Vegetable Disease Control Laboratory of Amanda J. Gevens
In this issue: EPA Public Comment Period for ESA Fungicide Strategy – extended to Jul 20 | Potato Early and Late Blight Disease Risk Model Updates | White Mold of Potato and Management Strategies | Colorado Potato Beetle (2nd gen updates) | Potato Virus Y Management | UW Hancock ARS Field Day Agenda
In this issue: Weather and Potato Production Updates | Potato Early and Late Blight Disease Risk Model Updates | Early Blight Fungicides | Corn Tar Spot Updates | Corn Earworm, Diamondback Moth, Japanese Beetle, Cucumber Beetle and Colorado Potato Beetle updates and management
In this issue: Vegetable Insect Update – Russell L. Groves, Professor and Associate Department Chairperson, UW–Madison, Department of Entomology, 608-262-3229 (office), (608) 698-2434 (cell), e-mail: rgroves@wisc.edu, Vegetable Entomology Webpage: https://vegento.russell.wisc.edu/ Imported cabbageworm – Pieris rapae https://vegento.russell.wisc.edu/pests/cabbage-maggot/ Also known as cabbage whites or small whites, cabbage loopers and diamondback moths are the three most significant caterpillar …
In mid-December 2025, AMVAC Chemical Corporation, the manufacturers of the fungicide Blocker (pentachloronitrobenzene, PCNB), decided to stop producing Blocker 4F and 10G. In effect, this concludes production of Blocker for the future. The Blocker that is on the shelves at this time is all that will be available for future use. It is estimated that this will leave potato growers with a supply that may satisfy only 25-33% of the potato use demand in 2026.
In This Issue: Hop fungicide list for downy and powdery mildew diseases with activities.
In this issue: Potato production updates Russet Burbank Injury. Disease forecasting for early and late blight in potato. Hop downy and powdery mildew.
In this issue. New fruit extension pathologist Disease forecasting tools. Special pesticide registrations for 2020.