Potato Disease Forecasting Report 5-28-13 – Click to Download We will be tracking DSVs for Late blight development and calculating P-days for initiating the first early blight fungicide application. The first late blight fungicide application is recommended once 18 DSVs accumulate from green row. Green row typically occurs around the first week in May in southern […]
Continue reading...May 24, 2013 Administrator
Red Thread Disease is Active
By Jim Murphy Several weeks ago the cool wet weather brought on some red thread disease activity that has increased over the past 4 to 5 days. Turfs under low maintenance, particularly low nitrogen fertility, have been the areas with the greatest amount of red thread. This disease has been active on on slender and strong […]
Continue reading...May 24, 2013 Mark VanGessel
Postemergence Sprays for Corn Fields with Palmer Amaranth
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu I have seen Palmer amaranth seedlings emerging in corn fields that had no preemergence herbicides applied. There are Palmer amaranth plants in DE and MD that are resistant to glyphosate. So fields with Palmer amaranth present, or fields where you suspect it is present, need to be treated with an […]
Continue reading...May 24, 2013 Administrator
Crabgrass is Emerging
By Jim Murphy Very small first and second leaves of emerging crabgrass can be seen now in open turf areas. During the last couple weeks, we have seen crabgrass emerging from open turf areas that were previously infested with crabgrass. Crabgrass emergence will probably occur later than this on better maintained turfs with a dense […]
Continue reading...May 24, 2013 Andy Wyenandt
Two Viruses Found Throughout Strawberry Fields in US
The following article has edited and reprinted with permission from the original authors: Chuck Johnson, Virginia Tech and Kathy Demchak, Penn State University Two strawberry viruses are causing problems for strawberry growers in Eastern and Mid-west states this spring. The viruses (strawberry mottle virus, abbreviated SMoV) and strawberry mild yellow edge virus (SMYEV) have been […]
Continue reading...May 24, 2013 Andy Wyenandt
Late Blight Found on Heirloom Tomatoes in West Virginia
Late blight was found on heirloom tomatoes being grown hydroponically near Winchester, West Virginia on May 24th. Winchester, WV is just below the southern border of Virginia. This is the first report of Late blight in the region this year. There is no immediate threat to tomato or potato growers in New Jersey. However, this should remind everyone […]
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