OALib Journal期刊
ISSN: 2333-9721
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so2污染对农业害虫的间接影响
, PP. 158-162
Keywords: so2污染,农业害虫,平均相对生长速率(mrgr),繁殖力,内禀增长率(rm)
Abstract:
用开顶式熏气罩研究了so2污染对粘虫、黄地老虎、小菜蛾、桃蚜、萝卜蚜和豆蚜等农业害虫的影响。结果表明,适度so2污染显着地促进了这些昆虫的生长和/或繁殖,但高浓度so2污染对它们有明显的不良影响,这种作用是通过食料植物间接发生的。这些昆虫对适度so2污染的反应因种类而异:3种鳞翅目昆虫表现为幼虫的平均相对生长速率(mrgr)明显加快,成虫繁殖力变化不大;3种蚜虫主要表现为成蚜的繁殖力大幅度提高。若蚜(除豆蚜外)的mrgr也显着增加。对被处理食料植物营养成分的分析表明,so2污染诱导的蛋氨酸相对含量变化可能是它产生这些间接影响的重要原因。
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