Abstract

ZURITA VASQUEZ, Hernán et al. Efficiency of using insecticide plants on control of maize weevil, Sitophilus zeamais Motschulsky, (Coleoptera: Curculionidae). Investig. Agrar. [online]. 2017, vol.19, n.2, pp.120-126. ISSN 2305-0683.  https://doi.org/10.18004/investig.agrar.2017.diciembre.120-126.

The maize weevil, Sitophilus zeamais, is an economic important pest in stored grains, thus alternative and safe methods of control are required. In this study, the effect of plant powders on mortality of the maize weevil, final weight of corn kernels, number of perforated corn kernel, and weight of waste material were evaluated in laboratory conditions. Powder obtained from four plant species [Ruta graveolens (ruda), Urtica dioica (ortiga), Ambrosia arborescens (marco) y Buddleja globosa (matico)] was evaluated used at 5% w/w and then compared to a conventional insecticide (Malathion used as positive control) and to a negative control, to which no application was made. For this purpose, 150 g of kernels were used and infested with 20 adult weevils, which were treated with 7.5 g of the respective plant powder. Experiment was carried out in a completely randomized design. The ruda and marco caused percentage of mortality on the maize weevil of 53.35 and 41.65%, respectively, suggesting that these plant species could be used in combination with other management strategies in stored grains. However, studies dealing with effect of different concentrations are required in order to optimize their use.

Keywords : weevils in stored grains; alternative control; efficiency..

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