Bio-efficacy of metribuzin based herbicide mixtures on weeds and productivity of wheat

SARITA RANI; SURESH KUMAR; V.S. HOODA; SATISH KUMAR

doi:10.59797/ija.v66i4.2885

Authors

SARITA RANI
SURESH KUMAR
V.S. HOODA
SATISH KUMAR

DOI:

https://doi.org/10.59797/ija.v66i4.2885

Keywords:

Wheat, Metribuzin, Herbicide mixture, Clodinafop, Fenoxaprop, Pinoxaden, Weed control efficiency

Abstract

A field experiment was conducted during 201415 and 201516 at Hisar, Haryana, to study bioefficacy of metribuzin-based herbicide mixture on weeds and producitivty of wheat (Triticum aestivum L.). The experiment was conducted in a split-plot design comprising 5 wheat varieties WH 1105, HD 2967, DPW 621-50, WH 1124 and DBW 17 in main plots and 6 weed-management practices, viz. metribuzin (210 g/ha), metribuzin + fenoxaprop (150 + 100 g/ha), metribuzin + pinoxaden (150 + 40 g/ha) metribuzin + clodinafop (150 + 45 g/ha), weed-free and weedy check, in subplots, each replicated thrice. The wheat varieties did not affect the weed den- sity and weed dry-matter accumulation. Wheat variety WH 1105 resulted in the maximum grain, straw and biologi- cal yields, being statistically at par with HD 2967 and DPW 621-50, but significantly better over DBW 17 and WH 1124. Among the herbicides, the density of grassy and total weeds and their dry-matter accumulation at all stages were observed minimum with metribuzin + fenoxaprop which remained at par with other 2 combinations of metribuzin, whereas density and dry matter of broad-leaf weeds were found minimum with metribuzin alone (210 g/ha). Alone application of metribuzin resulted in the lowest grain yield of wheat as compared to all the other herbi- cidal treatments.

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Table 4. Effect of varieties and weed-management practices on yields, harvest index and benefit: cost ratio of wheat (pooled data of 2 years)

Treatment Grain yield Straw yield Biological Harvest index Benefit:

(t/ha) (t/ha) yield (t/ha) (%) cost ratio

WH 1105 5.63 8.83 14.46 38.9 1.77

HD 2967 5.54 8.73 14.27 38.7 1.74

DPW 621-50 5.46 8.10 13.56 40.25 1.69

WH 1124 4.97 7.55 12.52 39.7 1.55

DBW 17 5.26 8.00 13.26 39.65 1.64

SEm 0.08 0.09 0.11 0.6 -

CD (P=0.05) 0.24 0.30 0.37 NS -

Weed management

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Weedy-check 3.98 6.47 10.44 38.1 1.35

SEm 0.16 0.12 0.19 0.8 -

CD (P=0.05) 0.44 0.34 0.55 NS -

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