Incidence of Earias vittella (Fabricius) and its management in Okra, Abelmoschus esculentus (L.) Moench
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Date
2004
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MPUAT, Udaipur
Abstract
Investigation carried out on “Incidence of Earias vittella (Fab.) and its
management in okra, Abelmoschus esculentus (L.) Moench” during kharif 2003
revealed that the incidence of fruit borer, E. vittella commenced in the 4th week of
August (Four weeks after sowing), by laying eggs on growing shoots. Damage to the
growing shoots and to the fruits started in the last week of August and 1st week of
September respectively. The peak number of eggs (5 egg/5plants), larvae (10.33
larvae/5 plant) and damaged fruits (71.80% on number and 70.24% on weight basis)
were observed in the second week of September, first week of October and the last
week of September, respectively.
The results of the investigation on the evaluation of IPM modules indicated
that the module consisting of two sprays of β-cyflurthrin @ 750 ml/ha, first spray at
flowering and second, 15 days after the first spray was superior providing maximum
control of the fruit borer with minimum fruit damage of 18.44 and 16.95 per cent on
number and weight basis, respectively. It gave maximum net profit of Rs.
16124.40/ha with cost benefit ratio of 1: 10.54. It was at par with two sprays of
acephate @ 750 gm/ha, first spray at flowering and second, 15 days after the first
spray, and spray combination of β-cyfluthrin (750 ml/ha) at flowering and Neem Raj
@ 2.5 lit/ha, 15 days after the first spray with net profit of Rs. 13132.00 and
12121.80/ha and cost-benefit ratio of 1:12.16 and 1:6.91, respectively.
The results of the computation of marketable yield and avoidable losses
revealed that the module consisting of two sprays of β-cyfluthrin @ 750 ml/ha, first
spray at flowering and second 15 days after the first spray was superior giving highest
marketable yield of 3595.70 kg/ha, with highest avoidable loss of 61.37 per cent in
Description
Incidence of Earias vittella (Fabricius) and its management in Okra, Abelmoschus esculentus (L.) Moench
Keywords
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Citation
Dangi and Ameta, 2004