Evaluation of fungicides for controlling antracnose (Colletotrichum gloeosporioides Penz) of mango (Mangifera indica L.) in postharvest
2001
Gutierez-Alonzo, J.G. | Nieto-Angel, D. | Telis-Ortiz, D. | Zavaleta-Mejia, E. (Fitopatolgia, Celaya (Mexico)) Vaquera-Huerta, H. | Martinez-Damian, T. | Delgadillo-Sanchez, F.
The resistance and the effectiveness of fungicides imazalil, prochloraz and azoxystrobin were evaluated in isolates of Colletotrichum gloeosporioides Penz collected from mango fruits affected by anthracnose in production regions of Veracruz, Guerrero, Micoacan, Sinaloa and Chiapas [Mexico]. Imazalil had problems of resistance that was over the treshold of the mean lethal dose (DL50) of 250 ppm in the isolated colony from Veracruz (39 ppm), meanwhile Micoacan (18 ppm) and Sinaloa (16 ppm) were close of reaching the treshold. Prochloraz and Veracruz (21 ppm) were over the treshold and Sinaloa (16 ppm) was also close. Azoxystrobin did not show problems of resistance, since its DL50 fluctuated between 0.000006 and 0.01 ppm in all isolates. The test for the control of anthracnose postharvest proved the presence of resistance, since Imazalil and the control had statistically equal effect (approximately 0.05%). Azoxystrobin had the lowest degree of severity in damage, with a low DL50 for the different isolates of C. gloeosporioides
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