Jerry Brust, IPM Vegetable Specialist, University of Maryland; jbrust@umd.edu It is odd that we would have a couple reports of an unusual disease of brassicas turn up in the same week, but we did. Clubroot, caused by Plasmodiophora brassicae, is… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Cauliflower, cabbage, Brussels sprouts, Chinese cabbage (Napa cabbage) and lettuce are susceptible to tipburn. This problem can cause severe economic losses. Tipburn is a breakdown of plant tissue inside the head of… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Pea planting has progressed significantly this week and potato planting is well underway. Timing of spring-planted vegetables will depend on soil conditions, soil temperatures, and long-term weather forecasts. We currently are in… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Calcium Deficiency Calcium deficiency is most commonly seen as tipburn of cauliflower, cabbage, and Brussels sprouts. Chinese cabbage (Napa cabbage) is also susceptible to tipburn. This problem can cause severe economic losses.… Continue Reading
David Owens, Extension Entomologist; owensd@udel.edu Diamond back moth numbers have been elevated this season. Larvae are small, smooth, green, often hold their anal prolegs out in a V-shape and wiggle violently when disturbed. Imported cabbageworm on the other hand is… Continue Reading
