Synergistic interactions between entomopathogenic nematodes and thiamethoxam to manage mature larvae of Carposina sasakii (Lepidoptera: Carposinidae)

文献类型： 外文期刊

第一作者： Wu, Haibin

作者： Wu, Haibin;Zhang, Ganyu;Zhu, Yi;Zhang, Yong;Jiang, Lili;Qiao, Kang;Liu, Tingting;Wang, Mian

作者机构：

关键词： Entomopathogenic nematodes; Thiamethoxam; Synergistic effect; Carposina sasakii

期刊名称：CROP PROTECTION （ 影响因子：2.5； 五年影响因子：3.0 ）

ISSN： 0261-2194

年卷期： 2025 年 197 卷

页码：

收录情况： SCI

摘要： The peach fruit moth, Carposina sasakii, is a constant threat to pome and stone fruits. In this study, seven entomopathogenic nematode species (EPNs), including Heterorhabditis bacteriophora H06 (H06), Steinernema carpocapsae All (All), Steinernema feltiae JY-90 (JY-90), S. carpocapsae NC116 (NC116), Steinernema longicaudum X-7 (X-7), S. feltiae SF-SN (Sf) and Heterorhabditis indica LN2 (LN2) were tested for biotoxicity against C. sasakii mature larvae. Then the effects of temperature and soil moisture on the mortality of C. sasakii mature larvae caused by the three most efficient EPNs combined with thiamethoxam were further evaluated. Moreover, H06, the most effective species, was employed to determine the synergistic effects with thiamethoxam to control C. sasakii under laboratory and field conditions. Results showed that H06, LN2 and X-7 caused high mortality of C. sasakii mature larvae, and an additive effect was found between the three EPNs at 2.0 billion infective juveniles (IJs)/ha and thiamethoxam at 1.5 kg/ha under laboratory conditions. In combination with thiamethoxam, H06 caused higher mortality than X-7 and LN2 at 20 degrees C and substrate moisture of 10-18 %. Synergism was observed between H06 at 1.0 and 1.5 billion IJs/ha and thiamethoxam at 0.5 and 0.75 kg/ha. In the field trials, H06 at 1.0 billion IJs/ha + thiamethoxam at 0.5 kg/ha applied twice had greater control effects than that of a single treatment with H06 at 3.0 billion IJs/ha + thiamethoxam at 1.5 kg/ha. Compared to traditional chlorantraniliprole treatment, H06 + thiamethoxam displayed the greatest control effect, which reached a minimum control efficacy of 93.08 % for up to three months. Taken together, this new type technology transformed traditional chemical control using conventional spray method against adults, eggs and newly hatched larvae into the synergistic combination of a biological agent and a chemical agent against C. sasakii mature larvae under the soil. The results suggested that the technique to control C. sasakii mature larvae in soil was a promising method to be incorporated in the integrated management programs in fruit production.

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