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 […]
Continue reading...April 26, 2013 Administrator
A Few Reminders About Lumax and Lexar Herbicides
By Mark VanGessel, Extension Weed Specialist; mjv@udel.edu The formulations of Lumax and Lexar have been changed to Lumax EZ and Lexar EZ. Both products still contain mesotrione, atrazine, and s-metolachlor; and in the same ratios as the old formulations. The concentration of Lexar remained the same and the use rates are the same for the […]
Continue reading...April 26, 2013 Ann Gould
April showers bring May….diseases?
Although the weather this weekend promises to be lovely, recent rains and the likelihood of more to come is ideal for the development of foliar diseases in the landscape. The most common diseases on trees and shrubs affect the foliage as spots, blotches, and blisters. Although unsightly, most foliar diseases do not greatly impact the […]
Continue reading...April 26, 2013 Dave Schmitt
Oriental Fruit Moth Update
In southern counties we have accumulated approximately 102 DD base 45 since the biofix set on 4/16. Based on the current forecast, insecticides for OFM control should be applied in 7-10 days. In northern counties, only 14 DD have accumulated since the biofix set on 4/22 so no applications for OFM will be needed for […]
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