Most of New Jersey has been wet making current conditions ideal for pathogens such as Phytophthora and Pythium. Unfortunately, Pythium cottony leak and Phytophthora blight can be found on most farms in the southern part of the state. Poor crop rotations with susceptible hosts only make matters worse. The Phytophthora pathogen has an increasing host […]
Continue reading...July 9, 2025 Andy Wyenandt
Bacterial leaf spot, copper resistance, hot water seed treatment, and viruses
Copper resistance in bacterial leaf spot of tomato and pepper crops has been detected at a high level in New Jersey the past few summers. While not surprising, copper resistance has been known to develop for decades now. Copper applications for the control of bacterial diseases in many crops has been a mainstay for decades […]
Continue reading...New Addendums for the USDA Harmonized and Harmonized Plus Audits
On July 3, 2025, the USDA Agricultural Marketing Service released 3 new addenda to the Harmonized and Harmonized GAP Plus+ Standards: Warehouse, Food Defense, and Integrated Pest Management. All of which will require additional records. Requirements in the existing Harmonized and Harmonized GAP Plus+ standards have not changed. These new standards, versions 3.1 and 5.1 […]
Continue reading...July 9, 2025 Andy Wyenandt
Preparing for Pepper Anthracnose in 2025
Pepper anthracnose caused by Colletotrichum spp. has become a significant problem on some farms in southern New Jersey. Unlike in tomato, where symptoms are only present in mature (red) fruit, pepper anthracnose can infect pepper fruit at any growth stage. Currently, there are no commercially-available bell or non-bell peppers with known resistance to anthracnose.
Continue reading...July 8, 2025 Andy Wyenandt
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 […]
Continue reading...Fruit IPM Report July 7, 2025
Peach: Brown Rot: Warm and wet weather this summer have been ideal conditions for brown rot to develop on fruit (Figure 1). Most growers should be relying on a captan based program for mid-season covers, followed by better materials during the last 3 weeks pre-harvest. For reference see Dr. Norm Lalancette’s post Improving Your Late […]
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