Antibiosis of eight Lycopersicon genotypes to Tuta absoluta (Lepidoptera: Gelechiidae)

• Autor(a) principal: Moreira, Luciano Andrade
• Data de Publicação: 2009
• Outros Autores: Picanço, Marcelo Coutinho, Silva, Gerson Adriano, Semeão, Altair Arlindo, Casali, Vicente Wagner Dias, Campos, Mateus Ribeiro de, Fernandes, Maria Elisa de Sena, Xavier, Vânia Maria
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://www.ceres.ufv.br/ojs/index.php/ceres/article/view/3425; http://www.locus.ufv.br/handle/123456789/20532
• topic: Solanaceae; Tomato; Tomato leafminer; Plant resistance

Tomato leafminer [Tuta absoluta (Meyrick)] is the most important pest in a numerous regions of tomato production in Brazil. Wild species of Lycopersicon, such as L. hirsutum and L. peruvianum have been used in breeding programs in the attempt of obtaining tomato cultivars with resistance to pests. In this paper, is reported a study on the development and survival of T. absoluta under laboratory conditions on eight tomato genotypes: L. esculentum cv. Santa Clara, L. pimpinellifolium (PI 126931), L. peruvianum (PI 306811; PI 128659; LA 444-1; BG 3286; CNPH 374) and L. hirsutum f. glabratum (PI 134417). Newborn caterpillars were ndividualized in glass tubes with sand where a leaflet petiole was fixed (petioles per glass). The tubes were covered with PVC film and maintained inside a seed incubator at 25° C and 70% relative humidity. Caterpillar development was observed when leaflets were changed, every 3 days, until the second insect generation. Genotype effect on caterpillar mortality was observed only at the second generation (90% on PI 134417 against 33.3% on Santa Clara). PI 134417 caused pupae mortality of 50.68% and 100%, at the first and second generations, respectively, confirming their antibiosis effects. Mortality of genotype Santa Clara was12.12% of pupae, at the second generation. The oviposition period was 5.5 and 8.5 days on PI 134417 and Santa Clara, respectively. The longest developmental period of caterpillars occurred on L. peruvianum and L. hirsutum f. glabratum.