Remote sensing is promising technology which can analyse spectral properties of the earth surface from various distances ranging from satellites to ground based platforms. Remote sensing playing huge role in agricultural crop production including crop protection. The data helps to find out the variability in reflectance spectra of plants resulting from the occurrence of various pests and diseases, nevertheless technical constraints and issues inherent to variability in host–pathogen interactions. The spectral sensors like multispectral, hyper spectral sensors and magnetic sensors cameras collect electromagnetic information to derive large scale information related to earth surface and atmosphere and data obtained here is digital. Quantified and manipulated by using computers. remote sensing have lot of scope in detecting and monitoring the diseases so that it reduces risk and minimize the damage.

Keywords : spectral sensors, Electromagnetic images, hostpathogen interaction, Disease detection and monitoring.