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Your Position :Home->Past Journals Catalog->2014年51 No.1

Impacts of mass-flowering plants on the abundance of natural enemies of arthropod pests in greenhouses in Northern China
Author of the article:FU Xue1, YE Le-Fu2** , HAN Xin-Hua1, SHAO Hong-Tao1, LV Jun1
Author's Workplace:(1. College of Agricultural Resource and Environment, HeiLongjiang University, Harbin 150086, China;2. College of Agriculture, Northeast Agricultural University, Harbin 150030, China
Key Words: glass greenhouse, cold area, mass-flower plant, predator, parasitoid, bio-diversity
Abstract:

       [Objectives]  To determine whether mass-flowering plants in greenhouses in cold regions provide nutrition for adult insects is an important issue related to the effective control of arthropod pests. [Methods]  The planting structure, species of flying adult insects captured on sticky card traps, influence of planting ratio (mass-flowering plants to other species) on pest abundance and parasitoid abundance were investigated in three independent, large, glass greenhouses in a suburb of Harbin city (Latitude 45°N) in 2010-2011. Predator abundance and the relationship between parasitoids and predators and between pest abundance and diversity were analyzed using linear regression models. [Results]  The results show that, at least inNorthern China, higher ratios of mass-flowering plants can increase the biodiversity of pests and suppress outbreaks of specific pest species in greenhouses. Monocultures of specific mass-flowering plants can, however, also lead to serious pest infestation, and fewer parasitoids and predators. Parasitoids and predators responded to environmental conditions in a similar way, except that predators, which are typically larger than parasitoids, were more sensitive to crop management, especially chemical spraying. [Conclusion]  This study provides primary information to inform the choice of plants for “bio-control engineering” of open fields. The methods used can also provide early warning of the invasion of exotic organisms and global change in arthropod biodiversity.

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