Guidelines for the Application of Imidazolinone Herbicides in Winter Canola Cultivation

Herbicides of the imidazolinone group (Nopasaran (metazachlor (375 g/l) + imazamox (25 g/l)) are systemic herbicides. The active ingredients of the herbicide for rapeseed penetrate the weeds both through shoots and leaves and through the root system from the soil. Then they are transported through the phloem and xylem to the growth points (systemically), where they disrupt the process of amino acid synthesis, causing the death of weeds. The effectiveness, duration and spectrum of the herbicide are fully sufficient to reliably protect rapeseed crops from weeds throughout the growing season.

Rapeseed Technological solutions Advices to the agronomist
Published by: 11.06.2018

The advantage of winter rape cultivation technology with the use of imidazolinone herbicides:

  • increase in yield (due to high level of efficiency against all annual and cereal weeds);
  • Improved crop quality (control of weeds that affect the glucosinolate content and are a source of impurities during harvesting);
  • the presence of two active ingredients of different chemical classes guarantees effective control of crop purity.

Important elements of the technology of using herbicides of the imidazolinone group:


CropConsumption rate, l/haObjects against which treatments are performedMethod and time of treatment*

Winter rape

IMI hybrids:

Blackstone

Parker

Hrim

1,2 – 1,5 + surfactantAnnual dicotyledonous and cereal weedsSpraying seedlings in the phase of 1 - 3 pairs of true leaves of the crop

*We recommend following the application schedule specified by the herbicide manufacturer

The developmental stage of the cultivated plant is recommended for herbicide application:

The phase from 2 to 6 true leaves in cultivated plants is safe for the use of the drug.

However, the most favorable stage of rapeseed development for the application of imidazoline herbicide is 2-4 true leaves:

  • due to greater soil moisture at this time, which ensures the realization of the soil effect of the drug;
  • due to the greater sensitivity of weeds in the early stages of their development.

The weed growth stage is recommended for the effective action of the herbicide:

The maximum effectiveness of the drug is observed during active growth and development of weeds:

  • annual dicotyledons - from cotyledon to the stage of 4 true leaves;
  • annual cereals - 2-3 true leaf stage;
  • ragweed - from the cotyledon to the stage of 2 true leaves.

Recommended method of application of the herbicide for rapeseed:

  • Only by ground application. Application by air is not registered and is not recommended.
  • Avoid overlapping of application lanes during treatments.

Working fluid consumption:

200-350 liters per hectare. The sprayer must be adjusted for uniform application.

It is important to pay attention!

Most agricultural crops, including conventional rapeseed varieties and hybrids, are highly sensitive to herbicides containing imidazolinones. Application of the product on these crops can cause severe suppression or complete death. To avoid damage to other crops due to herbicide residues in the sprayer, thoroughly rinse the tank and all units after treatment.