Response of the larger grain borer [prostephanus truncates (horn)] to varietal variations in resistance of maize

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dc.contributor.authorKamwela, Daniel Shabani
dc.date.accessioned2026-03-11T11:44:43Z
dc.date.available2026-03-11T11:44:43Z
dc.date.issued2001
dc.descriptionMasters of Science in Agriculture
dc.description.abstractThis study was carried out to investigate the response of the larger grain borer Prostephanus truncatus (Hom) to variations in resistance of maize varieties. Thirty-one (16 local, 8 composites and 7 hybrids) maize varieties were used as treatments. The response of P. truncatus was investigated by determining the following parameters: number of adult progeny, oviposition. larval and pupal duration and adult emergence pattern. For each of the maize cultvars, grain damage, weight loss and susceptibility indices were calculated. Prostephanus truncatus was found to respond differently to the maize varieties. Significant variations in numbers of adult progeny, number of eggs, larval and pupal mortality were observed among maize varieties. The highest susceptibility index was recorded in a hybrid variety H6302. Percentage dry-weight loss and percentage damage showed significant variations among maize varieties. Varieties H6302, H 614, MH51, TMV2 and Katisini were the most damaged by the pest. The shortest and longest larval duration were recorded in varieties H6302 and UCA, respectively. Adult emergence was highest in the hybrid varieties. Both larval and pupal mortality were found to vary significantly (P < 0.05) among maize varieties. The lowest percentage larval and pupal mortality was recorded in H6302 while the highest percentage pupal and larvae mortality was recorded in Kilima. It is concluded that varietal resistance can contribute to the reduction of damage and weight losses of stored maize by P. truncatus. Identification and incorporation of the genes or factors responsible for inherent resistance to storage pests can greatly contribute to the effectiveness of integrated pest management (IPM) strategy for this pest.
dc.description.sponsorshipThe National Extension Project Phase II (NAEP II) of the Ministry of Agriculture and Cooperative (MAC).
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/20.500.14820/7377
dc.language.isoen
dc.publisherSokoine University of Agriculture
dc.subjectProstephanus truncatus
dc.subjectLarger grain borer
dc.subjectMaize
dc.subjectMaize varieties
dc.titleResponse of the larger grain borer [prostephanus truncates (horn)] to varietal variations in resistance of maize
dc.typeThesis

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