Metazachlor 500g/L SC – Selective Herbicide for Oilseed Rape and Vegetable Crops

Metazachlor 500g/L SC è un chloroacetamide-class herbicide formulated as a suspension concentrate (SC), targeting grass and broadleaf weeds in oilseed rape, cabbage, and other brassica crops. As a very-long-chain fatty acid (VLCFA) synthesis inhibitor (HRAC Group 15), it disrupts cell division in germinating weeds, providing pre-emergent control with partial post-emergent efficacy. Its SC formulation ensures superior soil adhesion and rainfastness within 1–2 hours

Specifiche tecniche

Parametro	Specificazione
Principio attivo	Metazachlor 500 g/L (50% w/v)
Classe chimica	Chloroacetamide (VLCFA inhibitor)
Tipo di formulazione	Concentrato in sospensione (SC)
Modalità d'azione	Inhibits fatty acid elongation → disrupts cell membrane formation
Erbacce target	Alopecurus myosuroides (erba nera), Capsella bursa-pastoris (borsa del pastore), Stellaria media (erba stella), Poa annua (annual meadow grass)
Solubilità	450 mg/L (20°C)
Emivita del suolo	DT₅₀: 20–40 days (moderate persistence)
Durata di conservazione	2 years (store at 5–30°C; avoid freezing)

Caratteristiche e vantaggi principali

✅ Controllo ad ampio spettro:

Suppresses >25 grass and broadleaf weeds, including resistant Alopecurus myosuroides 3.
✅ Sicurezza delle colture:
Selective for oilseed rape, cabbages, e cauliflower; no phytotoxicity at recommended doses.
✅ Applicazione flessibile:
Efficace per pre-emergenza (soil-incorporated) or post-emergenza precoce (weed ≤2 leaves).
✅ Resistenza alla pioggia:
Requires only 1–2 ore to adhere to soil particles.

Linee guida per l'applicazione

Coltura	Dosaggio (L/ha)	Erbacce target	Tempistica
colza	1,0–1,5	Black-grass, chickweed	Pre-emergence or early post-sowing
Cabbage/Cauliflower	0,8–1,2	Annual grasses, purslane	Pre-plant soil incorporation
Mustard	1.0–1.3	Shepherd’s purse, fumitory	Post-emergenza precoce

Pratiche critiche:

Attivazione: Requires 10–15 mm rainfall/irrigation within 5 days.
Volume dello spruzzo: 200–300 L/ha (use medium-coarse nozzles).
Partner di Tank-Mix: Combina con quinmerac (broadleaf enhancement) or clomazone (residuo esteso).

Profilo di sicurezza e ambiente

Parametro	Dati	Note normative
Tossicità per i mammiferi	Low (Rat oral LD₅₀: >2,000 mg/kg)	Classe III dell'OMS (leggermente pericoloso)
Ecotossicità	Highly toxic to fish (LC₅₀: 0.1 mg/L)	50 m di spazio cuscinetto dai corpi idrici
Legatura del terreno	Koc: 100–300 (moderate leaching risk)	GUS index: 2.4 (medium)
Intervallo di rientro	24 ore	PPE: Gloves, goggles, coveralls

Precauzioni:
⚠️ Evitare la deriva: Sensitive to legumes, cereals, and solanaceous crops.
⚠️ Restrizioni rotazionali: Wait 30 days for cereals; 60 days for spinach/lettuce.

Advantages vs. Alternatives

Caratteristica	Metazachlor 500g/L SC	Standard S-Metolachlor
Spettro delle erbacce	Superior broadleaf control	Primarily grasses
Compatibilità delle colture	Optimized for brassicas	Limited to maize/soybeans
Gestione della resistenza	Effective against HRAC 1/2-resistant weeds	Narrower efficacy

Stato di registrazione globale

Unione Europea: Approved (Reg. No. 123456789).
Canada: PMRA-approved for oilseed crops (2023).
LMR:
- Rapeseed: 0.01 ppm (EU)
- Cabbage: 0.05 ppm (Codex).

Imballaggio e movimentazione

Dimensioni commerciali: 1L, 5L, 20L HDPE jugs.
Immagazzinamento: Keep in original containers; avoid temperatures >35°C.
Primo soccorso:
- Skin contact: Wash with soap/water immediately.
- Eye exposure: Rinse for 15 minutes; seek medical help if irritation persists.