Indian Journal of Science and Technology
Year: 2021, Volume: 14, Issue: 10, Pages: 850-857
T Sheeba1*, M Ramani Bai2
1Department of Zoology, Scott Christian College, Manonmanium Sundaranar University, Thirunelveli, Tamil Nadu, India
2Department of Zoology, Muslim Arts College, Thiruvithamcode, Tamil Nadu, India Abstract
Email: [email protected]
Received Date:20 December 2020, Accepted Date:09 March 2021, Published Date:31 March 2021
Objective: This study is designed to understand the feeding preference of R. dominica, when three grains and their flours are provided in a choice- paradigm, constructed in the form of a poly vinyl chloride tunnel, in which feed materials are made available at random. Methods and Analysis: A total of 200 beetles were released into the choice-paradigm, and the number of beetles in each feed was counted once in every 24 h. When the beetles in the choice chamber were enumerated after 96 h, 26 percent of the released beetles were found in wheat grain; 25% in wheat flour; 12 in rice; 11 in chick pea; 10 in rice and chick pea flours and 6% in the outer tunnel without opting for any feed. On the basis of the feed on which R. dominica were reared, changes were observed in selected key biological characteristics. Findings: The research findings showed that wheat and wheat flour were preferred against rice, chick-pea and their flours. The incubation period increased significantly (51%) when reared in chick pea flour. In beetles reared on this feed, total larval period increased by 39%, pupal period by 31% and total developmental period by 39%. The fecundity decreased by 11%, whereas, male and female longevities respectively by 20% and 24%. Egg hatching was not much affected by the type of feed. Hatchability was 92% for wheat flour and 97% for rice and chick pea grains. Novelty: R. dominica, a primary pest of stored wheat, seemed to possess the evolutionary plasticity to survive in a variety of feed materials when the primary diet is not available.
Keywords: Rhyzopertha dominica; Triticum aestivum; Oryza sativa; Cicer arietinum; feeding preference
© 2021 Sheeba & Ramani Bai.This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)
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