Active ingredient

Lenacil

Description

Lenacil is a selective active ingredient classified as a uracil derivative, commonly utilized as a soil-applied herbicide. It serves as a vital tool in modern agriculture for the control of a wide variety of annual broad-leaved weeds and specific grass species, ensuring crop protection during the early establishment phase.

The primary mechanism of action involves the inhibition of photosynthesis. Specifically, lenacil interferes with the electron transport chain within photosystem II. By being absorbed primarily through the roots of germinating seeds, the substance disrupts essential energy production, leading to the rapid decay and death of susceptible weed seedlings before or shortly after they emerge.

The main crop for lenacil application is sugar beet. Due to its selectivity, it provides excellent weed suppression without negatively impacting the crop, provided the dosage and timing guidelines are followed. Farmers frequently utilize it in combination with other herbicides to achieve a broader spectrum of control and to manage resistant weed populations effectively.

Application efficacy is heavily dependent on soil moisture conditions. For lenacil to be fully activated, the soil must contain sufficient moisture to carry the active substance into the root zone of the emerging weeds. Soil characteristics also play a role; soils with higher clay and organic matter content typically require higher application rates compared to light, sandy soils to maintain the same level of effectiveness.

Safety is a priority when handling lenacil-based formulations. Operators are required to wear appropriate personal protective equipment (PPE) to minimize exposure to skin, eyes, and lungs. Furthermore, strict adherence to spray drift management protocols is necessary to protect surrounding vegetation and aquatic environments from contamination, ensuring responsible chemical use in the field.

Regulatory

Status in the European Union

Approved in the EU

CAS number
2164-08-1
Category (EU)
HB - Herbicide
Approved from
01.07.2025
Approval until
30.06.2040
ADI
0.12 mg/kg bw/day
ARfD
Not appl.
AOEL
0.12 mg/kg bw/day
Hazard classification (CLP)
Aquatic Acute 1 - H400Aquatic Chronic 1 - H410Carc. 2 - H351

Regulatory status data: EU Pesticides Database © European Union, CC BY 4.0. EU status is for reference only and does not replace national registration in your country.

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