Botanical Bruchids Malathion Resistant Varieties and Z. Subfasciatus
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Date
2017-06
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Addis Ababa University
Abstract
Protections of stored products from insect pests using resistant varieties and botanicals have
been utilized for centuries. Studies were conducted to evaluate different botanicals and local
common bean varieties against Mexican bean weevil, Zabrotes subfasciatus (Boheman) at
Melkassa Agriculture Research Center in 2016/2017. Twenty local common bean varieties
were evaluated twice against Z. subfasciatus in completely randomized design in three
replications. The result indicated that, RAZ White and Round yellow were resistant in the
first and second round experiments. The botanical experiment consists of Jatroph seed
powders, Parthenium seed powders and Neem leaves powders at the rate of 0.2g/kg of seed
for each experiment were evaluated against Z. subfasciatus. Malathion 0.2g/kg of seed was
used as a standard check. Jatroph seed powder was the most effective against Z. subfasciatus.
Parthenium seed powders and neem leaves powders also showed promising result.
Germination test was conducted on bean seed treated with different botanicals. Common
bean treated with botanicals significantly (p˂0.05) had higher germination percentage than
that of the untreated seed. In general, the results obtained indicated that using bean Varieties
(RAZ white and Round yellow) resistant varieties and botanicals (Jatropha) seed powder
gave the best control of Z. subfasciatus.
KEYWORDS: Botanical, Bruchids, Malathion, Resistant varieties and Z. subfasciatus
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Botanical, Bruchids Malathion, Resistant Varieties, And Z. Subfasciatus