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| 深圳郊区寄生小菜蛾的赤眼蜂种类及消长动态 | |
| 引用本文： | 何余容 庞雄飞. 深圳郊区寄生小菜蛾的赤眼蜂种类及消长动态[J]. 昆虫天敌, 2000, 22(1): 1-5 |
| 作者姓名： | 何余容 庞雄飞 |
| 作者单位： | 何余容（华南农业大学昆虫生态研究室,广州,510642）;庞雄飞（华南农业大学昆虫生态研究室,广州,510642） |
| 基金项目： | 广东省自然科学基金资助项目(980135);华南农业大学校长基金资助项目(4200-R98019) |
| 摘 要： | 在深圳郊区龙岗示范生态农场，寄生于小菜蛾的赤眼蜂为拟澳洲赤眼蜂Trichogramma confusum和赤眼蜂一新种Trichogramma sp.，其中拟澳洲赤眼蜂稍占优势。其寄生率受季节和化学农药的影响，全年中以秋季为最高，在收获期的菜芯地可高达30—35％；夏季降雨是寄生率低于5％的主要原因；在经常施用化学农药的菜地，寄生率始终维持在10％以下。小菜蛾卵不孵率随寄生率增加而升高，使小菜蛾卵总死亡率增加。 |
| 关 键 词： | 赤眼蜂 寄生率 小菜蛾 蜂种 消长动态 化学农药 收获期 总死亡率 升高 增加 |
| 文章编号： | 1001-6155(2000)01-0001-05 |
SPECIES AND PARASITISM OF TRICHOGRAMMA ON THE DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA IN SHENZHEN, CHINA |
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| HE Yurong PANG Xiongfei. SPECIES AND PARASITISM OF TRICHOGRAMMA ON THE DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA IN SHENZHEN, CHINA[J]. Natural Enemies of Insects, 2000, 22(1): 1-5 | |
| Authors: | HE Yurong PANG Xiongfei |
| Abstract: | Trichogramma confusum Viggiani and a new species, Trichogramma sp. (unpublished), were found attacking eggs of DBM in Shengzhen suburb. Between the two species the former was slightly predominant in the field. The parasitism of two species varied with season and usage of insecticides and reached 30-35% at the harvesting period of flowering cabbage in autumn, the highest around a year. The heavy rainfall was the main reason of less than 5% of parasitism in summer. In the field where insecticides were frequently used the parasitism was maintained below 10% around a year. The total mortality of DBM eggs was composed of parasitism and unhatching rate caused by feeding by female Trichogramma. |
| Keywords: | Plutella xylostella Trichogramma confusum Trichogramma sp. parasitism |
| 本文献已被 CNKI 维普 等数据库收录！ | |