BIOCONTROLE DA MANCHA BACTERIANA EM TOMATE PARA PROCESSAMENTO POR Bacillus velezensis GF267. (BACTERIAL SPOT BIOCONTROL IN TOMATO FOR PROCESSING BY Bacillus velezensis GF267)

Abstract

This study aimed to evaluate the performance of new alternatives for the control of tomato bacterial spot using Bacillus velezensis GF267 biological product compared to products already registered for this purpose. The experiment was conducted in the experimental area, located in the Instituto Federal Goiano Campus Morrinhos, with cultivation of Heinz 9553 hybrid. The experimental design was a randomized block design with 6 replications and 5 treatments, T1-control, T2- Bacillus velezensis GF267 (1x109 CFU / mL, 5 L / ha), applied via foliar spray, T3- Bacillus velezensis GF267 (1x109 CFU / mL, 5 L / ha) drenched, T4-copper hydroxide (Kocide®, 1.5 kg / ha), T5-acibenzolar-S-methyl (Bion®, 25 g / ha). The plot consisted of 3 lines with 5 m long. Applications started at 7 days after transplantation (DAT) using a pressurized CO2 spray with 500 L / ha flow rate, totaling 8 applications with 7 days interval. Plants were inoculated with Xanthomonas perforans isolate at a concentration of 5x107 CFU / mL at 60 DAT. Severity assessments began 7 days after inoculation with a total of 8 assessments. We used 10 centerline plants for severity and productivity assessments. The biological product, in applications via leaf and drench, is very efficient in controlling tomato bacterial spot.