Diagnosis and Integrated Management of Fruit Rot in , Caused by .

Fruit rot is the principal phytopathological problem of pipiana pumpkin ( Huber) in the state of Guerrero. The aims of this research were to 1) identify the causal agent of southern blight on pumpkin fruits by morphological, pathogenic, and molecular analysis (ITS1, 5.8S, ITS2); 2) evaluate spp. strains and chemical fungicides; and 3) evaluate under rainfed field conditions, the strains that obtained the best results , combined with fungicides during two crop cycles. Number of commercial and non-commercial fruits at harvest, and seed yield (kg ha) were registered. Morphological, pathogenic and molecular characterization identified as the causal agent of rot in pipiana pumpkin fruits. Now, conditions, the highest inhibition of were obtained by strain G-41 (70.72%), strain CSAEGro-1 (69%), and the fungicides metalaxyl (100%), pyraclostrobin (100%), quintozene (100%), cyprodinil + fludioxonil (100%), and prochloraz (100%). Thiophanate-methyl only delayed growth (4.17%). In field conditions, during the spring-summer 2015 cycle, strain CSAEGro-1 + metalaxyl, and + cyprodinil + fludioxonil, favored the highest number of fruits and seed yield in the crop.