Influence of Processing Stages in Cultivated Rice Varieties on the Feeding Preference of the Lesser Grain Borer, Rhyzopertha dominica F. (Coleoptera: Bostrichidae)

Bilal Atta, Arshed Makhdoom Sabir, Tahir Bilal, Muhammad Dildar Gogi, Muhammad Asif Farooq, Muhammad Ahsin Ayub, Tahir Hussain Awan, Amara Nasiba, Syed Sultan Ali, Muhammad Usman Saleem


Rhyzopertha dominica (Coleoptera: Bostrichidae), a prevalent post-harvest pest in rice storage, significantly impacts global financial losses, necessitating a comprehensive understanding of its feeding habitats and processing phases. This study aimed to compare feeding preferences of R. dominica among four rice cultivars (Basmati 515, Super Basmati, Super Gold, and Super Basmati 2019) and three processing stages (paddy, brown rice, and polished rice). Rhyzopertha dominica exhibits distinct feeding preferences for rice cultivars and processing stages, with paddy of Super Basmati 2019 having the highest mortality rate (50.89%) and Basmati 515 polished rice having the highest survival rate (84.89%). The maximum growth rate (67.00 nos.), grain damage (80.67%), and grain weight loss (1.5806%) were seen on polished rice of Basmati 515. The study reveals that the processing stages of rice cultivars significantly influence R. dominica infestation and feeding preferences, with polished rice being the preferred stage. The study emphasizes the need for site-specific integrated pest management strategies to control R. dominica infestation in rice, highlighting the need for further research on its feeding preferences. To mitigate insect losses, improved management strategies should be implemented, including improved storage conditions, post-harvest handling practices, and a combination of physical and chemical control techniques.


Rhyzopertha dominica; Rice cultivars; Processing stages; Feeding preference; Post-harvest losses; Integrated pest management

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