Frequently Asked Questions about Mode of Action
Rinskor™ active is a member of what herbicide chemical family?
Rinskor is a member of the arylpicolinates, a completely new class of synthetic auxin chemistry within the Herbicide Resistance Action Committee’s Group O category. Chemical substitutions resulting in the addition of an aryl ring to the pyridine-carboxylate auxin molecules yielded a new compound with significantly increased herbicidal potency that paved the way for a completely new generation of lower-dose-rate, synthetic auxin herbicides.
What is the herbicide mode of action of Rinskor? What advantage does this offer to growers?
Rinskor is a synthetic auxin herbicide active ingredient that acts through a synthetic auxin (growth regulator) mode of action. With Rinskor, farmers will have an alternative auxinic herbicide mode of action to manage susceptible weed biotypes that are resistant to other herbicide modes of action, including acetolactate synthase (ALS) and glyphosate resistance.
What separates Rinskor form other auxinic herbicides?
Rinskor mimics naturally occurring hormones by binding with specific auxin receptors in the cell’s nucleus. The pattern and level of affinity of Rinskor to bind with specific receptors differentiates it from other synthetic auxin herbicides.
I heard Rinskor is an auxin. Does this mean it has the same spectrum, performance and symptoms to those observed in products like 2,4-D/MCPA/Triclopyr?
Not necessarily. Although it shares the same MOA with other herbicides belonging to the HRAC group O, as an arylpicolinate herbicide it binds differentially to specific binding receptors. This is reflected in unique attributes in terms of weed spectrum, low use rates, low volatility and an excellent profile from the environmental, toxicology and ecotoxicology profiles. Its uniqueness is also reflected in the kind of symptoms observed with Rinskor, especially in grasses and sedges, characterized for the swelling of the weed crown tissue followed by necrosis and plant death.
Why if Rinskor belongs to the auxin chemical group, do you say that it can control grasses, such as Echinochloas and Urochloas? I know auxins are mostly broadleaf weed specific.
Although the product belongs to the synthetic auxins or growth regulator chemical group (HRAC Group O), it is unique as it belongs to the arypicolinate family of chemistry. These types of products are known for binding preferentially to different auxin receptors, as compared to other auxins. Thanks to this specific characteristic, Rinskor can offer differentiated activity in the mentioned grasses.