| 摘要: |
| 【目的】明确梨瘿蚊(Contarinia pyrivoraRiley)的危害特点及药剂防治效果，为其综合防治提供依据。【方法】在陕西杨凌选择3个代表性果园，将田间调查和药效试验相结合，研究梨瘿蚊危害程度与梨园管理水平和梨树品种的关系，以及5种杀虫剂的防治效果。【结果】梨园管理水平高，梨树受害程度轻；管理水平低，则梨树受害程度重。在调查的4个梨树品种中，“明月沙梨”受害最重，其次是“幸水沙梨”，“雪花梨”受害明显较轻，“康德梨”则未发现受害；田间药剂试验结果表明，40%毒死蜱EC、20%三唑磷EC、10%吡虫啉WP和0.2%阿维菌素EC树上喷雾对梨瘿蚊幼虫均有较好的防治效果，药后第1天的防效分别为93.32%，95.61%，97.17%和95.39%，但随着施药时间的延长，防效略有下降。【结论】梨瘿蚊危害程度与梨园管理水平和梨树品种具有密切关系，药剂防治可以取得良好的效果。 |
| 关键词: 梨瘿蚊 危害 药效试验 防治技术 梨树 |
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| 基金项目:农业部公益性行业科研专项（200803006） |
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| Studies on damage characteristics and insecticide control technique of Contarinia pyrivora Riley |
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| Abstract: |
| 【Objective】The study was done to make sure damage characteristics of Contarinia pyrivora and its insecticidal control efficiency,which can give a solid basis for integrated management of this pest.【Method】The relationships between damage degree and the level of orchard management and the pear varieties were investigated and the control efficiency of five insecticides was studied through the field efficacy trials in three representative pear orchards of Yangling area,Shaanxi Province.【Result】C.pyrivora caused less damage to the pear in the high level of orchard management and more damage to the pear in the low level of orchard management.In four pear varieties,C.pyrivora caused the most damage to “Moonlight” sand pear,more damage to “Xingshui” sand pear,less damage to “Snowflake” pear and no damage to “Kant” pear.The field efficacy trials showed that 40% Chlorpyrifos EC,20% Triazophos EC,10% Imidacloprid WP and 0.2% Abamectins EC had good efficiency in controlling the larvae of C.pyrivora by spraying.On the first day after spraying,the controlling efficiency was 93.32%,95.61%,97.17%,95.39% respectively.As time went on,the controlling efficiency decreased slightly.【Conclusion】The degree of damage caused by Contarinia pyrivora was closely related to the level of orchard management and the pear varieties.The insecticide control had a good efficiency in controlling this pest. |
| Key words: Contarinia pyrivora damage field efficacy trial control technique pear |
