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Journal of Agriculture ›› 2022, Vol. 12 ›› Issue (3): 23-29.doi: 10.11923/j.issn.2095-4050.cjas20200100011

Special Issue: 生物技术 园艺

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Investigation on Peach Aphids and Study on Insecticides’ Control Efficacy and Safety for Natural Enemies

GONG Qingtao1(), LI Guixiang1, LI Suhong1,2, WU Haibin1, JIANG Lili1, SUN Ruihong1, ZHANG Anning1()   

  1. 1Shandong Institute of Pomology, Tai'an 271000, Shandong, China
    2College of Horticulture Science and Engineering, Shandong Agricultural University/State Key Laboratory of Crop Biology, Tai'an 271000, Shandong, China
  • Received:2020-01-17 Revised:2020-03-22 Online:2022-03-20 Published:2022-03-22
  • Contact: ZHANG Anning E-mail:gongzheng.1984@163.com;gongqingtao@shandong.cn

Abstract:

To clarify the damage characteristics of aphids in peach trees, the species, quantity and damage were investigated. The spraying method was used to compare the control efficacy of 4 insecticides on Myzus persicae Sulzer. The quantities and species of natural enemies, the dominance degree, the state of main natural enemies after 21 days of spraying insecticides, the effect of insecticide concentrations on natural enemies were compared. The results showed that: (1) in terms of species, nectarine and wild peach were mainly damaged by M. persicae, and the flowering peach was mainly damaged by Hyalopterus amygdali Blanchard; quantitatively speaking, M. persicae in nectarine accounted for 95.4%, which was significantly higher than the number of H. amygdali, and there was no damage by Tuberocephalus momonis Matsumura; for wild peach, the quantities of M. persicae and H. amygdali were similar, which were significantly higher than that of T. momonis; flowering peach was mainly damaged by H. amygdali, and there were significant differences in the number of aphid species; M. persicae and H. amygdali had the mixed occurrence on individual leaf; (2) spirotetramat and sulfoxaflor were recommended at 44.8 mg/L and 33.3 mg/L for spraying treatment, and their 21 days’ control efficacy was 99.9% and 82.1%, respectively; veratridine was recommended at 10 mg/L, its 14 days’control efficacy was 38.5%; Metarhizium anisopliae CQMa421 was not recommended for M. persicae control; (3) the investigation revealed that there were 7 species of natural enemies of M. persicae, and Harmonia axyridis Pallas was the dominant species, accounting for 91.0%; Propylaea japonica Thunberg was the abundant species, accounting for 7.7%, and the rest were the occasional species; the stage development of the 2 species of ladybugs was basically the same, and the larvae and eggs were dominant in this stage. The study showed that all insecticides and treatments were safe for predatory natural enemies.

Key words: aphid, preference, peach, control efficacy, safety

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