Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Sulfur is considered one of the secondary macronutrients that vegetable crops require for growth. Sulfur is a component of four amino acids and is therefore critical for protein formation. It is also… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Mid-April is when plastic mulch laying starts for many of our summer crops. Each year we see problems with low bed pH under plastic mulch. This can result in a range of… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu The following are minimum pHs for various vegetable crops. Crop Min. pH Cucumbers, cantaloupes, squash, pumpkins 5.8 Watermelons 5.5 Tomatoes, peppers, and eggplant 5.8 Cole crops (broccoli, cabbage, cauliflower, Brussels sprouts, kale,… Continue Reading
David Owens, Extension Entomologist, owensd@udel.edu Asparagus Scout for asparagus beetle adults and eggs on emerging spears. Eggs are small, cylindrical and dark colored. They stick into the spear at a 90-degree angle. There are two species that feed on asparagus,… Continue Reading
