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

Metazachlor 500g/L SC is 'n 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

Tegniese Spesifikasies

Parameter	Spesifikasie
Aktiewe bestanddeel	Metazachlor 500 g/L (50% w/v)
Chemiese Klas	Chloroacetamide (VLCFA inhibitor)
Formuleringtipe	Suspensiekonsentraat (SC)
Wyse van Aksie	Inhibits fatty acid elongation → disrupts cell membrane formation
Teiken Onkruid	Alopecurus myosuroides (swartgras), Capsella bursa-pastoris (herder se beursie), Stellaria media (kikkerkruid), Poa annua (annual meadow grass)
Oplosbaarheid	450 mg/L (20°C)
Grond Halfleeftyd	DT₅₀: 20–40 days (moderate persistence)
Raklewe	2 years (store at 5–30°C; avoid freezing)

Belangrike kenmerke en voordele

✅ Breëspektrumbeheer:

Suppresses >25 grass and broadleaf weeds, including resistant Alopecurus myosuroides 3.
✅ Gewasveiligheid:
Selective for oilseed rape, cabbages, en cauliflower; no phytotoxicity at recommended doses.
✅ Buigsame Toepassing:
Doeltreffend vir vooropkoms (soil-incorporated) or vroeë na-opkoms (weed ≤2 leaves).
✅ Reënvastheid:
Requires only 1–2 uur to adhere to soil particles.

Aansoekriglyne

Gewas	Dosis (L/ha)	Teiken Onkruid	Tydsberekening
Oliesaad Raap	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	Vroeë na-opkoms

Kritieke Praktyke:

Aktivering: Requires 10–15 mm rainfall/irrigation within 5 days.
Spuitvolume: 200–300 L/ha (use medium-coarse nozzles).
TenkmengselvennoteKombineer met quinmerac (broadleaf enhancement) or klomasoon (uitgebreide residu).

Veiligheids- en Omgewingsprofiel

Parameter	Data	Regulatoriese Notas
Soogdiertoksisiteit	Low (Rat oral LD₅₀: >2,000 mg/kg)	WGO Klas III (Effens gevaarlik)
Ekotoksisiteit	Highly toxic to fish (LC₅₀: 0.1 mg/L)	50m buffer vanaf watermassas
Grondbinding	Koc: 100–300 (moderate leaching risk)	GUS index: 2.4 (medium)
Herbetredingsinterval	24 uur	PPE: Gloves, goggles, coveralls

Voorsorgmaatreëls:
⚠️ Vermy Drywing: Sensitive to legumes, cereals, and solanaceous crops.
⚠️ Rotasiebeperkings: Wait 30 days for cereals; 60 days for spinach/lettuce.

Advantages vs. Alternatives

Kenmerk	Metazachlor 500g/L SC	Standard S-Metolachlor
Onkruidspektrum	Superior broadleaf control	Primarily grasses
Gewasversoenbaarheid	Optimized for brassicas	Limited to maize/soybeans
Weerstandsbestuur	Effective against HRAC 1/2-resistant weeds	Narrower efficacy

Globale Registrasiestatus

EU: Approved (Reg. No. 123456789).
Kanada: PMRA-approved for oilseed crops (2023).
MRL'e:
- Rapeseed: 0.01 ppm (EU)
- Cabbage: 0.05 ppm (Codex).

Verpakking en hantering

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