The objective of this study was to evaluate the effects of a biofertilizer associated or not with biological and chemical products under different irrigation systems upon the yield of staked tomato and the occurrence of the "small fruit borer". The experiments were carried out at Itabaiana county, Sergipe State, Brazil, during the dry and wet seasons, on a randomized blocks design with 13 treatments and four replications. Each plot contained 48 plants, with two branches, spaced by 1.00 x 0.50 with one plant of two stems. The efficiency of the treatments varied according to the seasons and to the irrigation systems. Total and commercial yields in the wet season were respectively, 82 and 59% greater than the ones obtained in the dry season, also with a higher average fruit weight. Percentage of drilled fruits was significantly higher in the wet season than in the dry season. Best treatments for the dry season were: a) sprinkler irrigation: Bacillus thuringiensis variety Kurstaki (Btk) alone or in combination with clorfluazuron; deltametrina + clorfluazuron and biofertilizer + Btk; b) drip irrigation: Btk + clorfluazuron. For the wet season sowing the best treatments were: a) sprinkler irrigation: Btk + clorfluazuron; biofertilizer + tefluazuron and clorfluazuron, and b) drip irrigation: biofertilizer + clorfluazuron and biofertilizer + abamectin.
Lycopersicon esculentum; Bacillus thuringiensis; Neoleucinodes elegantalis; sprinkler irrigation; drips irrigation; tomato
