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<p><i>Botrytis cinerea</i> is a&#xa0;fungal pathogen that causes significant damage to table and wine grapes. Various chemicals are intensively sprayed to protect grapes from this fungal pathogen; however, this practice can significantly increase production costs and lead to residue risks during the production season. This study investigated the effectiveness and minimum effective application doses of commercial plant protection products containing different active ingredients in various formulations used to combat <i>B.&#xa0;cinerea</i>. The effectiveness of three licensed plant protection products (fenhexamid, cyprodinil, and pyrimethanil) against a&#xa0;<i>B.&#xa0;cinerea</i> isolate was compared comparing these products, sold in various package sizes and at different prices, in controlling <i>B.&#xa0;cinerea</i> was investigated, assessing whether there was any difference between them. The study was conducted by incubating <i>B.&#xa0;cinerea</i> isolates in Petri dishes of 9‑cm diameter containing potato dextrose agar. The diameter of the fungal colony was measured after 3‑,&#xa0;5-, and 7‑day incubation periods. The results showed that the three active ingredients were effective at the recommended dose of 1000 ppm and at doses as low as 80 ppm. However, significant decreases in their effectiveness were detected at much lower doses of 40&#xa0;and 20 ppm. The active ingredient pyrimethanil was the standout fungicide in terms of efficacy rates, package size, price stability, and time between the last application and harvest. The results of this study can help reduce production costs and residue risk.</p>

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Comparison of the in Vitro Effectiveness of Some Fungicides Against Botrytis cinerea in Grapes

  • 期刊论文

  • 发表日期：

    2025年11月12日

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  • Mohamed Osman Mohamed,
  • Himmet Tezcan,
  • Arif Atak

摘要

Botrytis cinerea is a fungal pathogen that causes significant damage to table and wine grapes. Various chemicals are intensively sprayed to protect grapes from this fungal pathogen; however, this practice can significantly increase production costs and lead to residue risks during the production season. This study investigated the effectiveness and minimum effective application doses of commercial plant protection products containing different active ingredients in various formulations used to combat B. cinerea. The effectiveness of three licensed plant protection products (fenhexamid, cyprodinil, and pyrimethanil) against a B. cinerea isolate was compared comparing these products, sold in various package sizes and at different prices, in controlling B. cinerea was investigated, assessing whether there was any difference between them. The study was conducted by incubating B. cinerea isolates in Petri dishes of 9‑cm diameter containing potato dextrose agar. The diameter of the fungal colony was measured after 3‑, 5-, and 7‑day incubation periods. The results showed that the three active ingredients were effective at the recommended dose of 1000 ppm and at doses as low as 80 ppm. However, significant decreases in their effectiveness were detected at much lower doses of 40 and 20 ppm. The active ingredient pyrimethanil was the standout fungicide in terms of efficacy rates, package size, price stability, and time between the last application and harvest. The results of this study can help reduce production costs and residue risk.