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Effects of trunk injection with emamectin benzoate on arthropod diversity.

BACKGROUND
Pine wood nematode disease is a major plant quarantine object in the world. Trunk injection is an effective method for controlling pests that cause disease. To evaluate the ecological safety of trunk injection with emamectin benzoates in the forests of Pinus massoniana, the community diversity and community composition of soil arthropods and flying insects (Hymenoptera) were studied at different stages of trunk injections.


RESULTS
The dominant taxonomic groups of soil arthropods were Collembola (30.80%), Insecta (26.42%), and Arachnida (23.84%). The taxonomic groups of flying insects (Hymenoptera) were Ichneumonidae (48.94%), Formicidae (14.10%), and Braconidae (8.44%). Trunk injection with emamectin benzoate has no significant effect on the diversity indices of total soil arthropods and flying insects (Hymenoptera). However, it has a significant effect on the diversity indices of detritivores for soil arthropods. It changed the community composition of soil arthropods but did not impact the community composition of flying insects (Hymenoptera). Redundancy analysis (RDA) between arthropod community structure and environmental variables shows total potassium, residual of green leaf, and residual of litter leaf have a significant impact on the community structure of soil arthropods, and total phosphorus, total nitrogen, water content, organic matter, and total potassium have a significant impact on the community structure of flying insects (Hymenoptera).


CONCLUSION
Trunk injection with emamectin benzoate is safe for the ecological environment. The study can provide a reference for the prevention and control of pine wood nematode disease, which is of great significance to forest management and pest control in the world. This article is protected by copyright. All rights reserved.