Tebuthiuron 80% WDG – Soil-Residual Herbicide for Total Vegetation Control

Tebuthiuron 80% WDG bir persistent urea herbicide formulated as a water-dispersible granule, designed for long-term suppression of broadleaf weeds, grasses, and woody plants in non-crop areas (industrial sites, railways) and select crops (sugarcane, pineapples). As a photosynthesis inhibitor (PSII, HRAC Group 5), it provides 1–2 years of residual control through root uptake and soil mobility, making it ideal for low-maintenance vegetation management .

Teknik Özellikler

Parametre	Şartname
Etken Madde	Tebuthiuron 80% (w/w)
Kimyasal Sınıf	Substituted urea (PSII inhibitor)
Formülasyon Türü	Suda Dağılabilen Granül (WDG)
Etki Şekli	Blocks electron transport in PSII → disrupts photosynthesis
Target Vegetation	Broadleaves, grasses, shrubs (Cynodon, Amaranthus, Acacia)
Çözünürlük	Moderate (2,500 mg/L at 25°C)
Toprak Yarı Ömrü	DT₅₀: 180–360 days (persistent)
Raf Ömrü	3 years (store at 10–30°C in dry conditions)

Critical Use Restrictions

Non-Selective: Total vegetation control – avoid near desirable plants.
Groundwater Hazard: High leaching risk (GUS index: 3.8) – prohibited in sandy soils or near aquifers .
Global Bans: Withdrawn in EU (2002) and Australia; restricted use in USA/Canada .

Başvuru Kılavuzları

Kayıtlı Kullanımlar:

Alan	Dozaj (kg/ha)	Target Vegetation	Yöntem
Industrial Sites	4.0–8.0	Brush, perennial grasses	Soil-surface broadcast
Sugarcane (Pre-plant)	2.0–3.0	Cynodon daktilon, Sorgum halepense	Toprakla bütünleşme
Ormancılık	3.0–6.0	Woody invasives (Acacia)	Spot treatment

Temel Uygulamalar:
⚠️ Aktivasyon: Requires 25–50 mm rainfall within 10 days.
⚠️ Tampon Bölgeler: 100m from water bodies, 500m from croplands.
⚠️ Single Application Limit: ≤8 kg/ha/year to reduce leaching risk .

Çevresel ve Güvenlik Profili

Parametre	Veri	Düzenleyici Durum
Memeli Toksisitesi	Moderate (Rat oral LD₅₀: 644 mg/kg)	DSÖ Sınıf II (Orta derecede tehlikeli)
Ekotoksisite	Extremely toxic to fish (LC₅₀: 0.09 mg/L)	EPA Restricted Use Pesticide (RUP)
Toprak Bağlayıcı	Koc: 80 (high leaching potential)	GUS index: 3.8 (high risk)
Yeniden Giriş Aralığı	48 saat	Full PPE mandatory

Avantajlar ve Sınırlamalar

Avantajlar:
✅ Long-Term Control: 12–24 months suppression after single application.
✅ Uygun Maliyetli: Reduces mechanical clearing by 80% in trials.
✅ Direnç Yönetimi: Glifosat'a dirençli yabancı otlara karşı etkilidir.

Sınırlamalar:
⚠️ Non-Target Damage: Root zone migration kills adjacent vegetation.
⚠️ Azim: Residual activity limits land reuse (wait 24+ months for sensitive crops).

Küresel Düzenleyici Durum

Bölge	Status	Key Restrictions
Amerika	Restricted Use (EPA Reg. No. 352-399)	Certified applicators only; groundwater monitoring
Kanada	Limited registration (PMRA Dir. 2017-01)	Prohibited in areas with <60 cm soil depth
AB	Banned (2002)	—
Brezilya	Approved for sugarcane (2021)	Mandatory 500m crop buffers

Handling & Storage

Paketleme: 25 kg moisture-proof bags with inner liner.
Depolama: Secure, ventilated area; separate from food/feed.
Spill Response: Contain with absorbent material; collect in sealed containers.
İmha etmek: Incinerate at licensed facilities (>1,000°C) .