An Alternative Mode of Action to get TOUGH on resistant weeds
A RELIABLE SOLUTION TO A “GROWING” PROBLEM…
In response to the growing issue of resistant weed management, Belchim Crop Protection USA brings TOUGH® 5EC to growers in the United States. The active ingredient in TOUGH® 5EC is pyridate, an underutilized chemistry in the United States.
RESEARCHED & PROVEN PERFORMANCE
For the past several years, Belchim Crop Protection USA has coordinated with key universities across the US corn belt to evaluate TOUGH® 5EC in numerous research trials. Results have shown significant increase in weed control when TOUGH® 5EC is included in the tank mix. Increased weed control of 5% to as much as 29% has been observed; especially when herbicide resistance to other classes of chemistry are present in the weed population.
TOUGH® 5EC PHOTOSYNTHESIS II INHIBITOR
Pyridate works by blocking a weed’s photosystem II process, triggering the release of toxic forms of oxygen and causing rapid cell wall degradation. Pyridate is a highly effective mode of action in corn and shows increased levels of weed control in tank-mix combinations.
- Pyridate is applied after emergence of the weed.
- Pyridate is quickly absorbed by the leaves (rain-fast within 60 minutes).
- Pyridate blocks photosystem II of the weed by irreversibly binding to the D1 protein and inhibiting the transport of electrons. High energy electrons then interact with oxygen, producing toxic forms of oxygen.
- The toxic forms of oxygen interact and degrade the cell’s membranes resulting in necrosis (browning) and ultimate death to the weed.
TOUGH® 5EC SYNERGIZES HPPD’s
For over a decade, weed resistance (Palmer Amaranth and Common Waterhemp) to HPPD inhibitors (Group 27) has been on the rise. TOUGH® 5EC is an ideal tank mix partner, as a resistance management tool, with HPPD inhibitors. TOUGH® 5EC herbicide puts a charge in your post emergence weed control program with rapid and complete control of your broadleaf weeds including resistant Common Waterhemp, Palmer, Pigweed and Giant Ragweed. Field research has shown adding TOUGH® 5EC to the mix, improves performance; promoting faster weed death and overcoming HPPD resistance.
Pyridate Increases Free Radicals:
- Free radicals are single oxygen molecules that disrupt cell membranes causing cell collapse
HPPD’s:
- Reduce the plants ability to detoxify these free radicals so its a one, two punch.
TOUGH® 5EC ENHANCES ATRAZINE
TOUGH® 5EC is a great product to combine with PSII’s that interact with the weed differently, such as Atrazine. Pyridate has fast foliar absorption to get to the target site but also degrades rapidly in the soil to prevent carry over concerns. Atrazine has slow leaf absorption and primarily works through root absorption which requires moisture. Atrazine has residual effects for weed control but can result in carry over; maximize the PSII class with this combination.
WHY IS “SHARPENING” CONTROL 5-10% IMPORTANT??
Resistant weeds such as Palmer Amaranth and Common Waterhemp can produce 100,000 to 400,000 seeds when competing with a crop. These seeds are small (1-2mm) and are easily dispersed by wind, animals, livestock feed and equipment.
Say for example, a post emergence product provides 95% control; that would still allow 5% (50 seeds per acre) to escape. Based on this, the potential for escape is 50 X 400,000 = 20 million seeds per acre! That’s 460 per square foot!
While tillage can bury a lot of seeds deeper than they can germinate the following year, research revealed viability, even when buried 6” deep:
1 year ~ 20% viable, 2 years ~ 10% viable, and 3 years ~ 5% viable.
Just 8 waterhemp per 11 square feet can reduce corn yield by 74% (Steckel 2007)
Add TOUGH® 5EC to the post emergence tank mix and reduce the seed bank!