In 2004, cucurbit downy mildew re-emerged in the US with a vengeance causing significant losses in cucurbit production. In most years prior to this, concern for CDM control was minimal, since the pathogen arrived late in the growing season (in more northern regions), or the pathogen caused little damage, or never appeared. After 2004, with […]
Continue reading...May 21, 2021 Andy Wyenandt
Quick reviews of fungicide chemistries, FRAC groups, and fungicide resistance management
For a quick review on fungicides, FRAC groups, and managing fungicide resistance development please click on the links below. Using tank mixes and fungicide rotations and information on FRAC group 4, FRAC group 7, and FRAC group 3 and FRAC group 11 fungicides.
Continue reading...May 21, 2021 Andy Wyenandt
Preparing for cucurbit powdery mildew control
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...May 21, 2021 Andy Wyenandt
Preparing for Pepper Anthracnose
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...May 21, 2021 Steven K. Rettke
Landscape Pest Notes: Some Late-Spring Insects (Part 2)
Since there are still over 4-weeks before the official start of summer, the accumulation of growing-degree-days (GDD) will continue to accelerate over the next several weeks. Many of our landscape insect pests will be rapidly emerging and be entering their best control windows before they potentially cause feeding symptoms. This writing contains part 2 of […]
Continue reading...May 20, 2021 Andy Wyenandt
Early-season Phytophthora blight and Rhizoctonia root rot control.
Phytophthora blight typically develops in low-lying areas after a heavy rain. Fortunately, this spring in New Jersey has been really dry – too dry thus far, but that does not need you don’t need to prepare for potential phytophthora issues down the road. This is particularly important if are in fields with a known history […]
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