1Soil Microbiology and Pesticides Laboratory, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad-431 004
Botany Research Centre, Vasantrao Naik Mahavidyalaya, Aurangabad – 431 003
1Present address: 5, Vinayasree, Nandanwan Colony, Aurangabad -431 004
Continuous use of carbendazim, difenoconazole and propiconazole has led to development of resistance in Gloeosporium ampelophagum. Among 37 isolates of pathogen, 97.30% population was highly resistant to carbendazim (MIC 1.01 to 28549.43 µg/ml), 5.41% to difenoconazole (MIC 25.63 µg/ml) and 10.81% to propiconazole (MIC 6.26 µg/ml). It was observed that the development of resistance against difenoconazole and propiconazole was increased when compared with carbendazim. Highly resistant population is less in both difenoconazole and propiconazole fungicides. It was noted that difenoconazole and propiconazole are yet suitable for the management of G. ampelophagum where selection pressure is less when compared with carbendazim. Carbendazim became unsuitable due to development of high resistance in G. ampelophagum. However, there will be future need to develop ëresistance management strategyí against difenoconazole and propiconazole.
Fungicide resistance, Gloeosporium ampelophagum, benzimidazole, DMI
