TY - GEN AU - Trigiano, Robert N AU - Windham, Mark T TI - Plant pathology : concepts and Laboratory exercises SN - 0849310377 U1 - 632,3078 TRI CY - London, CRC Press KW - Plant diseases, Plant pathogens, powdery mildews Ascomycota, Oomycota, Abiotic diseases Extra cellular enzymes, Host defenses, Media preparation ER -