days. After eclosion, the adults begin to eat, mate and lay eggs. The adults like to come together to winter at the legs of walnut trees. By droping omethoate into the bast of walnut trees upon the distribution of larvae,Dyscerus juglaus can be relatively well controlled. |
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| Keywords: | Dyscerus juglaus Biological Characteristics Control |
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