Rio Grande do Sul has the largest area of vine cultivation on Brazil, in this State, Campanha region has soil and climate suitable characteristics to produce grapes cultivars of European origin and presented in the first decade of this millennium a great expansion in area. Since 2005, the grape rust mite Calepitrimerus vitis is now frequently found in vineyards in Campanha region. In countries where this species is established, significant reductions on grape production are observed and the need for control is constant, so far there are not approved products in Brazil for the C. vitis control. This study aimed to evaluate various pesticides on the efficiency of C. vitis control in a commercial vineyard in Campanha region from Rio Grande do Sul. The experiment was conducted during the years 2008 and 2009 comparing the level of infestation in plants using sticky traps. In 2008, the level of control during the fall did not differ from the control. The sulfur used in a single spray in autumn or in two sprays, being one in the fall and another in the spring, was efficiently to control C. vitis in the spring. Abamectin and spirodiclofen acaricides were efficient in C. vitis controlling in spring, applying only a single spray in the spring or applying two sprays, one in the autumn and another in the spring, in the fall of 2009, the miticides cyhexatin and spirodiclofen treatments were effective in C. vitis controlling. The grape-rust-mite is effectively controlled with cihexatin, sulfur or spirodiclofen pulverizations in the fall or abamectin, sulfur or spirodiclofen sprays during the spring.
Chemical control; Acaricides; autumn treatments; Vitis vinifera; Grape-rust-mite
