SAINI,MANOHAR LALAULAKH, DALBIR SINGH2020-01-242020-01-241967http://krishikosh.egranth.ac.in/handle/1/581014191420062017_0002_0015_006690.pdfENGLISHDISTRIBUTION AND PERSISTENCE OF SYSTEMS INSECTICIDES IN BRASSICA PLANTSThesis