Weed Management by Herbicide for Physiological and Quality Parameters in Mustard (Brassica juncea L. Czern & Coss.)

Abstract

A field experiment on Weed management in herbicide for growth and yield attributing characters in
mustard was conducted on the RMD College of Agriculture & Research Station, Ambikapur, during the
Rabi season of 2012-2013. Soil of the experimental field was sandy loam in texture. 12 treatments with
different herbicidal combination of weed management practices were study in randomized block design
and 3 times replicated. weed control treatments Pendimethalin @ 1.0kg/ha PE, Glyphosate 50gm/ha alone
after emergence of Orobanche, Trifluralin @ 1.5kg/ha PPI, Glyphosate 25gm/ha alone with 1% solution
NH4SO4 at 40 DAS, Neem cake at 200kg/ha in furrow and Pendimethalin at 0.5kg/ha (PE) followed by 1
hoeing at 40 DAS, Neem cake at 200kg/ha in furrow followed by Imazethapyr 30gm/ha at 20DAS,
Trifluralin @ 1.5kg/ha +Neem oil 1% PPI, soybean oil 2 drops/shoot after emergence of Orobanche,
Application of 25% extra dose of phosphorus and phosphorus solubilizing bacteria, Trichoderma viride
2.5kg/ha as basal application, Farmers practice-1 hoeing at 40DAS and Weedy check. The study of
revealed that the plant population was uniform under various weed control treatments. Leaf area index
data pertaining to LAI at successive growth stages. The maximum LAI was recorded in treatment T1
which was significantly higher over weedy check and T6 but at par with T7, T5 and T3 at 30 and 60DAS.
Further it was clear that the treatments T4, T2, T8, T9, T10 and T11 gave also higher LAI which were
statistically at par to each other & significantly superior over weedy check & T6 treatment at 30 and
60DAS. Where as in 90DAS LAI was significantly higher in T1 over weedy check and T6 treatment but
at par with T7, T5, T3, T4 & T2.Weedy check. Crop growth rate (g/ day/ m2) the rate of increase in the
biomass per unit time provided an important physiological index suggesting growth of the plant in a
definite interval. The CGR was computed from the relevant data collected from field and lab work, for
different stages. CGR calculated at 30-60DAS, 60-90DAS and 90-harvest of crop growth was not
influenced by any weed management treatment. Relative growth rate (g/ g/ day). the rate of increase in
the biomass per unit time provided an important physiological index suggesting growth of the plant over
the previous growth in a definite interval. The RGR was computed from the relevant data collected from
field and lab work, for different stages. RGR calculated at 30-60 DAS, 60-90DAS and 90-harvest
intervals of crop growth rate was not influenced by all integrated weed management treatment. Oil
content (%) is Analysis of variance revealed that oil content in seed did not differ significantly among
different weed control treatments. However, it varied from 39.80 to 40.52 per cent. The maximum oil
yield was recorded in treatment T1 which was significantly higher over weedy check. All the weed
control treatments noted higher oil yield over weedy check.