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Investigación Agraria

On-line version ISSN 2305-0683


TRIANA ARCANO, José Alexander et al. Effectivity of ozone on Sitophilus oryzae (L.) (Coleoptera: Curculionidae) under laboratory condition. Investig. Agrar. [online]. 2020, vol.22, n.2, pp.70-74. ISSN 2305-0683.

The ozone has been used as a control strategy to fungi and insects which affect grains and stored foods, due to be highly reactive and its strong oxidizing activity. In this research the insecticide effect of ozone at concentration of 20 ppm, was evaluated on adults of rice weevil, Sitophilus oryzae (L.), applied during 15, 30, 45 and 60 minutes, in empty silos and silos with maize. The experiment design was completely randomized with factorial array. There were significant differences (P < 0.001) in the mortality percentage of rice weevilin empty silos (53.5%) and those with maize (16.88%). The exposure time also caused a significant effect on the mortality (P < 0.001), which increased as time did and reached the highest value at 60 minutes (58.25%). Similarly, the interaction silo condition by exposure time to ozone was significative (P < 0,001) and allowed to see differences in the mortality of S. oryzae, which percentages were higher in empty silos than in silos with maize. These results show that ozone had a moderate insecticide effect on S. oryzae.

Keywords : control; insecticide; silo; Sitophilus oryzae.

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