Fertilizantes foliares associados à fungicida no controle in vitro de Colletotrichum truncatum e Corynespora cassiicola

Abstract

The significant increase in the number of fungal diseases has been one of the limiting factors for the maximum yield of the main economically relevant crops. Considering that chemical control is the most used today, research on alternative control forms becomes indispensable. Thus, this work evaluated the interaction between foliar fertilizers and fungicide for in vitro control over the phytopathogens Colletotrichum truncatum and Corynespora cassiicola. Isolates of soybean C. truncatum (CN-1) and cotton C. cassiicola were used. The experiment was carried out using a completely randomized design with the following treatments: control (negative control); Fox; Fox+Smart Cobre (0,4 L/ha); Fox+Smart Cobre (0,8 L/ha); Fox+TriTek; Fox+Protector DC (0,75 L/ha); Fox+Protector DC (1,00 L/ha); Fox+Protector DC+Smart Cobre; Fox+Protector DC+Smart Cobre + TriTek and Fox+Unizeb Gold. The area below the mycelial progress curve (AACPM), growth rate (TC), mycelial growth inhibition, sporulation inhibition and spore germination inhibition were evaluated. The interaction between foliar and fungicide fertilizers was efficient in the in vitro control of Colletotrichum truncatum and Corynespora cassiicola.