Did you know that first EBDC fungicide was registered for use in vegetable crops in 1964 followed by chlorothalonil in 1966. Historically speaking, the first New Jersey Vegetable Production Recommendations Guide was produced in 1969 and was only 33 pages long (it’s 502 pages now). Things have changed significantly over the past 55 years when it comes to pest management! For a quick review on fungicides, FRAC groups, and managing fungicide resistance development please click on the links below.
Using tank mixes and fungicide rotations and information on FRAC group 4, FRAC group 7, and FRAC group 3 and FRAC group 11 fungicides.
As a reminder, the new 2024-2025 Mid-Atlantic Commercial Vegetable Production Recommendations Guide can be purchased at most county offices and is also available for FREE on-line here!
next production season. With the season we had last year and the wet spring we’ve had thus far this year season, pressure due to purple spot may be high. Control of purple spot can be difficult because of management issues (i.e., the mowing and chopping up and leaving of old fern material in the field) and because fungicides can’t be applied during the harvest season. Growers who had pre-mature defoliation issues last year may expect problems this spring. Remember, controlling purple spot begins with preventative fungicide applications during summer and fall by reducing infections to ferns and stalks. Weekly scouting should be done in the spring and followed up with additional scouting and timely fungicide applications once fern stalks are full size. Apply and rotate azoxystrobin (FRAC group 11) at 6.2 to 15.5 fl oz 2.08F/A with chlorothalonil at 2.0 to 4.0 pt/A.
