The study results conclude that to safely store valuable grain commodities, the usage of jute and woven plastic bags without internal plastic liners is not recommended. The absence of internal liners in these bags not only allow insects to enter and infest the grains but also insects inside bags escape from bags to cross-infest surrounding bags. Fumigation of both jute and woven plastic bags for the resident insect population can result in control failure due to their very nature of escaping behavior during the fumigation period. Results also showed the importance of bag stacking in wheat warehouses. It showed row stacking of bags which on one hand is recommended for relaxed handling of bag stacks during the storage period but because of vacant spaces between bags stacks fumigant gas freely circulates throughout the interior of the building and can more easily diffuse in bags which can help to kill the relatively resistant insects like T. granarium compared with somewhat susceptible species like T. castaneum because in current results row stacking had significant effect on fumigation induced mortality of T. granarium particularly in combination with woven plastic bags.
Evaluating the pest control efficiency of wheat storage bags and polypropylene liners against Trogoderma granarium and Tribolium castaneum
Stored grain losses are largely due to insect penetration in conventional bags and limitations of hermetic storage systems.
This study evaluates polypropylene liners in storage bags to enhance protection against infestation while maintaining effective fumigation.