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

Metazachlor 500g/L SC ni a 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

Maelezo ya kiufundi

Kigezo	Vipimo
Kiambatanisho kinachotumika	Metazachlor 500 g/L (50% w/v)
Hatari ya Kemikali	Chloroacetamide (VLCFA inhibitor)
Aina ya Uundaji	Kuzingatia Kusimamishwa (SC)
Njia ya Kitendo	Inhibits fatty acid elongation → disrupts cell membrane formation
Lenga Magugu	Alopecurus myosuroides (nyasi nyeusi), Capsella bursa-pastoris (mkoba wa mchungaji), Vyombo vya habari vya Stellaria (kikuku), Poa annua (annual meadow grass)
Umumunyifu	450 mg/L (20°C)
Udongo Nusu ya Maisha	DT₅₀: 20–40 days (moderate persistence)
Maisha ya Rafu	2 years (store at 5–30°C; avoid freezing)

Sifa Muhimu & Manufaa

✅ Udhibiti wa Wigo mpana:

Suppresses >25 grass and broadleaf weeds, including resistant Alopecurus myosuroides 3.
✅ Usalama wa Mazao:
Selective for oilseed rape, cabbages, na cauliflower; no phytotoxicity at recommended doses.
✅ Programu inayobadilika:
Inafaa kwa kabla ya kuibuka (soil-incorporated) or mapema baada ya kuibuka (weed ≤2 leaves).
✅ Kunyesha kwa mvua:
Requires only Saa 1-2 to adhere to soil particles.

Miongozo ya Maombi

Mazao	Kipimo (L/ha)	Lenga Magugu	Muda
Ubakaji wa mbegu za mafuta	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	Mapema baada ya kuibuka

Mazoea Muhimu:

Uwezeshaji: Requires 10–15 mm rainfall/irrigation within 5 days.
Kunyunyizia Kiasi: 200–300 L/ha (use medium-coarse nozzles).
Washirika wa Mchanganyiko wa Tank: Kuchanganya na quinmerac (broadleaf enhancement) or clomazone (mabaki yaliyopanuliwa).

Wasifu wa Usalama na Mazingira

Kigezo	Data	Vidokezo vya Udhibiti
Sumu ya Mamalia	Low (Rat oral LD₅₀: >2,000 mg/kg)	Daraja la III la WHO (Hatari kidogo)
sumu ya mazingira	Highly toxic to fish (LC₅₀: 0.1 mg/L)	50m buffer kutoka kwa vyanzo vya maji
Kufunga kwa udongo	Koc: 100–300 (moderate leaching risk)	GUS index: 2.4 (medium)
Muda wa kuingia tena	Saa 24	PPE: Gloves, goggles, coveralls

Tahadhari:
⚠️ Epuka Drift: Sensitive to legumes, cereals, and solanaceous crops.
⚠️ Vizuizi vya Mzunguko: Wait 30 days for cereals; 60 days for spinach/lettuce.

Advantages vs. Alternatives

Kipengele	Metazachlor 500g/L SC	Standard S-Metolachlor
Spectrum ya Magugu	Superior broadleaf control	Primarily grasses
Utangamano wa Mazao	Optimized for brassicas	Limited to maize/soybeans
Usimamizi wa Upinzani	Effective against HRAC 1/2-resistant weeds	Narrower efficacy

Hali ya Usajili Ulimwenguni

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

Ufungaji & Utunzaji

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

❓ Maswali Yanayoulizwa Mara kwa Mara

Swali: Je, inaweza kudhibiti magugu yaliyoanzishwa?
A: Limited to germinating weeds; ineffective beyond 2-leaf stage.

Q: Compatibility with glyphosate?
A: Yes – enhances burndown in no-till systems; add ammonium sulfate for hard water.

Swali: Athari kwa minyoo ya ardhini?
A: Low risk (LC₅₀: >100 mg/kg soil) – passes OECD 222 tests.

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