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Articles by Umar Sanda Issa
Total Records ( 2 ) for Umar Sanda Issa
  Bismark Abugri , Hugues Baimey , Yaw Danso , Kingsley Osei , Joseph Adomako , Umar Sanda Issa , Ernest Baafi , Bismark Abugri and Hugues Baimey
  Background and Objective: Cylas species infestation is a serious pest threat to sustainable sweetpotato production in Ghana. For integrated Cylas species management, exploiting the potential of entomopathogenic nematodes, noting and appreciating sweetpotato farmers’ production practices is essential. Sweetpotato production practices and Cylas spp. management options in some major growing areas of southern Ghana were assessed. Materials and Methods: Farmer-level structured questionnaire was designed, pretested and used to collect information from 270 respondents employing both qualitative and quantitative techniques. Results: Seventy-nine percent of the farmers cultivated local sweetpotato cultivars. Eighty-six percent practiced sole cropping while 47% managed their own planting material from the previous crop. Sixty-nine percent cited Cylas species as the most important sweetpotato pest. Ninety-seven percent responded positively to awareness of Cylas spp. infestations in sweetpotato production. Major Cylas species management options indicated by farmers were; insecticides application, early harvesting, earthing up, crop rotation and weed control in order of significance. Seventy percent (70%) did not manage Cylas species infestations in sweetpotato production. Conclusion: Cylas spp. management with synthetic farm insecticides must be discouraged on grounds of human and environmental health concerns. Biological control, which involves incorporating entomopathogenic nematodes should be encouraged in an integrated pest management system for environmental friendliness.
  Umar Sanda Issa , Kofi Frimpong-Anin , Ibrahim Adama , Moses Brandford Mochiah , Haruna Braimah and Patrick Obeng
  Background and Objective: The Fall Armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) is a novel invasive pest in Africa but has established as a major pest of maize. Maize fields across six ecozones were surveyed for indigenous natural enemies of S. frugiperda in Ghana. Materials and Methods: Fifty maize plants showing signs of S. frugiperda infestation were sampled from three farms in each of the forty-eight districts blocked within all the six agro-ecological zones of Ghana. Collected S. frugiperda eggs and larvae were cultured in a laboratory for parasitoid emergence and percent parasitism determined. Results: Five species of egg and larval natural parasitoids comprising three Braconidae Coccygidium luteum Brullé, Chelonus sp. and Cotesia sp., one Ichneumonidae Campoletis sonorensis (Cameron) and one Tachinidae Exorista sp were identified. Among the predators recorded were coccinellids (Harmonia octomaculata [F.] and Coccinella transversalis [F.]) (Coleoptera: Coccinellidae), earwigs and spiders. C. luteum was the dominant natural parasitoid and also exhibited the highest field parasitism level, 6.38-10.71%. Parasitism levels of the other parasitoids ranged between 2.56-3.45%. The seemingly low field parasitism observed could be attributed to the high application of broad-spectrum insecticides which inadvertently is inimical to their development. Conclusion: Some indigenous parasitoids are adapting to S. frugiperda. Further exploration and protection of natural enemies through ecofriendly practices in a comprehensive IPM program is imperative for sustainable management of S. frugiperda.
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