MANAGEMENT OF LESSER GRAIN BORER IN WHEAT GRAINS BY USING COMMERCIALLY AVAILABLE MICROBIAL PESTICIDE
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Keywords:
Lesser Grain Borer, Tracer, Weight Loss, Mortality, ManagementAbstract
Wheat is the third largest food crop of the world, and Pakistan is the eighth largest wheat
producing country globally. The lesser grain borer is a primary pest of stored grains in many regions of
the world. It is injurious to cereals; breeds in corn, rice, wheat, and in other substrates containing starch.
The highest reduction in fecundity of this pest was observed when grains were treated with concentrations
of 0.5 ml and 0.75 ml resulting 5.22 and 5.26 eggs per grain, respectively. With the increasing
concentration of Tracer, the emergence rate of F1 adults decreased as compared to the control. The
maximum number (21.46 F1 adults) was recorded when we applied 0.25 ml of concentration in the wheat
grains. On the other hand, the least number of newly emerged adults (18.06) reported in the jar that was
treated with concentration of 0.75 ml. All the concentrations were statistically different from each other
and resulted in effective virulence against this insect except the control, where 84.65% weight loss was
reported. Among concentrations, the highest percent weight loss (21.47%) was caused by the
concentration (0.25 ml) whereas concentration of 0.75 ml was the most effective, with less than 10%
weight loss to wheat grains. The mortality of the insect was increased with the increase in concentration
of bio-pesticide. The highest mortality was observed in concentration of 0.75 ml with 4, 7 and 8.5 dead
adults, after 24, 48 and 72 hours, respectively.
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