| 影响小枕异绒螨发生量和对棉蚜控制作用因素的研究 |
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| 引用本文： | 徐维骝,陈佩龙,王昆,王心亚.影响小枕异绒螨发生量和对棉蚜控制作用因素的研究[J].中国生物防治,1993(4). |
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| 作者姓名： | 徐维骝 陈佩龙 王昆 王心亚 |
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| 作者单位： | 江苏省射阳县环境保护局 224300
(徐维骝)，江苏省射阳县棉花原种场 224300
(陈佩龙)，江苏省射阳县农科所 224300
(王昆)，江苏省射阳县农干校 224300(王心亚) |
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| 摘 要： | 在江苏射阳7块棉田观察调查的结果表明,小枕异绒螨的幼螨是棉蚜的重要天敌。幼螨发生量随田块和调查时期而不同,一般5月中下旬为发生高峰。5、6月间4次调查,平均每100头蚜虫有幼螨8.8头,最多61.6头,棉蚜平均被寄生率为6.5％,最高34.8％。影响幼螨发生量和棉蚜被寄生率的主要因素有:(1)旱改后连续旱作的年份,(2)茬口,(3)棉田用药治虫。旱作年份长、纯作棉和棉田用药少均对幼螨发生有利,棉蚜的被寄生率也较高。
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| 关 键 词： | 小枕异绒螨 棉蚜 发生量 寄生率 |
FACTORS AFFECTING THE POPULATION OF ALLOTHROMBIUM PUIVINUM[ACARIFORMES: TROMBIDIDAE] AND ITS CONTROL EFFECTAGAINST COTTON APHID, APHIS GOSSYPII |
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| XU Wei-liu CHEN Pei-long.FACTORS AFFECTING THE POPULATION OF ALLOTHROMBIUM PUIVINUM[ACARIFORMES: TROMBIDIDAE] AND ITS CONTROL EFFECTAGAINST COTTON APHID, APHIS GOSSYPII[J].Chinese Journal of Biological Control,1993(4). |
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| Authors: | XU Wei-liu CHEN Pei-long |
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| Abstract: | Result of the field sampling and observations conducted in 7 cotton field plots of Sheyang County, Jiangsu Province indicated that larvae of the mite Allothrombium puivinum Ewing is an important parasite of the cotton aphid. The population of the mite varied in different seasons and plots. Population peak of the mite was observed during mid to late May. The average number of the mite per 100 aphids in 4 samples during May-June ranged from 8.8 to 61.6, with the average parasitization of the aphid being 6.5% (max. 34.8%). Factors in the field affecting population numbers of the parasitic mite and its control effect to the cotton aphids included duration of the field planted with dry-land crop, type of crops in rotation and use of chemical pesticides in the fields. Long period of dry-land cropping, monocropping of cotton and reduced usage of pesticides were found to favor the parasitic mite. |
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| Keywords: | Allothrombium puivinum Aphis gossypii parasitic mite |
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