GREWAL, S.SNIRMAL SINGH2020-03-062020-03-061992http://krishikosh.egranth.ac.in/handle/1/581014446609052017_0005_0016_004195.pdf09052017_0005_0016_Abstract.pdfENGLISHEFFECT OF CROP MANAGEMENT PRATICES ON THE INCIDENCE OF WHEAT APHID COMPLEXThesis