Cucurbit powdery mildew (CPM), caused by Podosphaera xanthii, is one the most important diseases of cucurbit crops throughout the world. The pathogen is an obligate parasite, just like cucurbit downy mildew, meaning it needs a living host in order to survive. In northern regions that have a killing frost in the fall the pathogen will die out when the crop freezes. Not being able to overwinter, the pathogen must be re-introduced each spring or summer in the mid-Atlantic region. The pathogen accomplishes this by re-infecting cucurbit crops in the spring as they are planted up the east coast starting in Florida, then the Carolina’s, Virginia, and so forth. By late May, as soon as cucurbit crops begin to germinate in the mid-Atlantic region, the potential threat for potential powdery mildew infections begin. [Read more…]
NEW – Ornamental IPM Website & Upload of 6/10 Webinar – Next Session Tuesday 6/24
Still time to Sign up for the 2025 – Rutgers Ornamental IPM Program
(Join us for the next Session Tuesday 6/24/25)
UPLOADS 6/10 SESSION: (contains information on oriental beetle, SLF, Two-spotted spider mites, soft scales, box tree moth, bacterial shothole, virus symptoms)
Previous webinars:
- Click here for a PDF of May 27, 2025 webinar (contains information on flathead borers, Armored scales, bagworms, Volutella, Mildews) Click here for VIDEO of May 27, 2025 webinar
- Click here for a PDF of May 13, 2025 webinar (contains information on scales and oomycetes) Click here for VIDEO of May 13, 2025 webinar
- Click here for a PDF of April 22, 2025 webinar (contains information on RHFB and early Clearwing borer treatments) Click here for VIDEO of April 22, 2025 webinar
- Click here for a PDF of April 08, 2025 webinar (Contains information on aphids and boxwood leafminer) Click here for VIDEO of April 08, 2025 webinar
New –Rutgers Ornamental IPM Program Website
With links to all PDFs and recorded Webinars
Pest and Disease specific information
…and ever expanding Resources
Click here for the NEW Rutgers Ornamental IPM Program Website
Cucurbit powdery mildew control in 2025
Cucurbit powdery mildew (CPM), caused by Podosphaera xanthii, is one the most important diseases of cucurbit crops throughout the world. The pathogen is an obligate parasite, just like cucurbit downy mildew, meaning it needs a living host in order to survive. In northern regions that have a killing frost in the fall the pathogen will die out when the crop freezes. Not being able to overwinter, the pathogen must be re-introduced each spring or summer in the mid-Atlantic region. The pathogen accomplishes this by re-infecting cucurbit crops in the spring as they are planted up the east coast starting in Florida, then the Carolina’s, Virginia, and so forth. By late May, as soon as cucurbit crops begin to germinate in the mid-Atlantic region, the potential threat for potential powdery mildew infections begin. [Read more…]
Controlling fungal leaf blights of Carrot
Powdery mildew, Alternaria and Cercospora are three important fungal foliar pathogens that can cause early defoliation in carrots, thus reducing yields and making harvest difficult. Each pathogen produces distinct symptoms. [Read more…]
Controlling fungal leaf blights of Carrot
Powdery mildew, Alternaria and Cercospora are three important fungal foliar pathogens that can cause early defoliation in carrots, thus reducing yields and making harvest difficult. Each pathogen produces distinct symptoms. [Read more…]
Controlling fungal leaf blights of Carrot
Powdery mildew, Alternaria and Cercospora are three important fungal foliar pathogens that can cause early defoliation in carrots, thus reducing yields and making harvest difficult. Each pathogen produces distinct symptoms. [Read more…]