NOTES: For the disease control products listed below, one product trade name and formulation is provided for each active ingredient (common name) as an example of rates, preharvest interval (PHI), restricted entry interval (REI), and special instructions. In many cases, there are other products available with the same active ingredient. Please see Table 26 and Fungicides and Bactericides Alphabetical Listing by Trade Name for more information on products with the same active ingredients.
The symbol OG indicates a product is listed by the Organic Materials Review Institute (OMRI) as approved for use in organic production. See Organic Certification section for more details.
Gray Mold (Botrytis cinerea)
Botrytis cinerea is most problematic iunder wet conditions and as a secondary pathogen. Infected bracts will typically develop sunken brown lesions, with characteristic gray mold sometimes developing on the inside of bracts. Remove infected plant material and space plants further apart in future seasons to mitigate incidence of gray mold. Preventing insect feeding damage and other wounds can help mitigate the effect and spread of gray mold.
polyoxin D zinc salt (VEGGIETURBO 5% SC)OG: 6.5 to 13.0 fl oz/A; PHI 0d, REI 4h, Group 19; Do not apply more than 4.3 oz. a.i./acre/season (6 applications at maximum rate).
hydrogen peroxide plus peroxyacetic acid (Oxidate 2.0)OG: see label for rate; PHI 0d, REI 1h; Group NC; Use as preventative or curative.
pyraclostrobin plus boscalis (Pristine): 18.5 to 23.0 oz/A; PHI 0d, REI 12h; Groups 11 & 7; Do not apply as a tank mix and do not make more than 3 applications per year.
Verticillium Wilt (Verticillium dahliae)
The same strain of Verticillium wilt that affects strawberries and lettuce can also infect artichoke. Because this disease spreads through plants’ vasculature, symptoms often appear on only a lengthwise fraction of the plants, and appear as wilting, yellowing, or stunting. Avoid rotating artichokes with strawberries and lettuce.