About the Handbook
Prepared by Texas Extension Plant Pathologists
This website is an electronic version of the Texas Plant Disease Handbook that was developed by Extension Plant Pathologist in the late 1980s. Some information on this site, such as those referring to treatments and chemicals, may be outdated. It is the responsibility of the enduser to refer to pesticide product label for proper usage and rates. We strive to continually update the information in this document to provide enduser with the best available information on plant disease that are common in Texas.