Hello Everyone! Enclosed you will find updated product information from Dupont and an entomology update from Extension on brown stinkbugs in corn. I hope you are all doing well and hope this information may prove useful.
Sincerely,
Rick Morris
Classic® herbicide or Synchrony® herbicide can be tankmixed with normal overtop Roundup + fomesafen (Reflex, Flexstar, etc) mixtures for improved weed control in RoundupReady soybeans, or with Liberty in LibertyLink soybeans.
Use rate is .33 oz Classic or up to .375 oz Synchrony on any soybean variety. If the soybeans are STS™ or Bolt™, you can use higher rates of Synchrony.
(Obviously, if the soybeans are a conventional variety, (non RR or LL), you can use higher rates of Classic).
Key points:
Both Classic & Synchrony can be applied after the first trifoliate on soybeans has opened.
Below are the current Synchrony & Classic labels (the Classic label is being updated).
DuPont_Classic_Herbicide_Label
For any of you who have not sold any Trivence® herbicide yet in 2017, following wheat harvest especially in no-till, is a good place to sell some.
Trivence offers:
· Three (3) modes of action(MOA), which fits a resistance management program well.
· Excellent burndown of existing weeds behind wheat when mixed with Gramoxone, as an example.
· The PSII inhibitor effect from the metribuzin in Trivence slows the Gramoxone speed of kill, giving a more complete kill of existing weeds.
· Trivence offers slightly better control of sicklepod and other weeds, as well as improved control of grasses.
· Can be tankmixed with Prowl to add yet another MOA.
Be sure to check the soybean variety regarding metribuzin sensitivity, and do not apply to soils below .5% organic matter.
Trivence qualifies in the TruChoice Advantage grower program and can be financed with PHI on an approved loan.
A lot of tobacco is reaching button stage or close to it. Budworms are showing up in a lot of places.
Key points for Coragen® insecticide on budworms or hornworms:
Coragen continues to be the gold standard for worm control in tobacco and many other crops! It helps you meet your overall goals with DuPont and counts towards the $30,000 minimum in the TruChoice Advantage program who did not buy at least 200 acres Pioneer corn or soybeans.
It also can be financed with PHI on an approved loan.
For 2017 we’re recommending a 2 back to back spray program in the Carolina – VA peanut market. We advise that Fontelis should be used at a rate of 16 -24 oz. at days 60 and 75 days. This should be the 2nd and 3rd spray of 4 to 6 spray season. This would give good foliage and ground coverage. We also recommend that the grower stay on a 14-day schedule even on Bailey’s. University extension is saying that Bailey variety slipped backwards some last year in diseases tolerance. Remember that Fontelis is a high-end fungicide that is labeled for control of 10 diseases, plus suppression of CBR and Sclerotinia but it has to be used correctly.
Prevathon® insecticide for peanuts
Prevathon gives up to three weeks of outstanding worm control, plus suppression of lesser cornstalk borer. It easy on beneficials and does NOT flare spider mites!
Prevathon also pays qualifying growers $4/acre back in the TruChoice Advantage program and can be financed on PHI. Below are links for Fontelis One Sheeter and a short 5 slide presentation for your viewing.
DuPont Fontelis Fungicide for Profitable Peanut Production
Please let us know if you have any questions. Thanks much for your support.
Regards,
Wayne Vickers
DuPont Crop Protection
Check out the message below from Dr. Dominic Reisig, NCSU Extension Entomologist, discussing the management of stink bug in corn. I have seen stink bug in corn at high numbers this week. Wheat harvest and chemical burn down applications in soybean land have pushed them to move into corn. In recent vial bioassays, bifenthrin was the most effective pyrethroid for brown stink bug. Keep in mind that significant stink bug damage can occur prior to tasseling. Tank mixes with standard fungicide application timings may be too late. Pyrethroid applications need to penetrate the canopy to allow contact with the stink bugs to get adequate control. If you are considering an aerial application, discuss this with your aerial applicator. Treatment thresholds are one stink bug per four plants when the ear is forming, during elongation, and and the beginning of pollen shed. The threshold is one stink bug per two plants during the end of pollen shed and into the blister stage.
Regards,
Mac Malloy, Agriculture Agent – Field Crops
Insecticide Choice for Stink Bugs in Corn
Our laboratory recently completed a vial bioassay with brown stink bugs collected from wheat. These are the same stink bugs that move into corn. Our purpose was to see which pyrethroid was most effective in corn for brown stink bug. In small plot field studies in corn, we have not been able to distinguish one pyrethroid type from another. Based on this vial bioassay, bifenthrin was the clear winner.
The active ingredients we tested were bifenthrin, cyfluthrin (the parent compound of Baythroid XL, which is beta-cyflutrin), cypermethrin (the active ingredient in Ammo), and lambda-cyhalothrin (the active ingredient in Karate Z and Warrior II). Of the doses we tested, all stink bugs were killed at:
– 1 part per million- bifenthrin
– 25 parts per million- cyfluthrin
– 25 parts per million- cypermethrin
– 50 parts per million- lambda-cyhalothrin
In addition, at the highest labeled rate of bifenthrin, you can apply at 3x or more active ingredient compared to other pyrethroids. This supports other state recommendations for bifenthrin as the pyrethroid of choice to manage brown stink bug (for example, see the GA field corn recommendation here on page 57).
Be sure to work with your aerial applicator to ensure good coverage. Your insecticide will only work if it contacts the stink bugs, which often hide underneath leaves and between the ear folds and the stem. Thresholds are listed in this previous article.
-Dr. Dominic Reisig, NCSU Extension Entomologist