Remote sensing is a fast, non-invasive, and effective technology for acquiring and analysing spectral properties of earth surfaces from a wide range of distances, including satellites and ground-based platforms. This cutting-edge technology has the potential to revolutionise agricultural crop production, including crop protection. The presence of disease and pests causes variations in the reflectance spectra of plants, which can be identified using remote sensing data undefined. For the identification of plant diseases, various spectroscopic and imaging approaches have been examined, including visible, infrared, multiband, and fluorescence spectroscopy, fluorescence imaging, multispectral and hyperspectral imaging, thermography, nuclear magnetic resonance spectroscopy, and so on. In phytopathometry, several of these approaches have a lot of promise. Remote sensing technologies will be tremendously useful in spatializing diagnostic data, making agriculture more sustainable and safer while reducing the costly use of pesticides for crop protection.