Efficacy of Piper auritum Kunth powder with drying variants on Sitophilus oryzae (L.) (Coleoptera; Curculionidae)

Abstract

The need to eliminate chemical products and the search for ecological alternatives for the control of pests in stored grains based on vegetable powders, motivated the determination of the effect of milled powders of Piper auritum Kunth on Sitophilus oryzae L. for this P. auritum was prepared in different variants and drying temperatures, in two phenological phases: vegetative and reproduction-flowering, dried in the sun and shade, in three temperatures (35, 45 and 60 ° C). Six insects were placed in four replicates for each treatment, the deaths caused in the treatments were recorded and compared. In the vegetative phenological state, dried in the sun, the best efficiencies of P. auritum powder were obtained when the material was dried at 45 and 60 ° C, with 38 and 45 % mortality respectively, while in the shade, the dried material at 35 ° C he achieved 100 % mortality, this being the best treatment of all. The leaves of this plant (dried in the shade and milled) can be used for the control of S. oryzae in stored grains.

Keywords

• holy grass
• control
• stored grains
• warehouse pests
• vegetable powder