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There
is now growing awareness about the hazards of chemical pesticides and
the search of eco-friendly options for pest management is in motion. Experiments
were conducted in the farmers' field of Myagdi and Dadeldhura to assess
the efficacy of nettle extracts in controlling powdery mildew of pea during
2001/2002. The nettle treatments were applied as foliar spray on pea crop
grown for seed production purpose under farmers' management conditions.
In both the locations, the plot sprayed with 20% fresh nettle extract
had least disease development followed by the plot sprayed with 20% fermented
nettle extract. Seed yield of pea was highest in plot sprayed with 20%
fermented nettle extract in both the locations. The result indicated that
both fresh and fermented extracts of nettle at higher concentration (20%
solution) could be applied for the management of powdery mildew of pea.
However, considering cost and return associated with nettle extract sprays,
nettle extract sprays in the seed crop of pea can not be economically
justified unless the opportunity cost of farm labour per person-day is
lower than the value of 1.5 kg of pea seed. |
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