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soil insecticides

International Journal of Tropical Insect Science (1)

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Field evaluation of foliar and soil insecticides for the control of Aphis gossypii Glover (Homoptera: Aphididae) on potatoes in Kenya
J. H. Nderitu, J. M. Mueke
Journal:

Insect Science and Its Application / Volume 7 / Issue 5 / October 1986

Published online by Cambridge University Press:

19 September 2011, pp. 667-675

Print publication:

October 1986
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Field evaluation showed oxydemeton methyl 25% E.C. at 0.6 kg a.i./ha and dimethoate 40% E.C. at 0.74 kg a.i./ha to be more effective than cypermethrin 40% E.C. at 0.25 kg a.i./ha, decamethrin 2.5% E.C. at 0.03 kg a.i./ha, endosulphan 35% E.C. at 0.8 kg a.i./ha and profenofos 50% E.C. at 0.74 a.i./ha in the control of apterae on potatoes. Disulfoton 10G at 1.6 k0g a.i./ha and carbofuran 10G at 5.2 kg a.i./ha were superior to oxamyl 10G at 5.2 kg a.i./ha and terbufos 5G at 2.6 kg a.i./ha applied in the furrow at planting for the control of aphids. Although these insecticides gave good control of apterae, the alate population in the treated plots varied from significant reduction to no reduction. All the insecticides tested did not significantly increase potato yield, although mean yields were increased.