Ensayos con el producto biológico gluticid para el control de Alternaria solani y Cladosporium fulvum en el tomate en casas de cultivo protegido
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Abstract
Early blight (Alternaria solani Sor) and gray mildew (Cladosporium fulvum Cke.) are the mayor fungal diseases in the protected cultivation of tomato (Lycopersicum esculentum Mill) in Cuba. In order to offer new alternative for their control, it was proven the efficiency of a biological fungicide Gluticid, obtained in Cuba by biotechnological process, and recommended for the control of air borne fungal disease. The trials were realized in Cienfuegos province, in protected cultivation houses, on the varieties Aro 84-84 and HA 31-08, with the variants: Gluticid (40 mg/g ) to 0.08 Kg i.a./ha., mancozeb (Mancozeb 80 PH) to 2,4 Kg i.a./ha and tebuconazol (Orius 25 CE) to 0,25 Kg i.a./ha. It was used a thoroughly randomized design with plots of two ruts of 30 m long. Treatments began seven days after the cultivation were planted, with a frequency of 4-5 days for contact fungicides, including the biological, and 9-10 days for systemic product. The infection intensity was evaluated in 20 plants per plot, according to a scale of 0 to 5 degrees. The intensity of A. solani in variety Aro 84-84 raised a value of 60.25% in the plots treated with mancozeb at 60 days, and 58.25% in the variant protected with the biological product, without statistical difference in the efficiency between both treatments. The corresponding variant to the biological product resulted more effective than the mancozeb variant for the control of C. fulvum, with values of 15.75 % and 20.25 % of intensity, respectively, in 60 days of cultivation. Similar results were obtained in the variety HA 31-08. The efficiency of Gluticid against the two diseases indicates the possibility of its introduction for the management of A solani and C. fulvum in tomato crop under these conditions.
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References
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