The effect of insecticidal plant materials on the quality of stored beans
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Date
2021
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Publisher
Sokoine university of agriculture
Abstract
The research was conducted at the Department of Engineering Sciences and Technology
of Sokoine University of Agriculture (SUA) to study the effect of insecticidal plant
materials (neem and eucalyptus leave powder) on mortality of bruchid bettles and quality
of stored beans for three months storage period. The objectives of the study were; To
determine the effect of different concentrations of insecticidal plant materials on insect
pests mortality in stored beans, to determine the effect of different concentrations of
insecticidal plant materials on organoleptic qualities of stored beans and to determine the
effect of different concentrations of insecticidal plant materials on seed viability of stored
beans at different storage duration. Three rates (10, 20 and 30 g/kg) of each insecticidal
plant leave powder, a synthetic insecticide (Shumba supermax dust at 0.5g/kg) and an
untreated grain were used as treatments. The experiment was arranged in completely
randomised design in four replications. Data collected include; Insect mortality, odour,
taste and seed viability index of stored bean grains. Data collected were subjected to
analysis of variance (ANOVA) using General Linear Model in SPSS computer software
packages (version 16) and mean comparisons were conducted using Turkey’s (HSD) test
at 5% level of significance. Results showed a significant difference in percent mortality of
adult bruchids due to the effect of insecticidal plant powders. The increase of adult
bruchids mortality was directly proportional with the plant powder concentration. The
application of insectical plant materials had influence on organoleptic quality of stored
beans. However, the insecticidal plant powder had no significant effect on seed viability
when compared to the controls. It can therefore concluded that, the insecticidal plant
material can be used to protect grains against bruchid damage and on stored seeds for
planting. For home consumption, the treated grain should be washed thoroughly with
water to remove remained residue before use.
Description
Keywords
Effect of insecticidal plant, Stored beans, Seed viability, Storage duration, Neem and eucalyptus leave powder