Toxicity and protectant potential of linalools (Monoterpenoid) against Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) infestation in stored maize

The increasing resistance of pests to conventional pesticides, coupled with their high cost and associated health risks, has led to a growing demand for natural alternatives. This study investigated the efficacy of linalool, a natural monoterpene, in managing the maize weevil, Sitophilus zeamais, on stored maize grains. The effects of linalool on adult mortality, F1 progeny, weight loss, and damage to maize grain were assessed under ambient laboratory conditions for three different dosages (50, 100, and 150 µL), compared to the established pesticide, Betallic, at a dose of 30 µL, and a control of untreated grain. Linalool significantly reduced the number of F1 progeny and caused 47% mortality in adults at the highest dose of 150 µL, demonstrating its potential as a natural alternative to conventional pesticides. Although the protection provided by linalool at 150 µL was not comparable to that of Betallic, these results indicate the potential of linalool as an eco-friendly alternative for pest management, contributing to a more sustainable future for agriculture.   Key words: Pest control, monoterpenoid, linalool, pesticides, maize weevil, Ghana.