An unexpected sample walked into the laboratory at the end of last week. Net blotch, which is caused by the fungus Drechslera dictyoides, was subsequently diagnosed on a sample of turf-type tall fescue.
Continue reading...April 28, 2013 Andy Wyenandt
Growers Guide to the DMI or SBI Fungicides (FRAC code 3)
The DMI (DeMethylation Inhibitors) or SBI (Sterol Biosynthesis Inhibiting) fungicides belong to FRAC code 3 which include the triazoles and imidazoles. Some of these fungicides are commonly known as Tilt (propiconazole), Rally (myclobutanil), Folicur (tebuconazole), and Procure (triflumizole).
Continue reading...April 28, 2013 Richard Buckley
Take Off Your Rose Colored Glasses
Downy mildew was identified in Knock Out® rose samples submitted to the Plant Diagnostic Lab from a south-Jersey nursery this week. Knock Outs®, which have few problems, have been a favorite in New Jersey landscapes in recent years. Unfortunately, it seems this plant has met its Achilles’ heel.
Continue reading...April 26, 2013 Andy Wyenandt
Vegetable Disease Briefs – 4/26/13
Leaf spots were reported in spinach and other greens this past week. Growers should remain diligent and scout on a regular basis. With the dry weather expected over the next week, any use of overhead irrigation will help spread potential disease. Growers should apply preventative fungicides in advance of any disease developement or use of […]
Continue reading...April 26, 2013 Andy Wyenandt
Vegetable Diseases of the Week – 4/26/13
Rhizoctonia root rot on infected strawberry. Leaf spot on strawberry. Sunscald injury on stems of newly transplanted pepper seedlings caused by stems laying against edges of black plastic mulch on hot, sunny days.
Continue reading...April 26, 2013 Andy Wyenandt
Vegetable Disease Update – 4/26/13
Cole crops Spinach Strawberry Cole crops Downy Mildew and Alternaria – Symptoms of downy mildew include purple to yellowish-brown spots on upper leaf surfaces. A grayish-white spore mass will develop and cover the underside of leaves under ideal temperatures (night temperatures of 46 to 61°F and day temperatures below 75°F. Downy mildew can kill young […]
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