Resistance mediated by alelochemicals of tomato genotypes to the silverleaf whitefl y and to two-spotted spider mites

• Autor(a) principal: Silva, Vanisse de Fátima
• Data de Publicação: 2010
• Outros Autores: Maluf, Wilson Roberto, Cardoso, Maria das Graças, Neto, Álvaro Carlos Gonçalves, Maciel, Gabriel Mascarenhas, Nízio, Daniela Aparecida Castro, Silva, Vânia Aparecida
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/2088
• topic: Bemisia argentifolii; Lycopersicon esculentum; Tetranychus urticae; allelochemicals; varietal resistance; sesquiterpene; Bemisia argentifolii; Lycopersicon esculentum; Tetranychus urticae; aleloquímicos; resistência varietal; sesquiterpeno

The objective of this work was to assess the degree of resistance to the whitefly (Bemisia argentifolii) and to the two-spotted spider mite (Tetranychus urticae) of tomato hybrids resulting from crosses between high-zingiberene (ZGB) lines and high-acylsugar (AS) lines, as compared to their parental lines and to commercial vouchers. High-AS lines, high-ZGB lines, double heterozygous (ZGB+AS) hybrids, hybrids heterozygous for ZGB and hybrids heterozygous for AS were tested. The wild accessions PI 127826 and LA-716 were used as high-ZGB and high-AS vouchers, respectively, while the genotypes Debora Max and TOM-684 were used as vouchers for low ZGB and AS. The genotypes were submitted to resistance tests to the whitefly and repellency to the spider mite. Double heterozygous (ZGB+AS) hybrids were more resistant to whiteflies than the commercial vouchers, but less resistant than the high-ZGB or the high-AS lines. Double heterozygous (ZGB+AS) hybrids were more repellent to the spider mite than the commercial vouchers, and their repellency to mites was similar to that of high-ZGB or high-AS lines. There was no synergistic effect between ZGB and AS, for both resistance to the whitefly and repellency to the two-spotted spider mite, in the double heterozygous (ZGB+AS) genotypes.