Cyperus rotundus(Nut Grass):                                                                                                                                                   

• It is a very persistent perennial sedge and occurs in all the crops.                           
• This weed spreads extensively and is a serious weed in many dry                
• land and irrigated crops in Andhra Pradesh.                                                   

Control:

• Mechanical methods kill only the top growth with little effect on tubers.
• Herbicide like glyphosate  @  1.5 kg a.i/ha which translocate rapidly into tubers to prevent regeneration of tubers.
• Other herbicides used for controlling this weed include 2,4-D@ 1.5 kg a.i/ha,sodium or EE formulation and Glyphosate  @  1.0 kg.ha  +2%  Ammonium sulphate is very effective.

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