Effect of Biostimulants in Late Seeding of Genotypes of Zea mays L.

Seed treatment has as its main feature the prevention of pest entry in cultivated areas, besides being of great importance in the development of vigorous and healthy plants. The objective of this work was to evaluate the performance of corn genotypes with biostimulant in seed treatment under water stress environment. The experimental design was randomized blocks in a 3x3 factorial scheme, corresponding to three corn genotypes (P3707, P30S31 and P30F35) and three seed treatments with the biostimulants (ConrSeeds, Stimulate and Água). The experiment was carried out at Luiz Eduardo de Oliveira Sales Experimental Farm, located in the municipality of Mineiros, Goiás, from March 2018 to August 2018. Plant height, stem diameter, ear insertion height, number of rows per ear, number of grains per row, number of grains per ear and yield were evaluated. The obtained data was submitted to the assumptions of the statistical model, verifying the normality and homogeneity of the residual variances, as well as the additivity of the model, testing univariate and multivariate analyzes. Analysis of variance revealed significance only for the main genotype effect. Seed treatments did not improve yield components of corn genotypes. The genotypes differed, where the variables number of rows per ear, number of grains per row and number of grains per ear directly influenced the grain yield.