PJB-2017-644
QUANTIFYING LOSSES AND PHYSICAL DAMAGE IN STORED WHEAT GRAINS DUE TO KHAPRA BEETLE (Trogoderma granarium) EVERT INFESTATION
SHEHZAD SALEEM
Abstract
Trogoderma granarium is one of the notorious beetles causing tremendous qualitative and quantitative losses to stored grains supplies. The present study was conducted to quantify the losses of stored wheat grains in three wheat varieties Faisalabad-2008, Sehar-2006 and Shafaq-2006 caused by khapra beetle in Multan, Southern Punjab Pakistan. The study was conducted using three infestation levels (20, 30, 40 larvae) with different exposure times and four treatments (0, 20 , 30, and 40 units of T. granarium each with three replicates. The quantitative variables under study were 1000-grain weight, weight loss (%), progeny development, frass production, insect-broken grains, insect-damaged grains, and healthy grains. Statistical analysis showed that all variables were significantly affected by different levels of infestation, varieties and exposure time. There was a gradual increase in lost-grain weight and increases in weight loss (%), frass production and damaged grains with higher infestation levels and reater exposure time. Khapra beetles induced large quantitative losses to this cereal grain thus a control strategy is needed to minimize these losses.
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