Joanne Whalen, Extension IPM Specialist; jwhalen@udel.edu Alfalfa Continue to sample for potato leafhoppers on a weekly basis. We are starting to see a significant increase in populations. Once plants are yellow, yield loss has already occurred. The treatment thresholds are… Continue Reading
Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu Location: Art and Keith Wicks Farm, Rt 9, Little Creek, Kent County. Greenrow: May 3 Date Late Blight Early Blight Spray Interval Recommendation DSV Total DSV Accumulated P-days 6/6 1 58 251 10-days 6/6-6/8… Continue Reading
Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu Conditions have not been very favorable for fruit rot lately but we always seem to run the risk of scattered thunderstorms and frog-strangling rain events at this time of the year. Phytophthora blight is… Continue Reading
Kate Everts, Vegetable Pathologist, University of Delaware and University of Maryland; keverts@umd.edu Basil Downy Mildew Downy mildew on basil has been confirmed in Dunkirk, MD (Calvert County between the DC metro area and Southern Maryland). The infected plants are in… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu We are starting to see evidence of air pollution damage in sensitive vegetable plants. Those vegetables most susceptible include potatoes, watermelons, cantaloupes, snap beans, pumpkins, and squash. Damage is most common during… Continue Reading
