EFICIÊNCIA DE FUNGICIDAS PARA O CONTROLE DA MANCHA BRANCA DO MILHO

The white spot is a major disease of corn nowadays. Genetic resistance and fungicide application areconsidered the most important procedures to control this disease and the most used by producers.. However, reportsof low efficiency of control with different chemical fungicides have been frequent, which has generated doubts aboutits effectiveness in controlling the disease in the field. In the present study, four experiments were conducted in fieldconditions, using cultivars with different levels of resistance or susceptibility to maize white spot. The efficiency ofdifferent chemical groups of fungicides in the management of maize white spot was evaluated using different numberof applications. The results demonstrated that the strobilurin fungicide group presented the greatest efficiency incontrolling the disease. The fungicides triazole, carbendazim and thiophanate and the antibiotics oxytetracycline andkasugamycin showed low control efficiency.