Roquette / Rockett

Sunflower SI Rosette CLP — this is a mid-early linoleic hybrid developed by Syngenta for cultivation using the Clearfield Plus technology, which involves the use of the herbicide Euro Lightning Plus. The hybrid exhibits high resistance to herbicides of the imidazolinone group, significantly simplifying weed control, particularly against the parasitic weed Russian thistle (biotypes A-F). Due to these characteristics, SI Rosette CLP is ideally suited for the southern steppe regions of Ukraine, where the climate is characterized by aridity and high temperatures.

The hybrid demonstrates high heat and drought resistance comparable to the Sanay MG hybrid, ensuring stable yields even under challenging climatic conditions. Plants reach a height of 140–160 cm during flowering, when they are intensively pollinated by beneficial insects. In 2016, the seed yield ranged from 27.0 to 29.5 centners per hectare, with oil content in the seeds reaching 47–49%, allowing for up to 6.1 centners per hectare of oil. The hybrid grows well on soils of varying fertility levels, though for maximum productivity, it is recommended to select high-quality soils.

SI Rosette CLP shows good adaptability to sowing dates and resistance to diseases such as frogeye leaf spot and sclerotinia, with tolerance ratings of 6 and 7 respectively. The recommended planting density varies depending on moisture levels: 35–45 thousand plants per hectare in dry conditions and 45–50 thousand under moderate moisture. These characteristics make the hybrid an attractive choice for producers aiming to achieve high-quality and stable sunflower yields in the southern steppes of Ukraine.