Vol. 10, Issue 10 (2021)

Author(s):
Sathishkumar K, Veeramani A, Subramanian E, Sivakumar T, Mini ML and Prema P

Abstract:
The Cyprus rotandus is a perennial menace weed which cause potential yield loss in crop plants. The present study was conducted to reveal the effect of maize allelochemicals and maize based cropping system for efficient and ecofriendly management. The study was designed to evaluate in randomized block design with three replications during summer, 2021 at Agricultural College and Research Institute, Madurai. A total of nine treatments were formulated for evaluation of Cyperus rotundus growth and development. The parameters i.e., height, density, dry weight, and nutrient uptake of Cyperus rotundus were recorded at 20, 40, and 60 days after sowing. Amongst the treatments T₈- Application of glyphosate at 1.5-2.0 kg ha^-1 in maize identified as best suited treatment to control the Cyper rotandus in terms of weed control efficiency they obtained at 20 DAS (62 per cent), 40 DAS (95 per cent), and 60 DAS (91 per cent). The treatments T₁-maize as a sole crop and T₂- cowpea with maize intercropping obtained with weed control efficiency of 73.63 and 71.08 percent, respectively at 60 DAS. Being the application of glyphosate at 1.5 to 2.0 kg ha^-1 in maize field (T₈) said to be the best treatment, by adopting the environmentally safe approaches the treatments cowpea with maize at 4:1 ratio (T₂) and maize as a sole crop (T₁) are recommended for eco-friendly management of cyperus rotandus.