PPO-herbicides (Group 14) used in this area include Sharpen, Valor, Authority, Reflex, Blazer, Cobra, Aim, and Cadet. In addition to the single active ingredients, there are a number of premixes containing these PPO herbicides. This group is quite varied so making generalizations about these herbicides is difficult. PPOs have gained popularity in the past few […]
Continue reading...April 21, 2014 Mark VanGessel
DE, MD Fields with Palmer Amaranth Resistant to Both Glyphosate and ALS-Inhibiting Herbicides
Last fall we collected seed from Palmer amaranth plants in Delaware and Wicomico County, Maryland and tested them for resistant to both glyphosate or ALS-inhibiting herbicides (Group 2). A few of the samples tested positive for resistance to both glyphosate AND ALS-herbicide. We used Pursuit in the initial trials, but past experience indicates that these […]
Continue reading...April 21, 2014 Cesar Rodriguez-Saona
Cranberry Weevil Research
In field evaluations, we demonstrated that yellow sticky traps baited with the blend of four aggregation pheromone components trapped significantly more cranberry weevil adults than un-baited controls. Development of pheromone-based monitoring lures is an important step toward spatially-precise management techniques that may lead to significant reduction in the use of pesticides targeted against cranberry weevil […]
Continue reading...April 20, 2014 Raymond Samulis
Soil Temperatures and Seedlings
We recorded 56-58°F temperatures from soils in various Central Jersey commercial vegetable fields on April 15 –Tax Day– just before the recent multi-day cold front rolled in. The good news is 56-58°F was higher than I anticipated. What do soil temperatures have to do with your early vegetable seedlings? Mean spring soil temperatures determine early […]
Continue reading...April 14, 2014 Albrecht Koppenhofer
ABW Part 2: Managing Insecticide Resistant Populations
Having touble controlling your Annual Bluegrass Weevil (ABW) populations? You’re not alone. Insecticide resistance in ABW is a growing and expanding problem. And because the major resistance mechanism involved, enhanced metabolic detoxification of the insecticide active ingredients, is not very specific, the resistance can be very broad.
Continue reading...April 14, 2014 Michelle Infante-Casella
Spring Asparagus Production Notes
If you are planting a new field of asparagus or getting ready to harvest emerging spears, here are some thoughts: Are you planting 1-year old crowns or did you seed cell trays and are going to plant seedlings? Remember, 1 year old crowns are planted and not harvested that year. In the second year, only harvest […]
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