Resistência de cultivares crioulos de milho pipoca A Spodoptera frugiperda

Abstract

The objective of this work was to evaluate the impact of eight Landrace maize popcorn genotypes (white, indigenous, brown, black, pink, purple, red, zapalote chico) on fall armyworm (Spodoptera frugiperda). The experimentation took place in three phases: larval, pre-pupa and pupa, in a total of 450 larvae, 50 for each treatment. These were kept on a diet consisting of a 5 cm piece of popcorn maize leaf and a cotton roll soaked in water. There was daily maintenance and the S. frugiperda were placed in a climate-controlled room with an ideal temperature. After 10 days the caterpillars were divided into 3 groups of 10 and their mass was measured on an analytical balance. The same method was repeated in the pre-pupa and pupa stages. At the end of the experiment, the results obtained were evaluated by analysis of variance and Tukey's test at 5% probability. Considering the values, the red and black genotypes found resistance to the attack of the parasite S. frugiperda, being an effective and cheaper option for maize cultivation and a great potential for breeding studies as a source of resistance to transgenic cultivars.