Abstract
<b> </b>Plant powders prepared from five plant species were tested under constant conditions at 30 ± 2â and 60 - 65% r. h. for their ability to protect sorghum grains against <i>Sitophilus zeamais</i> in storage. Doses at 0.5, 1.0 and 2.0g and 0.12g of the check (permethrin (0.6%) were applied for assessments of adult mortality, emergence and damage. Leaf powders of <i>E. balsamifera, J. curcas and L. inermis</i> gave the highest adult mortality (60.0 - 100%), while peel powder of <i>C. sinensis</i> and leaf powder of <i>L. hastata</i> recorded 47.50 - 82.50% adult mortality. Least adult emergence (0.00%) was observed when 2.0g of <i>J. curcas </i>was applied, while the highest (57.82%) was obtained from 0.5g <i>L. hastata. </i>All the plant powders showed significant (p < 0.05) adult mortality against <i>S. zeamais </i>with weevil perforation index (WPI) of < 50.00<i>.</i> This study was designed to observe the possibility of using plants parts to reduce grain damage caused by insect pests during storage.
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