The bean aphid control with systemic pesticides

The bean aphid control with systemic pesticides

1959

REP.MB-1223

Three systemic insecticides, viz., demeton, Metasystox and dimefox were tested in controlling bean aphid (Aphis craccivora) on Gliricdia maculata. The pest thrives on Dolichos lablab, Vigna unguiculata, Arachis hypogeane, V. radiata, V. mungo, Medicago sativa, Indigofera sp. and some other leguminous crops. The direct application of demeton and Metasystox at 0.05% on the plants was quite effective in controlling the pest, causing 98 to 99% reduction in the population within 48 h. The drench treatments of both insecticides gave the same results during a week. A marked reduction in population was observed in dimefox treatment, which was placed in the soil at a depth of 15 cm. The reduction reached the 100% level during 2 weeks. [THH]

v.46(11):421-425, MADRAS AGRICULTURAL JOURNAL

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