Callosobruchus maculatus | ||
| Kufa Journal for Agricultural Science | ||
| Article 1, Volume 4, Issue 2, December 2012, Pages 86-92 | ||
| Abstract | ||
| Abstract The aim of current study was to evaluate the efficiency of the insecticide Power 50, and to test the activating the insecticide by castor oil at rate (1:1) (Insecticide : oil), to protect stored cowpea grains prepared to cultured against southern cowpea weevil Callosobruchus maculatus (F.). The result of the study showed that Power 50 at the concentrations (7.5, 15, 30) gm/100 L water had a positive effect in seed protection as number of emerged adults reached to (0) adult; decrease in First generation reached to 100% compared with (60.33) adults in control; and loss in weight rate of cowpea seeds reached to (0)% when treated by the concentration 30 gm/100 L water compared with (27.33)% in control. It was noticed, too, that the planting percentage for cowpea seeds wasn't affected by any concentration of insecticide as it reached to (96.66, 93.33, 90, 90)% at the concentrations (3.75, 7.5, 15, 30) gm/100 L water, compared with 96.66% in control. The laboratory experiments of insecticides and castor oil mixtures (1:1), showed that the oil activated the small concentration of the insecticide, so the number of laid eggs reached to (0) egg at concentrations (3.75, 7.5, 15) gm/100 L water, so we get a full protection for the seeds against the insect. Besides, there wasn't any loss in the weight of seeds at the above mentioned concentrations, compared with (19.60) % of loss in control. Also, the planting percentage of seeds wasn't affected by treated with mixture of insecticide and the oil as it reached to (96.66, 93.33, 93.33, 93.33) % at the concentrations (1.85, 3.75, 7.5, 15) gm/L water, compared with (96.66) % in control. | ||
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