STUDIES ON THE EFFECT OF PEST MANAGEMENT MODULES AGAINST INSECT PEST COMPLEX AND SEED YIELD OF OKRA, Abelmoschus esculentus (L.) Moench
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Date
2020-08
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation titled “Studies on the effect of pest management modules against insect
pest complex and seed yield of okra, Abelmoschus esculentus (L.) Moench” was carried out at the
Experimental Research Farm of Dr. Yaswant Singh Parmar University of Horticulture and Forestry, Nauni,
Solan (HP) during 2019-2020. The experiment was laid out in Randomized Block Design with four replications.
The okra cv. P-8 was sown in June, 2019 in a plot size of 6 m2 under seven treatment modules with T1
(Installation of yellow sticky traps and pheromone traps, spraying of Azadirachtin @ 5 ml/l at 45 DAS,
flonicamid 50 WG @ 0.4 g/l at 10 DAFS, thiacloprid 21.7 SC @ 0.6 ml/l at 10 DASS, rynaxypyr @ 0.3 ml/l at
10 DATS, spiromesifen @ 1 ml/l at 10 DAFoS), T2 (Spraying of neem soap @ 10 g/l at 45 DAS, pongamia soap
@ 10 g/l at 10 DAFS, NSKE @ 40 g/l at 10 DASS, Lecanicillium lecanii @ 5 g/l at 10 DATS, Beauveria
bassiana @ 5 g/l at 10 DAFS), T3 (Spraying of flonicamid 50 WG @ 0.4 g/l at 45 DAS, difenthiuron @ 1 g/l at
10 DAFS, spiromesifen 22.9 SC @ 1.25 ml/l at 10 DASS, thiacloprid 21.7 SC @ 0.6 ml/l at 10 DATS), T4
(Neem cake @ 2.5 t/ha at field preparation, installation of yellow sticky traps, spraying of NSKE @ 5% at 45
DAS, neem oil 3 ml/l at 10 DAFS, Beauveria bassiana @ 5 g/l at 10 DASS, Bacillus thuringiensis @ 2.5 g/l at
10 DATS), T5 (Beejamrit seed treatment, soil application of jeevamrit at 45 DAS, foliar spray of jeevamrit at 45
DAS and 3 sprays at 10 days interval, foliar spray of neemastra at 55 DAS and 3 sprays at 10 days interval), T6
(Spraying of Malathion @ 1 ml/l water at 45 DAS, fenazaquin @ 2.5 ml/l at 10 DAFS, deltamethrin in 1 ml/l at
10 DASS, oxy-demeton methyl @ 2 ml/ l at 10 DATS) and T7 (Control with no spray). The results revealed that
T1 had maximum reduction of insects and less infestation in plants. T1 obtained higher values for growth
parameters (plant height – 183.36 cm, pod length – 15.53 cm) and yield parameters (number of pods per plant –
13.10, number of damaged pods per plant – 1.61, number of seeds per pod – 51.04, seed yield – 16.66 q/ha) and
quality parameters (100 seed weight – 6.21 g, germination percentage – 81.75%, seedling length – 22.48 cm,
seedling dry weight – 27.64 mg, electrical conductivity – 0.872 dS/m, SVI-I – 1837.35, SVI-II – 2259.68,
germination percentage in accelerated ageing test – 69.00%, and cold test – 73.00%) and the highest benefit cost
ratio of 3.34:1 followed by T3. Hence T1 provided maximum protection from insects and also performed better
growth, yield and quality parameters of seed with maximum benefit cost ratio and after multilocation trails these
can be applied for commercial cultivation of okra seed production in the midhills of Himachal Pradesh.