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Efficacy of spray at 50% Flowering stage with certain Indigenous leaf extracts and newer Insecticides against Maruca vitrata in Greengram

Author Affiliations

  • 1Agricultural Research Station, Madhira, Khammam District, AP-507 203, INDIA

Int. Res. J. Biological Sci., Volume 3, Issue (3), Pages 1-9, March,10 (2014)

Abstract

Metaflumizone 22% SC 0.044 per cent spray at 50% flowering stage of greengram was the most effective and significantly superior over the other treatments by recording the lowest (1.98) no. of larvae with highest (72.27) per cent reduction in population and lowest (7.53%) pod damage with highest (87.76) per cent reduction over untreated control. The next better treatment was chlorfenapyr 10% SC 0.015 per cent spray with mean number of larvae 3.35 and 63.17 per cent reduction in population, 16.83% pod damage and 72.62 per cent reduction over untreated control. The Neem Leaf Extract and Karanj Leaf Extract sprayed at 50% flowering stage, recorded 19.58 % and 26.05% pod damage with 68.05 and 55.74 per cent reduction in pod damage over untreated control. The sprays at 50% flowering stage recorded 0.69 (KLE – 573 kg/ha) – 1.35 (metaflumizone - 1126 kg/ha) kg plot yields with an increase of 59 – 189 per cent yield increase and 1.12 – 2.04 CBR over untreated control. The standard control (Chlorpyriphos 20 % EC 0.05%) 2.5 ml + DDVP 76% EC 0.076% @1 ml/l) sprayed at 50% flowering stage, recorded 18.28% pod damage with 70.11 per cent reduction in pod damage and recorded 0.85 kg/plot (707 kg/ha) yield with an increase of 92 per cent yield with 1.27 CBR over untreated control.

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