LEITE, C. M. F.; http://lattes.cnpq.br/9560628182378177; LEITE, Camila Maria Formiga.
Resumo:
The Cowpea represents a strategic food source for the high levels of proteins,
carbohydrates and mineral salts and adaptation to adverse environmental conditions.
There are plagues capable of attacking grains/beans stored, and the most important of
these in Brazil is the Callosobruchus maculatus (Coleoptera: Bruchidae), stand out to
attack perfect seeds due to its derogatory potential, bringing bad quality grains and
consuming nutrient reserves of the embryo. The most widely used control method
against pests is the use of chemical products of different toxicological classes. Although
these products have a lot of efficiency, its use can cause problems if it’s intensified, then
the use of plants with insecticidal activity became so important, being generally applied
in the form of powders, extracts or oils. On the exposed, this work aimed to evaluate the
effect of insecticide and repellent herbs used in popular culture as the medical control of
Callosobruchus maculatus in Cowpea beans, (Vigna unguiculata L.) under laboratory
conditions, analyzing the lethal dose (Ld50) and lethal time (TL50) of these weevils in
relation to those medicinal herb powder (Melissa officinalis (balm), Peumus boldus
(boldo), Maytenus ilicifolia (espinheira-santa), Mentha (Mint). The experiment was
conducted in the laboratory of Entomology, Federal University of Campina Grande
(UFCG), Campus Pombal, Paraíba, Brazil. Cowpea beans were treated with powders at
concentrations of 5.0 grams and different doses of 0.25, 0.50, 0.75 and 1.0%
(mass/mass of powder grains) and preferably tests and survival against c. maculatus. As
regards the Lemongrass repellency, Boldo and Mint insects exhibited repellent
properties, better specifying the insects did not have the same preference. The
Maytenus, the bugs proved attractive/preferences. In referring to the survival every
species have caused mortality at any given period of time.
