Tomato late blight: Severity and losses in different cultivars in organic system
Journal Title: Revista Verde de Agroecologia e Desenvolvimento Sustentável - Year 2017, Vol 12, Issue 1
Abstract
In view of the damage caused by late blight (Phytophthora infestans) on tomato and the difficulties in controlling this disease in organic systems, it was aimed quantify their progress and effects on production on ten tomato cultivars under organic system. Eight cultivars and two standards, Débora Plus and Perinha Água Branca (PAB), susceptible and resistant to disease, respectively, were evaluated. Quantified the severity of the disease in ten evaluations and were calculated the areas under the curves progress of the disease (AUDPC). The production was measured in six harvests and, based on these, were determined productivity, the number and fresh weight average of the fruits and their commercial quality. Was adopted design of randomized blocks with four replications. The Lumi, Serato, Dominator and Forty hybrids presented AUDPC significantly higher than the standard Débora Plus (579.27), while Mascot was statistically equivalent to this. Lower severity was observed in Santa Clara, Kada and Jumbo (183.50 to 250.56), which did not differ from resistant standard, PAB (14.74). Productivity, total and commercial, of Lumi, Serato, Forty and Dominator hybrids was equivalent or lower than older cultivars, as Kada, and cherry group cultivars such as Mascot and PAB. The cultivar PAB, despite the lower total yield (0.69 kg.plant-1), marketable yield (0.65 kg.plant-1) showed equivalent or higher than that of most varieties (0.32 to 0.67 kg.plant-1). The Lumi, Serato, Dominador and Forty hybrids was highly susceptible to late blight and can have their productivity severely compromised by the disease in organic systems.
Authors and Affiliations
Carlos Antônio dos Santos, Evandro Silva Pereira Costa, Margarida Goréte Ferreira do Carmo
Keywords
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- EP ID EP253497
- DOI 10.18378/rvads.v12i1.4448
- Views 99
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