Efficacy of Post-emergence Herbicides on Growth and Yield of Mungbean [Vigna radiata (L). Wilczek]
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Date
2023-08-18
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Agriculture University, Jodhpur
Abstract
A field experiment entitled “Efficacy of post-emergence herbicides on
growth and yield of mungbean [Vigna radiata (L). Wilczek]” was conducted at
Instructional Farm, College of Agriculture. Jodhpur (Rajasthan) during kharif season
of 2022. Field experiment was laid out in randomized block design (RBD) with ten
treatment combinations and replicated thrice. The treatments taken in the
investigation were W1- Weedy check, W2- Weed free, W3- Imazethapyr 55g/ha, W4-
Fluazifop-p-butyl 250g/ha, W5- Pendimethalin + imazethapyr 800g/ha, W6-
Imazethapyr + imazamox 70g/ha, W7- Propaquizafop + imazethapyr 83.3g/ha, W8-
Aciflourfen sodium + clodinafop- propargyl 210g/ha, W9- Fomesafen + fluazifop-p butyl 220g/ha, W10-Quizalofop ethyl 60g/ha. Results indicated that post-emergence
application of fomesafen + fluazifop-p-butyl 220g/ha (W9) significantly reduced weed
density and dry weight of Digera arvensis L., Phyllanthus niruri L., Dactyloctenium
aegyptium L. results in achieving higher weed control efficiency at all growth stages
of crop that improved weed index and also lesser nutrient removals (N, P, K) recorded
at 30, 45 DAS and at harvest. Owing to reduction in weed infestation which improved
growth attributes viz. final plant population (311 „000 plants/ha) at harvest, plant
height (11.10, 36.21 and 58.3 cm), dry matter accumulation (2.75, 11.84 and 21.26
g/plant), number of trifoliate leaves (8.80, 14.36 and 12.06/plant) at 30, 45 DAS and
at harvest, respectively, while total number of branches (6.21 and 7.09/plant), root
length (12.58 and 13.49 cm) and root volume (7.08 and 10.08 cm3
) was significantly
recorded at 45 DAS and at harvest, respectively due to application of said treatment
(W9) during field experimentation.
Similarly, significantly higher number of pods/plant (35.79), number of
grains/pod (9.74) and 1000-grain weight (42.26 g) were recorded under post emergence application of fomesafen + fluazifop-p-butyl 220g/ha (W9) resulted in
production of higher grain yield (1253 kg/ha), stover yield (2093 kg/ha) and
biological yield (3346 kg/ha) and also showed their efficacy in recording higher
protein yield (309 kg/ha) and contents of N, P and K in grains and stover as well as
their uptakes by mungbean.
Improvement in grain yield that resulted in higher monetary advantages in
terms of gross return (₹ 109,728/ha), net return (82,148) and B C ratio (3.97) by
application of most effective treatment (W9) as compared to weedy check (W1).
However, among all the treatments weed free (W2) recorded significantly highest
growth and yield attributing characters and yield over rest of the treatments tested
during field trial
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Sofi, Mrhraj Ud Din