MASTAC, V.R., (CLOPIRACID, 300 G/L)

Effective eradication of persistent weeds

When Canada thistle or perennial sow thistle invade your fields, the struggle can become an exhausting war of attrition. The systemic herbicide "Mastak" from the Chinese manufacturer "Nanjing Essence Fine-Chemical Co., Ltd." is the "heavy artillery" needed to resolve the issue in a single pass. In my field experience, what matters most is its selectivity: it leaves the crop untouched while mercilessly eliminating weeds by penetrating deep into their root systems.

Field Application Insights

The product comes as a water solution, which makes preparing tank mixtures significantly easier. You can forget about clogged nozzles — the solution mixes perfectly, leaves no residue, and is easy to dose. With a consumption rate of 0.3–0.5 L/ha, a single container covers a substantial area, keeping your treatment costs transparent and manageable.

• Safety and Selectivity: Used on rapeseed and cereals, the crops remained robust with no signs of stunting following application.
• Systemic Action: The active ingredient, Clopyralid (300 g/l), is rapidly absorbed by leaves and translocated throughout the entire plant. Even if you miss the peak growth window, the herbicide reaches the core growth points of thistles and knotweeds.
• Weed Control: It handles common chamomile, cornflowers, and troublesome perennials that usually survive after standard herbicide treatments.

Practical Application Tips

As this is a post-emergence foliar herbicide, timing is key to hitting the active growth phase of the weeds. I prefer applying it during warm weather when plants are actively transpiring; this maximizes the systemic effect. Keep in mind that "Mastak" is designed for one treatment per season, which is sufficient to clear the field and give your crop a clear head start. With a toxicity class 3 rating, standard PPE is required, but overall, it remains a reliable and predictable asset in any agronomist’s toolkit.