A field experiment on the effects of some insecticides on the pests of garden egg (Solanum integrifolium) at Legon.

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The effects of four insecticides, cypermethrin, diaxocarb, dimethoate and carbofuran on the insect fauna of a new garden egg variety, var 133, was investigated at the Agricultural Experiment Farm of the University of Ghana, Legon. Cypermethrin, diaxocarb and dimethoate were applied in four sprayings at 10-14 day intervals from two weeks after transplanting. Carbofuran granules were applied in ring treatments at transplanting and at flowering, 45 days after transplanting. Results obtained showed significant differences in the insect population and percent leaf infestation of Urentius hystericellus (RIGHTER) (Hemiptera : Tingidae). Fruit weight per plant and number of fruits per plant were also significantly different among treatments. No significant differences were observed, however, in the date of flowiering, plant height at eight weeks after transplanting, percent flower infestation nor in the percent fruit infestation. Cypermethrin and dimethoate brought about higher yields than the diaxocarb and carbofuran treatments.
日本応用動物昆虫学会の論文