This work was carried out in collaboration between all authors. Author EIE designed the study, performed the statistical analysis, wrote the protocol and the draft of the manuscript. Authors IBO, NOA and CEA managed the collection of LYD samples from different locations.Author CIA managed collection of insects and identification. Author CEI managed weed species identification. Author EAOD performed study on associated LYD pathogens. Authors JOO and CDA managed the identification of coconut varieties. Author IJO helped in the location and identification of LYD coconut palms. All authors read and approved the final manuscript.
Insect pests can damage and affect the quality of the shea fruit in storage and this could threaten food security, self sufficiency and incomes. This paper describes approaches to assuring safety throughout the post-harvest storage value chain of the shea fruit. The study area, Niger State, Nigeria, was divided into zones (A-C) for effective coverage of storage warehouses. Selected warehouses were visited, observations conducted, shea fruits collected for laboratory analysis and the owners interviewed on processing and storage methods. The method used emphasized a participatory approach, facilitating greater local involvement in the collection of data that serves the purpose of gaining an insider's perspective. Direct observation of infrastructural facilities also assisted in validating information gained from respondents. Laboratory analysis were conducted on shea fruits for identification and quantification of storage insect pests from October 2014 to September 2015 at Nigerian Institute for Oil Palm Research (NIFOR), with temperatures fluctuating between 26°C-34°C and relative humidity from 52%-92%. As storage time increased, mites, chalcid ants, and weevils (Curculionidae) were observed. The shea fruits were observed to be mainly attacked by mites and beetles. October (25) and November (21) 2014 had the highest number of mites with fruits severely attacked, and with subsequent decrease observed. Shea fruits should be picked immediately as it matures, as fruits left in the fields for long periods become infested. During collection, it should be ensured that the fruits are not exposed to insect pests before they are properly bagged and removed. All infested shea fruits should be removed and separated immediately. Particular attention should be paid to cracks and gaps where insects may hide on the fruits. The fruits should be properly dried before storage to prevent germination and fungi attack. This study proffers improvement on indigenous storage systems to guarantee long term storage. Information provided will add value to improving insect pest management practices of the shea fruit, thereby leading to improved shea fruit quality.
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