Sanidade de sementes de soja tratadas quimicamente - safra 2017/2018

Abstract

The seed is the most important input to ensure a good crop establishment in the field, so the use of certified seeds free of pathogens that may affect their quality is necessary. This study examines the sanitary quality of soybean seeds containing the chemical treatment and also compares the health methods: incubation on agar-water and filter paper (blotter test). The seeds analyzed were provided by Mato Grosso State producers totaling 18 lots of cultivars Bonus Ipro and TMG2185Ipro treated with commercial products Standak® Top and Fortenza Duo. In the phytosanitary evaluation seeds were disinfected and submitted to sanity tests, incubated for 7 days with 12 hours photoperiod, 400 seeds being used in each batch with 16 repetitions. After incubation, the seeds were analyzed one by one to determinate the percentage incidence of contaminated seeds. The analysis data was tabulated in a randomized factorial 2x18 (Methods 2 and 18 batches) were subjected to ANOVA and the Scott-Knott test at 5% probability. The main fungi associated with seeds were Cercospra kikuchii, Aspergillus sp., Penicillium sp., Fusarium sp., Colletotrichum truncatum, Choanephora sp. and Cladosporium sp., and the sanity check blotter test method top agar to water only for C. kikuchii and bacteria. With respect to chemical treatment, it was effective only for Choanephora sp., And showed low efficiency in controlling C. kikuchii.