By Mark VanGessel, Extension Weed Specialist; mjv@udel.edu Working with Bill Bamka, County Extension Educator from Burlington County NJ, UD Weed Science Program confirmed that a population of common ragweed in New Jersey is resistant to glyphosate. The long-term history of the field is not known, but the past couple of years it was planted with […]
Continue reading...May 10, 2013 Mark VanGessel and Bill Bamka
Common Ragweed Resistant to Glyphosate Identified in New Jersey
May 10, 2013 Mark VanGessel
Soil Disturbance Can Reduce Effectiveness of Some Herbicides
By Mark VanGessel, Extension Weed Specialist; mjv@udel.edu This is an article written by Dwight Lingenfelter and Bill Curran from Penn State and modified for Delaware. As more farmers use vertical tillage to manage crop residues or to mellow the seedbed prior to planting (especially soybeans), questions have arisen about possible impacts of using these types […]
Continue reading...May 10, 2013 Mark VanGessel
Morningglory Control in Soybeans
By Mark VanGessel, Extension Weed Specialist; mjv@udel.edu I always get questions on what to use to control mornningglory in soybeans at about the time to spray postemergence. Morningglory control starts at planting with a preemergence herbicide with broadleaf products such as Canopy, Valor XLT, Envive, Fierce, Prefix, Sonic or the Authority products. These will need […]
Continue reading...May 10, 2013 A.Wyenandt, W.Kline, and J.Ingerson-Mahar
Potato Disease Forecasting Report 5-10-13
Potato Report 5-10-13 – Click to Download Welcome to the new potato report for 2013! As always, we will be tracking DSVs for Late blight development and calculating P-days for initiating the first early blight fungicide application. Remember the threshold for P-days is 300! Once 300 P-days is reached for your location early blight fungicide […]
Continue reading...May 10, 2013 Meredith Melendez
FDA Food Safety Q&A: Growing, Harvesting, Packing & Holding Produce
The FDA Proposed Produce Food Safety Rule Q & A conference call, coordinated by the Produce Safety Alliance, discussed the growing, harvesting, packing and holding of produce. Here are the questions and answers from that call: 1. Will growers be expected to use food grade containers?
Continue reading...May 10, 2013 A.Wyenandt, W.Kline, and J.Ingerson-Mahar
Tomato Disease Forecasting Report 5-10-13
5-10-13 Tomato Report – Click to Download Disease severity values (DSVs) for early blight, septoria leaf spot, and tomato anthracnose development are determined daily based on leaf wetness (due to rainfall, dew) and air temperature. On a daily basis DSV values can range from 0 to 4 where 0 = no chance for disease development […]
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