Book excerpt: The book entitled ‘Nanophytopathology’ discusses the need for alternative technologies particularly smart nanotechnological tools including nanobiosensor in the detection of plant diseases, delivery of fungicides/pesticides, and therapy for the diseases caused by plant pathogens and pests. The use of nanomaterials will minimize the huge amount of application of pesticides and fungicides thereby reducing environmental pollution. This technology is eco-friendly, economically viable, and useful for sustainable crop production. The book encompasses chapters written by experienced experts in respective fields, which provide up-to-date knowledge about pathogen/pest control using nanotechnology. It will be essential reading for post-graduate students and researchers, agriculture scientists, nanotechnologists, microbiologists, green chemistry experts, and biotechnologists.