Vegetable Crop Update – Sep 28, 2025
In This Issue: Late blight updates for potato/tomato | Cucurbit downy mildew updates
Vegetable Disease Control Laboratory of Amanda J. Gevens
In This Issue: Late blight updates for potato/tomato | Cucurbit downy mildew updates
Hollow heart, depending on its severity, is also called brown center. Hollow heart is characterized by the formation of an irregular cavity in the flesh of the tuber, usually surrounded by dark brown tissues. Heat necrosis is also referred to as internal brown and internal necrosis, which is characterized by small, brown, necrotic lesions or spots inside the vascular ring of the tuber.
In This Issue: End of season crop production comments | Potato tuber heat necrosis and hollow heart | Late blight updates for potato/tomato | Cucurbit downy mildew updates | Pink eye of potato
While every growing season typically offers a few weather hiccups, some years offer a few more extreme disruptions than typical. Extreme temperatures, in concert with moisture stress, exacerbate disease risk at the time of harvest and beyond.
In This Issue: Disease forecasting updates for potato early blight and late blight | Cucurbit downy mildew updates | Post-harvest diseases of potato and their management
In This Issue: Disease forecasting updates for potato early blight and late blight | Cucurbit downy mildew updates | Black dot and silver scurf of potato
As the potato harvest season advances, late-season tuber diseases are of concern. Two diseases in particular—black dot (Colletotrichum coccodes) and silver scurf (Helminthosporium solani)—can diminish tuber quality, reduce storability, and lead to post-harvest losses. Managing these diseases requires careful attention in the late season, as cultural and harvest practices can influence disease.
In This Issue: Vegetable production updates | Disease forecasting updates for potato early blight and late blight | Cucurbit downy mildew updates | Angular leaf spot of cucurbits
In This Issue: Disease forecasting updates for potato early blight and late blight | Cucurbit downy mildew updates | Phytophthora crown and fruit rot in cucurbits and solanaceous crops | Corn earworm and its management | PVY and its management
In This Issue: Disease forecasting updates for potato early blight and late blight | Cucurbit downy mildew updates | Tomato Septoria disease and management