Neotropical Entomology (2001) 30, 417-421

Teresinha A. Giustolin, José D. Vendramim, Sérgio B. Alves and Solange A. Vieira (2001)
Patogenicidade de Beauveria bassiana (Bals.) Vuill. sobreTuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) Criada em Dois Genótipos de Tomateiro
[Pathogenicity of Beauveria bassiana (Bals.) Vuill. to Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) reared on two genotypes of tomato]
Neotropical Entomology 30 (3), 417-421
Abstract: Tuta absoluta (Meyrick) larvae were fed on tomato leaves Lycopersicon hirsutum f. glabratum (PI 134417, resistant) and L. esculentum (cv. Santa Clara, susceptible) in order to obtain different instar larvae. Bioassays with tomato leaves of both genotypes untreated and treated with Beauveria bassiana (Bb) were conducted for each larval instar. Daily mortality was evaluated until the end of the larval phase. Feeding on PI 134417 reduced the larval survival of T. absoluta. When Bb was applied to the two genotypes of Lycopersicon, mortality occurred in all T. absoluta instars. Application of Bb on tomato leaves resulted synergistic or additive effects with the resistant genotype on larval survival. These effects depended on the instar the larvae fed on Bb-treated leaves.

Lagartas de Tuta absoluta (Meyrick) foram criadas em folhas de tomateiro Lycopersicon hirsutum f. glabratum (PI 134417, resistente) e L. esculentum (cv. Santa Clara, suscetível) até atingirem diferentes ínstares. Para cada um dos ínstares, foi desenvolvido um experimento no qual as lagartas foram alimentadas com folhas dos dois genótipos tratadas com suspensão de conídios de Beauveria bassiana (Bb). A mortalidade foi avaliada diariamente até o final da fase larval. A alimentação de T. absoluta sobre o genótipo PI 134417 reduziu a sobrevivência larval. A aplicação de Bb nos dois genótipos de Lycopersicon provocou mortalidade em todos os ínstares. Entretanto, Bb inoculado no genótipo resistente provocou efeito sinérgico ou aditivo na sobrevivência larval. Este efeito foi dependente do ínstar em que as lagartas foram alimentadas com folhas tratadas com o fungo.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): José Djair Vendramim, Sérgio Batista Alves

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
resistance/tolerance/defence of host
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Phthorimaea absoluta	Tomato (Solanum lycopersicum)
Beauveria bassiana (entomopathogen)	Phthorimaea absoluta	Tomato (Solanum lycopersicum)