Insects (2021) 12 (9 - 791)

Qingcai Lin, Hao Chen, Xiaoyan Dai, Shuyan Yin, Chenghao Shi, Zhenjuan Yin, Jinping Zhang, Feng Zhang, Li Zheng and Yifan Zhai (2021)
Myzus persicae management through combined use of beneficial insects and thiacloprid in pepper seedlings
Insects 12 (9 - 791)
Abstract: Excessive insecticide application has posed a threat to pollinators and has also increased insecticide resistance of Myzus persicae Sulzer. Therefore, it is urgent to develop an economical and effective strategy, especially for greenhouse vegetables. Firstly, we selected a neonicotinoid insecticide that is specifically fatal to M. persicae but relatively safe to predators and bumblebees by laboratory toxicity tests and risk assessments. Then, we tested the effectiveness of the neonicotinoid insecticide under different temperature conditions. According to the LC₅₀ values and the hazard quotients, thiacloprid met the requirements. Greenhouse trails indicated that thiacloprid was quite efficient, while control dropped to 80% without the application of thiacloprid. As for biological control, Harmonia axyridis effectively controlled 90% of aphids with thiacloprid or not. However, Aphidoletes aphidimyza performed better above 20 °C. Our results indicated that it is cost-effective to control M. persicae with A. aphidimyza in suitable temperature conditions and H. axyridis was more effective at low temperatures. Practically, thiacloprid could be used either as an emergency option to control aphids' abundance alone or in combination with natural enemies.
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Database assignments for author(s): Feng Zhang

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
control - general
Research topic(s) for beneficials or antagonists:
application technology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Myzus persicae	Green pepper/chilli (Capsicum)	China (NE)
Harmonia axyridis (predator)	Myzus persicae	Green pepper/chilli (Capsicum)	China (NE)
Aphidoletes aphidimyza (predator)	Myzus persicae	Green pepper/chilli (Capsicum)	China (NE)