Data set on Insecticidal Activity of Lantana Camara Extract oil on Controlling Maize grain weevils

2019-11-29T06:41:59Z (GMT) by Adane Adugna Ayalew
Currently farmers are faced by serious post-harvest problems from weevils especially in storage of grains. When grain is attacked by weevils, they become less marketable and this causes economic loss to the producers and quality loss to the consumers. As a result of these problems, many farmers prefer to sell most of their crop immediately after harvesting to avoid making losses from the infestation of the weevils. Maize has ability to be stored for long period for latter consumption or to look for good price. However, it suffer major economic loss caused by grain infesting insects because of cumulative effects of feeding, breeding, transmission of toxic and saprophytic fungi and associated changes in the micro-ecological conditions in the grain bulk, which hasten the deterioration process in the grain. Various control methods are available for use in storage systems in numerous and diverse with their environmental factors for the post-harvest system. Insect pests have been prevented principally by synthetic insecticides chemicals such as DDT, Malataine and others. However, this continued and wide spread use of synthetic insecticides chemicals has given rise to the development of resistance, pest resurgence, lethal effects on non-target organisms, toxic residues, worker safety. The chemicals contaminate stored food commodity, leaving behind harmful residue in health, causes cancer. The use of botanical extract crude oil and powder is suitable for grain protection from infested insects. It would be increase demand and experience in the use of these eco-friendly natural products, which could replace synthetic chemicals for management stored grain protection from weevils including the development of non-chemical technologies which may eliminate the use of insecticides and have economic and health benefits for applicators, consumers and the environment. The operational parameters for repellency and mortality of weevils are effect of extract oil concentration (0% (w/w), 2% (w/w), 3% (w/w), 5% (w/w), 7% (w/w), and 10% (w/w), exposed time (1-5 days), and type of extract solvents (methanol, ethanol and ethyl acetate) were investigated. Repellency effect was also conducted at 6, 12 and 24 h at different concentration oil. Gas Chromatography-Mass spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FT-IR) was used to identify the chemical composition and Functional group of solvent extracted oil respectively. The number of weevil’s death increases significantly as exposed time increases. The extracted oil by the three-solvent fraction had direct repellent and toxic effect to the weevil. From all treatment applied, extracted by methanol fraction had showed highest percentage mortality (74%). The lowest mortality rate was observed in ethyl acetate fraction oil (26%), at 2% (w/w) concentration. The effect of lantana Camara leaf powder and extracted oil on repellency and mortality was showed directly proportional to concentration dosage.




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