23 10 月

Comparison of fumigation efficacy of methyl bromide alone and phosphine applied either alone or simultaneously or sequentially against Bactrocera correcta in Selenicereus undatus (red pitaya) fruit

2024 年 10 月 23 日
採後處理, 期刊論文
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作者： Shan, Changyao ; Li, Baishu ; Li, Li ; Du, Xin ; Ren, Yonglin ; McKirdy, Simon J. ; Liu, Tao
刊名： Pest management science
期刊所屬國別：
出版年： 202312
關鍵字： Bromomethane ; Fruit ; Fumigation ; Larvae ; Phosphine
摘要： "BACKGROUND Bactrocera correcta (Bezzi) is a significant pest of the red pitaya fruit (Selenicereus undatus). This study investigated the insecticidal effects of methyl bromide (MB) alone, phosphine (PH3) alone, both applied simultaneously (PH3 + MB), and PH3 application followed sequentially by MB (PH3 → MB) against B. correcta in red pitaya fruits. RESULTS The 3rd instar larvae of B. correcta were the most tolerant to MB alone and the combined treatments, whereas eggs were the most susceptible stage. Both the PH3 + MB and PH3 → MB treatments resulted in higher mortality at all stages than MB alone, demonstrating a synergistic effect between MB and PH3. The toxicity of the combined treatments increased with increasing PH3 concentrations, with the optimal concentration recorded being 1.42 to 2.84 g m−3. Further probit analysis revealed that compared to the MB treatment alone, the median lethal dose values of MB in PH3 + MB and PH3 → MB treatment, were reduced to 63.73% and 66.82%, respectively. Fruit quality was not adversely affected by either of the combined treatments. CONCLUSION This work provides robust evidence that combining MB and PH3 to control B. correcta is highly effective, especially the PH3 → MB treatment. This combination decreased the amount of MB required for effective control at all life stages, while protecting fruit quality against MB phytotoxicity to a greater extent than conventional MB fumigation alone. © 2023 Society of Chemical Industry. We found that combined fumigation against Bactrocera correcta (Bezzi) (Diptera: Tephritidae) in red pitaya fruit, in particular sequential fumigation, can contribute to postharvest pest control in a very practical way and assist in meeting high value‐added fruit market demand."
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