Effect of fungicides and biological products in controlling rust and gray mold in grapevines

Grape rust and gray mold are diseases in grapevines with high destructive potential. In this study, the effectiveness of different fungicides biological products controlling these was evaluated using cultivar “Niágara Rosada” municipality Louveira-SP, from February to April 2017. A randomized block design used, 10 treatments four replicates five plants per plot. Each treatment applied nine times at weekly intervals, application volumes range 400–1000 L/ha. The evaluation criterion for severity, based on percentage leaf area affected by disease (0 100%), whereas incidence diseased bunches 100%). All were effective both significantly reduced experimental plot compared that control plots. best obtained treating boscalide+pyraclostrobin (1 L c.p./ha), which superior fluxapyroxade+pyraclostrobin (0.5 L) + Bacillus amyloliquefaciens kg), B. Melaleuca alternifolia essential oil (1.5 L), dimoxystrobin+boscalide L). treated fluxapyroxad+pyraclostrobin kg) had a lower than did those boscalide+kresoxim methyl piremethanil These results suggest use M. may represent an important tool management grapevines.