Controlling the greater grain borer
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CTA. 1987. Controlling the greater grain borer. Spore 7. CTA, Wageningen, The Netherlands.
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Effective protection against the Greater Grain Borer can be obtained for about eight months by mixing shelled grain with permethrin dust before storing it in sacks. But storing maize on the cob and dusting it does not give protection. Unfortunately,...
Effective protection against the Greater Grain Borer can be obtained for about eight months by mixing shelled grain with permethrin dust before storing it in sacks. But storing maize on the cob and dusting it does not give protection. Unfortunately, this is precisely how most small farmers prefer to store maize, which suits the Greater Grain Borer best of all. This is one of the reasons why the pest has spread so rapidly through East Africa in recent years. The Tropical Development and Research Institute has been examining ways of combating the pest. Trials are being conducted to see if protection can be provided by leaving the sheath on the cob and dusting it with permethrin The greater grain borer is also a pest on cassava, especially when this is dried and stored. Once the pest has burrowed inside, it can remain for some time, eating out the centre. Dusting the outside is of little use once the beetle is inside. Experiments are now being conducted in which dried cassava is dipped into aqueous solutions of permethrin, and is then dried again before storing. For further information consult Tropical Pest Management April /June 1985 Taylor & Francis Ltd 4 John Street London WC1 N 2ET United Kingdom
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