Práticas agroecológicas para o manejo da mancha-alvo do tomateiro, causada por Corynespora Cassiicola (Berk. e Curt.). Wei.

Abstract

The "Spot Target" caused by Corynespora cassiicola (Berk. e Curt.) Wei. is the most important air disease of tomato in the northern region of Brazil affecting leaves, stems and fruits. The experiment conducted at the Horticultural Experiment Station Dr Alejo von der Pahlen, of the National Institute of Amazonian Research (INPA). The test was conducted in split-split-plot design with 36 treatments and three replications. The treatments were: I) Sawdust as mulch more Bacillus cereus; II) Sawdust more Trichoderma harzianum; III) Only sawdust (control). The level of the split-plot was estimated effects due to management of plants: I) thinning of the side branches; II) Roughing side and removed leaves with symptoms of the diseases e and III) Branches plants unmanaged. The level of split-split-plots were estimated effects due to treatment: I) Spray with fungicide estrobirulina base (Cabrio® Top 2 g/l water): II) spray with aerobics biofertilizers; III) Spraying with calcium silicate (Barrier® Cosmoce 2 ml/ 1l water); IV) Spraying with water (control).The treatment coverage was not significant in the target spot ID. Biological agents have not been effective in disease control, however, T. harzianum reflected in the production character. The management of treatment was significant in ID and production character, assigned lower ID to plants subjected to thinning and removal of leaves with symptoms of the disease, however, the plants without managements had higher productivity, as well as, the increase of commercial fruit. Plants sprayed with fungicides showed lower ID and infection rate (r), the target spot, an increase in fruit production. Plants sprayed with calcium silicate had an increase in production of commercial fruit and fruit produce less waste as compared to plants sprayed with water. There were no significant effects of biofertilizer on the ID and characters production of tomato plants.