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
Related Articles
- EP ID EP253497
- DOI 10.18378/rvads.v12i1.4448
- Views 107
- Downloads 0
Phytogeographical survey of Dalbergia l.f. (Leguminosae-papilionoideae) with productive potential for red propolis in the state of Pará
The genus Dalbergia L.f. (Leguminosae-papilionoideae), with pan tropical distribution which comprises about 250 species. Dalbergia have been widely exploted for the production of red propolis, which consists of a complex...
Seedlings of Mimosa caesalpiniaefolia Benth (Leguminosae: Mimosoideae) grown on organic substrates
Success in growing forest species, such as sage (Mimosa caesalpiniaefolia Benth), depends essentially on the use of good quality seedlings. At this stage of production, several materials have potential for use, mainly, o...
Water quality for use in agroecological cultivation of vegetable crops
Several anthropic activities provide wastes and rejects in ecosystems mainly aquatic, and usually inadequately. As a result there can be increases in the amount of nutrients mainly of phosphorus and nitrogen making a med...
Recovery of springs: Formation of environmental multipliers in degraded area of Rural Settlement, Eldorados dos Carajás, Pará
In Southeast Pará, the agricultural and mining fronts, when inserted in the productive base of the state, increased the exploitation of natural resources available in the region, which raised the levels of environmental...
Atributos químicos do solo em sistema agroflorestal de gliricídia consorciado com palma forrageira
In this study, we aimed to assess the chemical attributes of a soil fertilized with organic matter, in an agroforestry system. The experiment was carried out at the Miguel Arraes agricultural experiment station of the Na...