Phytosanitary status in vine, cultivar BRS Vitória, Petrolina-PE

Abstract

The vine is a plant of the Vitaceae family, and originally from Asia. As it is the main crop of economic importance in the São Francisco Sub-Medium Valley, it is necessary to use phytosanitary management and monitoring practices to assist the producer in prevention and control, aiming to reduce economic damage to the vine. Therefore, the objective of this work was to verify the percentage of infestation of the main pests and diseases that affect the vine, cultivar BRS Vitória. The work was developed in a commercial area, in Petrolina-PE. Twenty plants were sampled weekly, from August/2021 to May/2022, using the methodology and action level of the Integrated Production of Fine Table Grapes (PI Grape). For rust, ripe grape rot, red spider mite, leafhopper and South American vine moth, a methodology adapted from the PI Grape was used. In the monitoring, the incidence of powdery mildew, mildew, rust, leaf caterpillar and leafhopper was detected in leaves; in inflorescence, the presence of thrips was observed, and in bunches, powdery mildew and honeydew moth. Rainfall and relative air humidity influenced the incidence of powdery mildew, rust and leaf caterpillar. In the resting phase, the highest rates of powdery mildew, rust, leaf caterpillar and leafhopper were detected. The incidence levels for powdery mildew, mildew and honeydew moth are within the values recommended by PI Grape. For rust and leafhopper, the levels adopted can be used as an indicator for decision-making in chemical control. These results are expected to provide subsidies to producers to improve the management of grapevine pests and diseases.