Data/hora: 02/06/2024 05:42:13

Provedor de dados: | 82
País: | Brazil
Título: | Developmental stress by diflubenzuron in Haematobia irritans (L.) (Diptera: Muscidae)
Autores: | Silva,Juliana J. da; Mendes,Júlio; Lomônaco,Cecília.
Data: | 2004-04-01
Ano: | 2004
Palavras-chave: | Insecta; Pest control; Horn fly; Insect growth regulator; Fluctuating asymmetry.
Resumo: | This study aimed to assess the effect of sub-lethal concentrations of the insect growth regulator (IGR), diflubenzuron, on the body size of the horn fly Haematobia irritans (L.) and on its developmental stability, by fluctuating asymmetry (FA) analysis. Breeding media with different sub-lethal diflubenzuron concentrations and a control medium, were prepared to obtain morphometric measures on adult individuals. Principal component analysis was used to generate an index of general body size, using the correlation matrix of the original characters. Levels of FA and the multivariate index of size were compared among treatments. Contrary to the expectations, the exposure to diflubenzuron did not result in a significant and concomitant increase in the level of FA across treatments or in the number of individuals showing developmental instability. Nevertheless, a significant reduction of size due to the diflubenzuron may reflect the ability of H. irritans to perform physiological and morphological adjustments allowing phenotype compensation, at least to some extent, for stressful environmental conditions. On the other hand, the IGR may be selecting more symmetrical and resistant individuals. From the pest control point of view, the reduction of size may be a positive effect of the IGR since size is usually directly related to fitness.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000200017
Editor: | Sociedade Entomológica do Brasil
Relação: | 10.1590/S1519-566X2004000200017
Formato: | text/html
Fonte: | Neotropical Entomology  v.33 n.2 2004
Fonte: | info:eu-repo/semantics/openAccess