Agronomic efficiency of sunflower and spring rapeseed cultivation with the use of imidazolinone group herbicides

The article offers an assessment of the effectiveness of the Clearfield system in the technology of cultivation of spring rapeseed hybrid NIKSH 213 KLS and sunflower hybrid NK Neoma, taking into account different precursors in the Non-Chernozem zone. The study was conducted in the conditions of the economy of LLC “Flame” of the Korablinsky district of the Ryazan region, in 2021–2023. Clearfield is a universal production system currently used worldwide, which involves the use of modern high-yielding hybrids resistant to selective herbicide. A single application of herbicides of this system allows you to create a soil herbicide screen that restrains subsequent waves of weeds. The conducted studies allowed us to establish that the post-emergence use of herbicides in combination with an adhesive in oilseed crops destroyed 100% annual dicotyledonous weeds such as the common mountaineer, rough mountaineer. Cultivation of rapeseed and sunflower using Clearfield technology provided clean crops of these crops, and additional foliar treatment of plants with fertilizers created favorable conditions for additional formation of elements of the crop structure. The maximum yield of spring rapeseed over the years of research was recorded on the Lebozol-RAPSMIX variant of 21.4–24.2 c/ha (winter wheat) and 21.9-26.3           (spring wheat), the excess relative to the untreated variant was 21.7 % (+4.2 c/ha) and 25.7 % (+5.0 c/ha), respectively. On average, according to the experience with sunflower, the maximum yield was noted on variants with the effect of non-root top dressing Lebozol-expert–Opti Care – 32.5 c/ha against the background of the predecessor of winter wheat (an increase of + 3.8 c/ha), and 30.7 c/ha against the background of spring wheat (+3.3 c/ha).