Harmonik WG f.g. + PAR «Escort»

Mechanism of Action and Selectivity

The core of 'HarmonicWG v.g.' is thifensulfuron-methyl, a systemic herbicide from the sulfonylurea family. Unlike non-selective herbicides, this compound targets the acetolactate synthase (ALS) enzyme, effectively halting the biosynthesis of essential amino acids in broadleaf weeds. The crop selectivity in soybeans and corn is achieved through the plant's metabolic capacity to rapidly detoxify the active ingredient into inactive metabolites, ensuring the safety of the harvest.

The Role of 'Escort' Surfactant

The inclusion of the 'Escort' adjuvant is a technical necessity rather than an accessory. This surfactant significantly reduces the surface tension of the spray solution, delivering several practical advantages:

• Increased contact area on the leaf surface, ensuring superior coverage of wax-coated weeds.
• Enhanced penetration of thifensulfuron-methyl into the plant tissue, even under sub-optimal environmental conditions.
• Improved adhesion of the solution, preventing wash-off from light rain.

Field Application and Performance

As a selective post-emergence (insurance) herbicide, the product is engineered for high-precision tasks. With a application rate ranging from 0.005 to 0.015 kg/ha, accuracy is paramount. The product's formulation as water-dispersible granules, manufactured by Nanjing #1 Pesticide Factory of Red Sun Group Co., Ltd., offers significant operational benefits: the granules dissolve rapidly, prevent nozzle clogging, and eliminate dust formation during tank mixing.

Best results are achieved when targeting young, vigorously growing broadleaf weeds at the 2–4 leaf stage. Given that only one application per season is permitted, timing remains the most critical factor in achieving effective control and maximizing crop yield potential. The systemic nature of the herbicide ensures that the active ingredient moves throughout the plant to suppress weed growth effectively.