Reproduction and preference of Callosobruchus maculatus (Fabricius) (Coleoptera: Bruchidae) extracts of Caesalpinia pyramidalis Tul.

Abstract

Vigna unguiculata L. in the different stages of production suffers from various phytosanitary
problems, especially in the storage phase. In this phase the main pest is Callosobruchus maculatus
F. (Coleoptera: Bruchidae), which is generally controlled with pesticides in the form of
fumigation. Considering this context, this work had the objective of evaluating the oviposition
and repellency of C. maculatus in bean grains treated with extracts of different parts of catingueira
(Caesalpinia pyramidalis). 20 g of cowpea beans were added and 0, 1, 2 or 3 g of the
vegetal powder of bark, pods and leaves and a couple of C. maculatus per experimental unit
were added to the oviposition bioassays. The repellency tests were carried out in arenas with
containers at the ends, where 15 g of beans treated with 1.5 g of the extracts were conditioned
and thirty insects of C. maculatus were released. The extracts from the barks and leaves of C.
pyramidalis influenced the reproduction and repellency of C. maculatus to the grains treated
with that extracts.