Monitoramento da incidência de doenças no desempenho de híbridos de tomate em Sinop/MT

Abstract

Among the vegetables cultivated, the tomato (Solanum lycopersicum) is worldwide the biggest culture in volume industrialized and the second biggest culture in planted area. The tomato plant is vulnerable to the attack of several diseases caused by viruses, bacteria, fungi and nematodes which can reduce the production. Due to the big demand of the culture it is necessary that a bigger control of coming disease exist. Before that, this work had as objective to evaluate the tomato hybrids on the land, verifying the incidence of diseases and productivity. The experiment was conducted in the city of Sinop/MT, from February to July 2015, with hybrids of different companies, using a randomized complete block, drip irrigation, with 15 treatments and 4 repetitions of 32 plants totalizing 1920 plants evaluated in greenhouse. These were transferred to an area of 825m² in open field for evaluations of diseases and productivity placed in Vitale Company. We verified that the seeds produced in the greenhouse were affected by Anthracnose (Colletotrichum spp.) and Early Blight (Alternaria solani), which were controlled with chemical products, reducing the number of deaths. In the production field all the hybrids were affected by the Bacterial Wilt (Ralstonia solanacearum), being the hybrid BOSS the most susceptible to the bacteria disease and, the most resistance hybrid with lower incidence of disease was the H 9553. After this we can conclude that the production of land tomatoes is not practicable in big scale in the region of Sinop due to the big index of diseases which affected the field, influencing directly in the production.