SciELO - Scientific Electronic Library Online

 
vol.33 número2Seletividade de inseticidas para o ácaro parasita Acarophenax lacunatus (Cross & Krantz) (Prostigmata: Acarophenacidae) em Rhyzopertha dominica (Fabr.) (Coleoptera: Bostrichidae)Sand flies fauna involved in the transmission of cutaneous leishmaniasis in Afro-Colombian and Amerindian communities of Choco, Pacific Coast of Colombia índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Neotropical Entomology

versão impressa ISSN 1519-566Xversão On-line ISSN 1678-8052

Resumo

SILVA, Juliana J. da; MENDES, Júlio  e  LOMONACO, Cecília. Developmental stress by diflubenzuron in Haematobia irritans (L.) (Diptera: Muscidae). Neotrop. Entomol. [online]. 2004, vol.33, n.2, pp.249-253. ISSN 1678-8052.  https://doi.org/10.1590/S1519-566X2004000200017.

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.

Palavras-chave : Insecta; pest control; horn fly; insect growth regulator; fluctuating asymmetry.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons