Dimethipin
Active ingredient

Dimethipin

Description

Mode of action

Dimethipin belongs to the thiadiazole chemical class. It is a contact plant growth regulator primarily used as an effective desiccant.

The substance penetrates plant tissues, disrupting water balance and accelerating the natural maturation process. It promotes rapid moisture loss from seeds and fruit tissues.

Unlike other chemicals, dimethipin acts gently without causing immediate cell necrosis, which helps preserve the quality of seed material.

The mechanism is based on the substance's ability to alter cell membrane permeability, leading to leaf wilting and accelerating the shedding of fruit or bolls.

The product does not have a significant impact on seed viability, making it a preferred choice for seed production farms.

What it targets

The main purpose of dimethipin is pre-harvest drying of agricultural crops to facilitate combine harvesting.

The product is most commonly used on sunflower crops, where it helps reduce seed moisture to optimal levels.

Dimethipin is also effective on cotton crops, ensuring high-quality defoliation and boll opening.

It is sometimes applied to rapeseed and other oilseed crops to prevent yield losses due to uneven ripening.

The product allows for a shortened waiting period before harvest, which is crucial during rainy autumns or when there is a risk of fungal infection due to excessive moisture.

Rates and timing

The application of dimethipin requires strict adherence to timing, as premature application can lead to a decrease in thousand-kernel weight and oil content.

Treatments are usually conducted during the physiological maturity phase when seed moisture reaches specific threshold values.

The application rate depends on the density of the leaf canopy and weather conditions during the planned harvest period.

Ground sprayers are used for application to ensure uniform coverage of the entire vegetative mass of the plants.

It is recommended to schedule the harvest a certain number of days after treatment, as specified in the label regulations for the specific dimethipin-based product.

Restrictions

When handling the substance, the use of personal protective equipment is mandatory to prevent contact with skin and the respiratory system.

It is necessary to strictly observe the pre-harvest intervals to avoid residue levels in the final product.

Dimethipin is sensitive to weather conditions: high humidity or low temperatures may slow down its action.

It is important to ensure the product does not drift to adjacent fields with other crops, as it may cause premature wilting.

  • Store in a cool place away from direct sunlight.
  • Avoid release into water bodies and sewage systems.
  • Dispose of empty containers in accordance with environmental regulations.
Regulatory

Status in the European Union

Not approved in the EU

CAS number
55290-64-7
Category (EU)
PG - Plant growth regulator
EU legislation

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