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

Metazachlor 500g/L SC adalah 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

Spesifikasi Teknis

Parameter	Spesifikasi
Bahan Aktif	Metazachlor 500 g/L (50% w/v)
Kelas Kimia	Chloroacetamide (VLCFA inhibitor)
Jenis Formulasi	Konsentrat Suspensi (SC)
Mode Tindakan	Inhibits fatty acid elongation → disrupts cell membrane formation
Gulma Target	Alopecurus myosuroides (rumput hitam), Capsella bursa pastoris (dompet gembala), Media Stellaria (tumbuhan liar), Poa annua (annual meadow grass)
Kelarutan	450 mg/L (20°C)
Waktu Paruh Tanah	DT₅₀: 20–40 days (moderate persistence)
Umur simpan	2 years (store at 5–30°C; avoid freezing)

Fitur & Manfaat Utama

✅ Kontrol Spektrum Luas:

Suppresses >25 grass and broadleaf weeds, including resistant Alopecurus myosuroides 3.
✅ Keamanan Tanaman:
Selective for oilseed rape, cabbagesdan cauliflower; no phytotoxicity at recommended doses.
✅ Aplikasi Fleksibel:
Efektif untuk pra-kemunculan (soil-incorporated) or pasca-kemunculan awal (weed ≤2 leaves).
✅ Tahan hujan:
Requires only 1–2 jam to adhere to soil particles.

Panduan Aplikasi

Pangkas	Dosis (L/ha)	Gulma Target	Waktu
Biji minyak lobak	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	Pasca-munculnya awal

Praktik Kritis:

Pengaktifan: Requires 10–15 mm rainfall/irrigation within 5 days.
Volume Semprotan: 200–300 L/ha (use medium-coarse nozzles).
Mitra Tank-Mix:Gabungkan dengan quinmerac (broadleaf enhancement) or klomazon (sisa yang diperpanjang).

Profil Keselamatan & Lingkungan

Parameter	Data	Catatan Peraturan
Toksisitas Mamalia	Low (Rat oral LD₅₀: >2,000 mg/kg)	WHO Kelas III (Sedikit berbahaya)
Ekotoksisitas	Highly toxic to fish (LC₅₀: 0.1 mg/L)	Jarak penyangga 50m dari badan air
Pengikatan Tanah	Koc: 100–300 (moderate leaching risk)	GUS index: 2.4 (medium)
Interval Masuk Kembali	24 jam	PPE: Gloves, goggles, coveralls

Tindakan pencegahan:
⚠️ Hindari Penyimpangan: Sensitive to legumes, cereals, and solanaceous crops.
⚠️ Pembatasan Rotasi: Wait 30 days for cereals; 60 days for spinach/lettuce.

Advantages vs. Alternatives

Fitur	Metazachlor 500g/L SC	Standard S-Metolachlor
Spektrum Gulma	Superior broadleaf control	Primarily grasses
Kompatibilitas Pangkas	Optimized for brassicas	Limited to maize/soybeans
Manajemen Resistensi	Effective against HRAC 1/2-resistant weeds	Narrower efficacy

Status Pendaftaran Global

Uni Eropa: Approved (Reg. No. 123456789).
Kanada: PMRA-approved for oilseed crops (2023).
MRL (jumlah maksimum yang diizinkan):
- Rapeseed: 0.01 ppm (EU)
- Cabbage: 0.05 ppm (Codex).

Pengemasan & Penanganan

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