questions: query regarding fish mortality due to aquatic weeds (pistia). 
 answers: pistia  (aquatic weeds)- amonia (harbicides)- 1% aqueous solution (dose)-	foliar spraying (application method)
	                                       paraquat(harbicides)-   0.2	 (dose)   -                              foliar spraying (application method)
immediately stop the application of feed and fertilization, manually (netting, siphoning), liming- 160 kg/bigha/year (5-6 ph), 133 kg/bigha/year (6-6.5 ph), 55kg/bigha/year (6.5-7.5 ph). 1/3 rd of whole quantity applied 1st installment remaining quantity divided into 11 equal installment applied monthly basis.