论文部分内容阅读
全球正经历以变暖为主要特征的气候变化,由此带来的干旱将对农业生态系统造成重要影响。本文综述了干旱胁迫下寄主植物对植食性昆虫及其天敌影响的国内外最新研究进展。在干旱胁迫下,寄主植物物理性状、营养状况和次生代谢物质等均发生变化,这些变化导致植食性昆虫的生存环境和营养物质的获取等方面发生改变,从而影响了害虫生长发育和种群动态。干旱胁迫还导致寄主物候变化与昆虫发生不同步,使害虫缺乏食物。另外干旱也会引起植食性害虫天敌的种群发生变化,从而对植食性昆虫种群数量产生间接的影响。
The world is experiencing climate change characterized by warming. The resulting drought will have a major impact on agro-ecosystems. This review summarizes recent research progress at home and abroad on the effects of host plants on herbivorous insects and their natural enemies under drought stress. Under drought stress, the physical characters, nutritional status and secondary metabolites of host plants all changed. These changes led to the change of living environment and nutrient availability of herbivorous insects, which affected the growth and development of pests and the population dynamics . Drought stress also causes the host phenology to change out of step with insects, making the pests lack food. In addition, droughts also cause changes in the populations of natural enemies of phytoplactive pests, which in turn have an indirect effect on the population of herbivorous insects.