Most of New Jersey has been plagued by heavy regular rains and pop-up thunderstorms making conditions ideal for pathogens such as Phytophthora and Pythium. Unfortunately, Pythium 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 […]
Continue reading...April 8, 2020 Andy Wyenandt
Controlling purple blotch in leeks and onion
Purple blotch – Purple blotch, caused by Alternaria porri, may survive on infected plant material in overwintered plantings and may cause problems in spring transplanted fields and seedbeds. Symptoms of Purple blotch include tannish-brown, elongated, concentric, circular lesions with chlorotic margins with lesions running parallel with leaf veins. As the weather begins to warm up […]
Continue reading...April 7, 2020 Dave Schmitt
Tree Fruit IPM Report for April 7, 2020
Special Announcement! : The long awaited update to the NJ Commercial Tree Fruit Production Guide is available. We have updated the pesticide tables to include new products, pesticide safety, and efficacy. We hope to have the text sections updated for 2021. Tree Fruit Phenology: Tree Fruit Phenology remains advanced, but development is slowing. In southern […]
Continue reading...April 6, 2020 Andy Wyenandt
Spear Damage in Asparagus
Spear damage in asparagus can be caused by diseases such as Phytophthora spear and crown rot and purple spot. However, other environmental factors during the spring can damage spears as they emerge from the soil. Freeze Injury – About 10 days ago temperatures dipped well below freezing for a night or two, and combined with the higher than […]
Continue reading...April 6, 2020 Andy Wyenandt
Controlling Septoria Leaf Spot and Bacterial Leaf Blight in Parsley
Septoria leaf spot (SLS) in Parsley can cause significant losses in fields where it has become established. Like other Septoria’s, the leaf spots produced on parsley look much like the leaf spots produced on tomatoes and other crops. Septoria leaf spot overwinters from year to year on infected debris so long crop rotations of 2 […]
Continue reading...April 4, 2020 Andy Wyenandt
Vegetable Disease Update – 4/4/20
Warmer days and cool nights, along with cool soils and the regular wet weather has made conditions ideal for disease development in some spring crops. Growers should consider applying preventative fungicide applications for early-season diseases, particularly root rots, either in the transplant water or shortly after transplanting or seeding to help mitigate potential issues. All […]
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