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Post-harvest evaluation of selected hybrids to maize weevil Sitophilus zeamais resistance

OAR@ICRISAT

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Relation http://oar.icrisat.org/10669/
https://doi.org/10.5897/JSPPR2017.0237
10.5897/JSPPR2017.0237
 
Title Post-harvest evaluation of selected hybrids to maize
weevil Sitophilus zeamais resistance
 
Creator Khakata, S
Nzuve, F M
Chemining’wa, G N
Mwimali, M
Karanja, J
Harvey, J
Mwololo, J K
 
Subject Post Harvest Management
Pest Management
Maize
 
Description Sitophilus zeamais has been identified as one of the most destructive pests of maize stored in tropical regions. While most maize hybrids are being developed, it is necessary to evaluate their resistance to this pest. This study determined the resistance of selected maize hybrids to infestation by S. zeamais. Twenty two hybrids with varying resistance to weevil infestation and two checks DUMA 41-suceptible and MTP0701-resistant were used in a randomized complete block design experiment. Assessment was done at 10, 60 and 120 days of maize storage. Data was collected on percent weevil damage, grain weight loss and number of live and dead weevils. Heritability and correlation of factors were also estimated. Analysis of variance showed significant differences (P ≤ 0.05) on weight loss. The selection of the resistant genotypes was based on percent weight loss after 60 days. KH631Q and PH4 were selected as the most resistant and moderately resistant hybrids, respectively. The resistant check MTPO701 was also found to maintain resistance to weevil attack. There was a strong positive correlation between weight loss, number of live weevils and percent damage. Moderate heritability estimates of hybrids at 60 days of storage indicated the possibility of their parents to transfer the desirable traits to subsequent generations. Therefore, parents of the resistant hybrids could be utilized in breeding programs for maize weevil resistance and be deployed to farmers for use, respectively.
 
Publisher Academic Journals
 
Date 2018-05
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/10669/1/Post-harvest%20evaluation%20of%20selected%20hybrids%20to%20maize.pdf
Khakata, S and Nzuve, F M and Chemining’wa, G N and Mwimali, M and Karanja, J and Harvey, J and Mwololo, J K (2018) Post-harvest evaluation of selected hybrids to maize weevil Sitophilus zeamais resistance. Journal of Stored Products and Postharvest Research, 9 (3). pp. 16-26. ISSN 2141-6567