ECO-FRIENDLY MANAGEMENT OF BRINJAL SHOOT AND FRUIT BORER, Leucinodes orbonalis GUENEE THROUGH ORGANIC MANURES AND BIO-PESTICIDES
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Date
2013-12
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Abstract
Investigations were carried out on eco-friendly management of brinjal
shoot and fruit borer, Leucinodes orbonalis Guenee through organic manures
and bio-pesticides at Instructional Farm, College of Agriculture, Junagadh
Agricultural University, Junagadh during Rabi 2011 and 2012. During the
study, brinjal shoot and fruit borer, Leucinodes orbonalis Guenee was the
major pest found infesting this crop in Junagadh area of Gujarat State.
Studies on eco-friendly management of brinjal shoot and fruit borer, L.
orbonalis through organic manures revealed that maximum (75%) requirement
of the nitrogen by the crop provided through the neem cake combined with the
inorganic fertilizers recorded the shoot infestation, fruit infestation on number
and weight basis. While, FYM recorded the maximum population of natural
enemies. Also, maximum yield of healthy brinjal fruits was recorded in the
treatment where 75 per cent of the recommended dose of nitrogen was
provided through neem cake.
Considering the effect of organic manures on morphological characters
of brinjal, the treatment where 50 per cent of the required nitrogen was
provided through poultry manure and remaining through in inorganic form
recorded the maximum plant height, number of leaves per plant, number of
flowers per plant and number of fruits per plant. The studies on relationship
between pest infestation and morphological characters of brinjal revealed that
plant height, number of leaves per plant, number of flowers per plant and
ABSTRACT
Abstract
number of fruits per plant exhibited the negative correlation with the shoot
infestation, fruit infestation on number and weight basis. While, all the
morphological characters showed positive correlation with shoot infestation,
fruit infestation on number and weight basis.
Study on bio-efficacy of bio-pesticides against brinjal shoot and fruit
borer, L. orbonalis revealed that profenophos (40%) + cypermethrin (4%) 0.04
per cent, NSKE 5 per cent and neemazal 0.005 per cent were found most
effective against the pest with minimum shoot and fruit infestation. The
treatment of spinosad 0.01 per cent, emamectin benzoate 5 per cent and cartap
hydrochloride 0.1 per cent were the next effective treatments against this pest.
Significantly maximum yield of healthy brinjal fruits (29051 kg/ha) was
recorded in the treatment of profenophos (40%) + cypermethrin (4%) 0.04 per cent,
neemazal 0.005 per cent (28002 kg/ha) and NSKE 5 per cent (27261 kg/ha). The
treatments with spinosad 0.01 per cent (26520 kg/ha), emamectin benzoate 5 per
cent (25779 kg/ha) and cartap hydrochloride 0.1 per cent (25039 kg/ha) were
included in the next group of effective treatments.
The economics of two spray applications of profenophos (40%) +
cypermethrin (4%) 0.04 per cent gave the highest net return followed by neemazal
0.005 per cent. Rest of the treatments viz, NSKE 5 per cent, spinosad 0.01 per
cent, emamectin benzoate 5 per cent and cartap hydrochloride 0.1 per cent
were the next economic treatments against this pest. Considering the cost
benefit ratio of these treatment, neemazal 0.005 per cent and profenophos
(40%) + cypermethrin (4%) 0.04 per cent gave the maximum cost benefit ratio.
Thus, looking to the effectiveness and economics of different organic
manures and bio-pesticides applied against major insect pests of brinjal, it can
be concluded that maximum nitrogen requirement of the crop provided through
the organic manures followed by two sprays of profenophos (40%) +
cypermethrin (4%) 0.04 per cent, neemazal 0.005 per cent or NSKE 5 per cent
were economic for the control of brinjal shoot and fruit borer, L. orbonalis
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ECO-FRIENDLY MANAGEMENT OF BRINJAL