Vegetable Crop Update – Sep 20, 2026
In this issue: Potato Early and Late Blight Disease Risk Modelling and Management | Late Blight Risk Post Vine-Kill | Cucurbit Downy Mildew Updates
Vegetable Disease Control Laboratory of Amanda J. Gevens
In this issue: Potato Early and Late Blight Disease Risk Modelling and Management | Late Blight Risk Post Vine-Kill | Cucurbit Downy Mildew Updates
In this issue: Potato Early and Late Blight Disease Risk Modelling and Management | Cucurbit Downy Mildew Updates | Winter Squash Harvest and Storage to Manage Common Fruit Diseases
In this issue: Potato Early and Late Blight Disease Risk Modelling and Management | Cucurbit Downy Mildew Updates | Potato Pythium Leak Symptoms & Management
In this issue: Wisconsin Weather & Potato Productivity | Potato Early and Late Blight Disease Risk Modelling and Management | Cucurbit Downy Mildew Updates
In this issue: Potato Early and Late Blight Disease Risk Modelling and Management | Cucurbit Downy Mildew Updates | Tomato Bacterial Canker Symptom Identification & Management | Potato Black Dot Information Survey | UW Extension Crop Rotation for Cleaner Water and Soil Health Field Day
In this issue: Potato Early and Late Blight Disease Risk Modelling and Management | Potato & Tomato Late Blight Management Strategy | Cucurbit Downy Mildew Updates | Corn Earworm Updates and Management | Two-Spotted Spider Mites Updates and Management
Please note an important disease update. Potato late blight (clonal lineage/genotype US-23) was discovered in a south-western Michigan County (St. Joseph) on August 12, 2026. Initial characterization of the pathogen was completed by Rob Schafer and his lab at Mid-Michigan Agronomy in DeWitt Michigan. Samples were also sent to Dr. Phillip Wharton at the University …
In this issue: Potato Early and Late Blight Disease Risk Modelling and Management | Cucurbit Downy Mildew Updates | Weather and Potato Production Updates | Aphid Pests of Vegetable Crops | UW Extension Potato Groundwater Quality Field Day Update
In this issue: Potato Early and Late Blight Disease Risk Model Updates | Cucurbit Downy Mildew Updates | Hail Damage and Disease Management | European Corn Borer Updates and Management | Corn Earworm Updates and Management
In this issue: Dry Weather and Irrigation Considerations for Vegetables | Potato Early and Late Blight Disease Risk Model Updates | Blackleg, Aerial Stem Blight, Tuber Soft Rot of Potato Management | Cucurbit Downy Mildew Update | Potato and Sugar Beet Diseases