Joanne Whalen, Extension IPM Specialist; jwhalen@udel.edu Alfalfa Economic levels of pea aphids and alfalfa weevil (http://ag.udel.edu/extension/IPM/ExtensionFactSheets/AlphalfaWeevilIPM-1.pdf) can be found in fields at this time. When sampling for aphids and weevils, collect a minimum of 30 random stems throughout a field… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu In last week’s Weekly Crop Update, I gave some recommendations for petiole sap nitrate and potassium levels in plasticulture strawberries. This is based on sampling leaf petioles from the most recently expanded… Continue Reading
Kate Everts, Vegetable Pathologist, University of Delaware and University of Maryland; keverts@umd.edu I wrote last week about some new and recent fungicide registrations of interest to vegetable growers. Two additional registrations occurred in the last week. · Luna Experience has… Continue Reading
Kate Everts, Vegetable Pathologist, University of Delaware and University of Maryland; keverts@umd.edu Bacterial fruit blotch (BFB) BFB of watermelon, which is caused by the bacterium Acidovorax avenae subsp. citrulli, produces large olive green to brown water-soaked lesions on fruit, making… Continue Reading
Cory Whaley, Sussex Co. Extension Ag Agent; whaley@udel.edu and Joanne Whalen, Extension IPM Specialist; jwhalen@udel.edu Tomato pinworms have recently been found infesting tomatoes in a greenhouse in Delaware. According to Jerry Ghidiu, an entomologist with Rutgers University, once pinworms become… Continue Reading
