Active ingredient

Imazethabenz

Description

Mode of action

Imazethabenz belongs to the imidazolinone chemical class and is a highly effective systemic herbicide. Upon contact with the plant, it is rapidly absorbed by both leaves and roots, subsequently translocating via the xylem and phloem to meristematic tissues.

The mechanism of action is based on the inhibition of the acetolactate synthase (ALS) enzyme. Blocking this enzyme disrupts the synthesis of essential branched-chain amino acids, specifically valine, leucine, and isoleucine.

The disruption of protein biosynthesis leads to an immediate cessation of cell division at the weed's growing points. Consequently, metabolic processes within the weeds terminate, leading to gradual wilting and eventual plant death.

A characteristic feature of its action is the onset of chlorosis symptoms, followed by tissue necrosis. Complete mortality of susceptible weed species usually occurs within 2 to 4 weeks after application.

Due to its systemic properties, imazethabenz provides prolonged crop protection by inhibiting the germination of new weed seeds, provided there is adequate soil moisture.

What it targets

This substance is primarily used for controlling a broad spectrum of broad-leaved and some grass weeds in leguminous crop fields.

It is effective against many difficult-to-control weed species, including various types of lambsquarters, smartweeds, pigweed, and ragweed. It also provides suppression of certain annual grass species during their early developmental stages.

The high selectivity of the compound allows for the efficient cleaning of crop fields from weed vegetation without causing significant damage to the main crop.

To achieve maximum biological efficacy, it is crucial to select the optimal growth stage of the weeds: the active growth period from emergence to the formation of the first true leaves is ideal.

  • Redroot pigweed
  • Common lambsquarters
  • Smartweed species
  • Common ragweed
  • Shepherd's purse

Rates and timing

Application rates vary depending on the weed species composition, the degree of field infestation, and the specific soil and climatic conditions of the region.

Applications are generally recommended during the weed growth phase when they are most vulnerable, ensuring a rapid and stable herbicidal effect in the field.

Sufficient soil moisture is a critical condition, as the substance exhibits its maximum activity within the soil solution, providing a soil barrier against new weed flushes.

The spray solution must be distributed as evenly as possible across the field using calibrated spraying equipment to prevent streaking or uneven application.

It is advised to avoid treatments during periods of extreme temperatures or when crop plants are under severe stress from frosts or pest infestations.

Restrictions

When using imazethabenz, strict crop rotation restrictions must be observed, as the substance can remain active in the soil for an extended period.

Sowing sensitive crops in the following season is not recommended without performing deep tillage or soil analysis to check for residual herbicide levels.

The use of this herbicide on soils with low organic matter content and extremely high pH is strictly prohibited, as it may exacerbate phytotoxicity for subsequent crops.

When handling the product, personal protective equipment for skin and respiratory tract must be worn, strictly adhering to sanitary standards for pesticide use.

Storage must be maintained in closed warehouse facilities, inaccessible to children and pets, while strictly observing required temperature ranges.

Regulatory

Status in the European Union

Not approved in the EU

Category (EU)
HB - Herbicide
EU legislation

EU status is for reference only and does not replace national registration in your country.