Quin Star

Mechanism of action and selectivity of Queen Star

The product is based on the active ingredient quizalofop-P-ethyl, a compound from the aryloxyphenoxypropionate group. Unlike non-selective herbicides, this component demonstrates high selectivity, targeting specifically the acetyl-CoA carboxylase (ACCase) enzyme in the meristematic tissues of grass weeds. Due to its systemic nature, the product is rapidly absorbed by the leaf surface and translocated to growth points, blocking lipid synthesis essential for the formation of weed cell membranes.

Technical aspects of application

The emulsifiable concentrate ensures stability of the working solution and optimal adhesion to the leaf surface. When dealing with fields infested by couch grass, wild oats, or foxtail, "Queen Star" acts as a reliable post-emergence tool. It is crucial to note that maximum efficacy is achieved when applied to actively growing weeds, regardless of the crop's growth stage.

• Systemic action: Complete cessation of weed growth is observed within a few hours of absorption, with tissue necrosis occurring within 7–10 days.
• Dosage flexibility: Application rates range from 2.0 to 3.0 L/ha and above, allowing for customization based on the specific weed pressure in the field.
• Safety: With a hazard class of 3 and a short pre-harvest interval (only 1 day), the product is technologically convenient for late-season treatments on vegetables, rapeseed, soybeans, and sunflowers.

Using "Queen Star" from Nanjing Essence Fine-Chemical Co., Ltd. allows for the mitigation of competition from annual and perennial grasses without the risk of phytotoxicity to the target crop, which is critical during its vital growth stages.