INTERAÇÕES DE COMPONENTES FITOSSANITÁRIOS E PATOLOGIA DE SEMENTES HÍBRIDOS DE MILHO (Zea mays)

Abstract

The numbers are complex of biotic and abiotic agents that cause damage to different corn hybrids causing damage to production and transfer as inoculum seeds for dissemination. The objective of this work was to evaluate the temporal progress of phytosanitary (PP) and its relationship with morpho-agronomic aspects of maize and field hybrids. 22 different corn hybrids were used, sown in a delaying in casualized blocks (DCB). At 55, 79, 86, 114 and 121 days after sowing (DAS), they were submitted to phytosanitary severity (PSV) through binary variables, connoting the absence or presence of phytosanitary products, allowing the construction of progress methods and calculation of the area under the phytosanitary progress curve (AUDCP) and lesion growth rate (LGR), in addition to morpho-agronomic measures, the data were analyzed by principal component analysis (PCA) and canonical correlation analysis (CCA). As seeds of these hybrids, they were harvested at 121 (DAS) and submitted to the “Blot test” in a fully casualized delievement (FCD) with 10 repetitions (25 seeds per repetition), in which percentages of primary root emission (PRE),% incidence of microorganisms (IM) and% of genera of fungi that were statistically similar to field trials. It was concluded that the hybrid most resistant to damage was the hybrid 8882 Cod. DKB, in addition to having a higher number of records and also presenting a lower incidence of microorganisms associated with the 345 PRO 3 DKB hybrid.