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|Título:||Characterization of Southern New Mexico Phytophthora capsici Leonian Isolates from Pepper (Capsicum annuum L.)|
|Editorial:||Sociedad Mexicana de Fitopatología, A.C.|
|Descripción:||Phytophthora capsici was first identified in the Mesilla Valley of southern New Mexico in 1922. There is limited information about its diversity or the potential for sexual recombination from this region. Characterization of isolates from southern New México showed the coexistence of both compatibility types A1 and A2 in a single field with A1 occurring more frequently. In vitro tests showed that the optimum temperature for vegetative growth was between 25 and 30°C and hyphal swellings were observed at 37°C. Most isolates were sensitive to mefenoxam (100 µg/ml), but sensitivity to CuSO4 (30 µg/ml) varied among isolates. Only 7 of 26 P. capsici isolates were pathogenic to cucumber, 24 were virulent on pepper and no consistent pattern was observed on tomato. Based on isozyme analysis and mating type, 16 multilocus genotypes were detected within southern New Mexico isolates. The proximity of both compatibility types in the field, genotypic diversity, and variable fungicide resistance, suggest that sexual reproduction is taking place.|
|Aparece en las Colecciones:||Revista Mexicana de Fitopatología|
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