Quasar k.e.

Mechanism of Action and Selectivity

Quasar EC is a systemic herbicide based on quizalofop-P-ethyl (aryloxyphenoxypropionate group). Unlike contact products, the active ingredient penetrates the leaf structure and moves through the phloem to the growth points, blocking lipid biosynthesis. This is crucial for controlling perennial grasses like couch grass (Elytrigia repens), as the herbicide destroys both the foliage and the underground rhizome system.

Technical Specifications

The Emulsifiable Concentrate (EC) formulation ensures superior adhesion to the waxy layer of grassy weeds, increasing efficacy even under challenging weather conditions. As a selective herbicide, Quasar allows for post-emergence application on sugar beet, winter rapeseed, soy, sunflower, and potato crops without the risk of phytotoxicity to the main crop.

Application Guidelines

• Action Type: Post-emergence foliar herbicide.
• Dosage: The application rate ranges from 0.5 to 2 liters per hectare, depending on the weed species composition and growth stage.
• Safety: Classified as Hazard Class 2; strict adherence to personal protective equipment protocols is required during handling.
• Frequency: Limited to one treatment per season to ensure efficacy while preventing residues in the harvest.

The manufacturer, Jinan Kesaijinong Chem. Co. Ltd. (Jinan, China), focuses on high purity of the active ingredient, which effectively inhibits the growth of grasses without affecting broadleaf species.