Genótipos de tomateiro do tipo salada de crescimento determinado resistentes ao ácaro-rajado e à mosca-branca

Abstract

The demand for salad-type tomato hybrids, presenting determinate growth habit, for “in natura” consumption, has risen considerably in Brazil. Despite its potential, tomato cropping must deal with arthropod pests during its entire cycle. Hence, the wild tomato species Solanum pennellii has been used in order to obtain resistant genotypes. However, there has been few research on developing resistant genotypes, with determinate growth habit. For this reason, this study aims at selecting determinate genotypes with high levels of acylsugars and at evaluating their repellence levels to spider mites and silverleaf whitefly. During the experiment, 13 treatments were evaluated, being 10 genotypes of F2RC1 generation and three check treatments – two of them is cultivated tomato (cv. Santa Clara and UFU-057) and the third is the wild species S. pennellii (LA-716). The levels of acylsugars, trichome density and the repellence levels of resistance to spider mites and silverleaf whitefly were assessed. The genotypes UFU57-F2RC1#112 and UFU57F2RC1#101 are more relevant and present the highest levels of acylsugars and satisfactory levels of repellence to pests.