Vegetable IPM Report 6-11-14 – Click to View | Download | Print
Maps for the Week
–European Corn Borer Population Map
–Corn Earworm Moth Pheromone Trap Map
–Pepper Weevil Trap Catch MapTopics for the Week
- Sweet Corn
- Cole Crops
- Peppers
- Tomatoes
- Pumpkins and Winter Squash
- Snap Beans
- Pepper Weevil Report
- BMSB
Archives for June 2014
Veg IPM Update: Week Ending 6/11/14
Thoughts on Postemergence Herbicide Applications
The early-planted corn fields should have been sprayed postemergence for later emerging weeds. In later planted fields, morningglories can be a challenge. Glyphosate is quite effective on small morningglories, but when they start to “run” or develop the vining growth habit, glyphosate is not as effective. If morningglories are an issue for your field, you should consider an additional 1.25 to 1.5 lbs of atrazine with your postemergence sprays in order to provide good residual control. However, this requires that applications be made before the corn is 12 inches tall. [Read more…]
Not All “Buggy-Whipping” in Corn is Due to Herbicides
Buggy-whipping in corn is a common sight early in the growing season and later under certain environmental conditions. The cause of buggy whipping is the abnormal formation of waxy leaf layers causing leaves to unfurl improperly. Agrichemicals and environment can cause this. [Read more…]
Tankmixing Reflex (fomesafen) with Glyphosate
There have been many situations where both fomesafen (active ingredient in Reflex) and glyphosate will complement each other for weed control. Syngenta has a premix of fomesafen plus glyphosate called Flexstar GT. Also, Reflex and glyphosate can be tankmixed, but there have been some situations of these two products not mixing well. The following is an article from Ken Smith from University of Arkansas entitled “Problem Solving Incompatible Tankmixes of Glyphosate and Reflex®”
Some growers have experienced cottage cheese spray mixtures when Reflex® and glyphosate were tankmixed in an effort to burn down existing weeds while applying Reflex® prior to cotton or soybean planting.
It seems that the potassium salts of glyphosate (WeatherMax, Touchdown, PowerMax etc.) are not very compatible with Reflex® . . . . Many of the generic glyphosate formulations are isopropyl or diammonium salts (not potassium salts) and will mix fine. A quick check of the label will give the salt used in the formulation.
If a mistake is made and Reflex® and the potassium salt of glyphosate is mixed and found to be incompatible, it can likely be brought back into solution by adding household ammonia. Start with 1% ammonia and begin agitation. More ammonia may be added if needed.
They’re Everywhere! They’re Everywhere!
Asian Longhorned Beetle and now the Emerald Ash Borer garner all the attention, but a group of tiny exotic wood boring beetles, known as “Asian Ambrosia Beetles,” has been quietly invading the state for the last decade. First appearing in our laboratory database in 2006, by 2008 these beetles had found widespread distribution in the mid-Atlantic and Northeast region.
Potato Disease Forecasting Report 6-10-14
Potato Disease Forecasting Report 6-10-14 – 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 New Jersey. An early season application of a protectant fungicide such as mancozeb (Dithane, Manzate, Penncozeb) or Bravo (chlorothalonil) as soon the field is accessible is suggested. Please be vigilant and keep a look out for suspect late blight infections on young plants. No late blight has been reported in our region to date.
Remember the threshold for P-days is 300! Once 300 P-days is reached for your location early blight fungicide applications should be initiated. Growers who are interested in using this model should chose the location above that is closest in proximity to their farming operation and should regularly check the Cornell NEWA website (http://newa.cornell.edu/) where this information is compiled from. Click on Pests Forecasts from the menu, select your weather station, and click on tomato diseases, set accumulation start date and a table of daily and total DSVs will be generated.