Evaluation of maize genotypes for resistance to Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) infestation

IF 1.6 Q2 AGRICULTURE, MULTIDISCIPLINARY

Asian Journal of Agriculture and Biology Pub Date : 2021-07-07 DOI:10.35495/ajab.2020.10.549

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引用次数: 2

Abstract

The use of Sitophilus zeamais resistant maize germplasm for breeding new varieties can contribute to reduce hazardous insecticide use on stored maize. This study evaluated six maize genotypes, five genebank accessions (GH2354, GH3239, GH3324, GH3609, GH6182) and one commercial variety (OBATANPA) for resistance to S. zeamais infestation . Maize grains were infested with adult weevils and data on number of grains with weevil damage, percentage weight loss, median developmental time and index of susceptibility was collected. Differences in the number of days to first adult emergence between genotypes were not significant ( P > 0.05 ). Differences between genotypes for all other parameters evaluated were however significant ( P < 0.05 ). Accession GH3609 recorded the most damaged grains (23.32%) and the highest (15.41%) grain weight loss, whereas OBATANPA recorded the lowest (9.81%) damaged grains whilst the lowest weight loss (8.26%) was observed in GH6182. The proportion of damaged grains correlated with weight loss (r = 0.96) and index of susceptibility (r = 0.82). All evaluated genotypes were susceptible to S. zeamais attack. Little research has been conducted to identify S. zeamais resistant maize germplasm in Ghana. The results of this study should serve as baseline information in the screening for resistance to S. zeamais .

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来源期刊

Asian Journal of Agriculture and Biology AGRICULTURE, MULTIDISCIPLINARY-

CiteScore

2.80

自引率

4.50%

发文量

审稿时长

6 weeks

期刊介绍： Asian Journal of Agriculture and Biology (AJAB) is a peer reviewed, open access, quarterly journal serving as a means for scientific information exchange in international and national fora. The scope encompasses all disciplines of agriculture and biology including animal, plant and environmental sciences. All manuscripts are evaluated for their scientific content and significance by the Editor-in-Chief &/or Managing Editor and at least two independent reviewers. All submitted manuscripts should contain unpublished original research which should not be under consideration for publication elsewhere. In order to avoid unnecessary delay in publication, authors are requested to comply the following guidelines; differing these, your submission will be returned for additional revision.