Population dynamics and associated factors of cereal aphids and armyworms under global change.
Population dynamics and associated factors of cereal aphids and armyworms under global change.
复制标题
全球变化下谷类蚜虫和粘虫的种群动态及相关因素
DOI：
10.1038/srep18801
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发表时间：
2015-12-22
影响因子：
4.6
通讯作者：
Zhao Z
中科院分区：
文献类型：
--
作者：
Wang L;Hui C;Sandhu HS;Li Z;Zhao Z
研究全球变化（主要包括气候和景观变化）对农业有害生物的影响对于发展可持续的有害生物管理至关重要。研究了1987 - 2010年河南省小麦食蚜和粘虫种群动态的相关因素。研究了气候（温度、降水和相对湿度）和农业特征（小麦比例、作物多样性、肥料投入和小麦单位面积产量）变化与谷物蚜虫和粘虫危害之间的关系。蚜害呈上升趋势，粘虫害无明显趋势，但有较强的年际波动。分析表明，与2月化肥投入量和平均气温关系最密切的因子为禾蚜种群动态，而与5月降水关系显著的因子为粘虫种群动态。通过比较这两种农业害虫的特征，我们确定了它们的相关因素之间差异的可能原因，这些因素与它们的觅食行为、寄主范围、迁徙能力和生活史的差异有关。这些结果可能有助于在全球变化下开发基于生态的谷物蚜虫和粘虫虫害管理。
Studying the impacts of global change, which comprises largely climate and landscape changes, on agricultural pests is crucial for developing sustainable pest management. This research is focused on understanding the factors associated with population dynamics of cereal aphids and armyworms feeding on wheat in Henan province in China from 1987 to 2010. Association between changes in climate (temperature, precipitation and relative humidity) and agricultural characteristics (wheat proportion, crop diversity, fertilizer input and wheat yield per unit area) and damage from cereal aphids and armyworms were examined. Cereal aphid damage has been rising, while armyworm damage had no obvious trends, but with strong year-to-year fluctuations. The analysis indicates that the factors most strongly associated with the population dynamics of cereal aphids are fertilizer input and mean temperature in February, while the population dynamics of armyworms is significantly related to precipitation in May. By comparing the characteristics of these two agricultural pests, we identify possible reasons for the disparity between their associated factors, which are related to the differences in their foraging behaviour, host range, migration capacity and life history. These results may contribute to developing ecologically based pest management for cereal aphids and armyworms under global change.