Department of Botany and Plant Pathology Lilly Hall of Life Sciences
Plant Disease Control BP-10

Directory of Fungicides for Indiana Vegetable Diseases
Richard X. Latin, Extension Plant Pathologist

This directory can be used to cross-reference selected vegetable diseases and registered fungicides (or bactericides in the case of copper compounds) for their control. Emphasis is given to stem, leaf, and fruit diseases of vegetable crops grown in Indiana. Fungicide product labels should be consulted for application rates and intervals, harvest restrictions, and safe-handling information. The product label is the definitive source of information about the fungicide in question.

For satisfactory disease control, diagnose problems accurately prior to selection and application of fungicides. A good reference for diagnosing vegetable diseases is Identifying Diseases of Vegetables.* It includes color prints and accurate descriptions of disease symptoms. Copies of this and various plant disease control bulletins are available from the Department of Botany and Plant Pathology at Purdue University.

How to Use the Directory

Selected vegetable crops and diseases are cross-checked with fungicides listed by their common names at the top of Table 1. (Common names are names coined for active ingredients fungicides. Several different commercial
products may contain the same active ingredient and have the same common name.) Table 2 lists common names, product trade names, product producers, and product formulations. An alphabetized list of fungicide trade names and corresponding common names is provided in Table 3. Below are two examples of how this directory can be used:
Example 1. Suppose rust has been diagnosed as a problem in snap beans and you wish to know which fungicides can be used against rust. According to Table 1, chlorothalonil, maneb, and zineb will protect beans from rust. Names of commercial products with these common names are listed in Table 2. The commercial products include Bravo 500 (chlorothalonil); Dithane M22, Dithane FZ, Manzate, and Manex (maneb); Dithane Z78 and Zineb 75WP (zineb).
Example 2. Suppose Dithane M45 is recommended for tomato disease control and you wish to know the specific diseases it will protect against. According to Table 3, the common name of Dithane M45 is mancozeb. Refer to the mancozeb column and tomato disease section in Table 1. The tomato diseases which Dithane M45 (mancozeb) will protect against are indicated by"• " and include anthracnose, early blight, gray leafspot, late blight, and Septoria leafspot.

MacNab, A. A., et al., Dept, of Plant Pathology, The Pennsylvania State University.
Cooperative Extension Service • Purdue University • West Lafayette, Indiana