<ul><li style="text-align:justify;">Sowing: the sowing depth must be adapted to the water status of the soil: - fresh seedbed: 2-3 cm - dry soil on the surface: 3-4 cm (4-5 cm for non-sloping soils).</li><li style="text-align:justify;">Weather conditions: early sowing generally avoids early water stress at the flowerbud stage. Vegetation zero is around 6°C. The minimum soil temperature for germination is 4°C (the optimum temperature being 8°C at 5 cm depth). Germination must take place quickly after sowing and within 10 days later to avoid attacks by pests (wireworms, slugs, tanymecus,... ). The cold resistance of sunflower varies according to the stage of development: - Cotyledon stage: down to -5°C. - From one leaf: down to 0°C with necrosis on the leaf but without causing the death of the plant.</li><li style="text-align:justify;">Soil: the taproot can reach a depth of 3m deep. This root particularity gives the plant great capacity to exploit water, nitrogen and mineral elements even in extreme situations. This is why the sunflower crop is very demanding in terms of structuring of the ground: a deep compaction could be an issue for a good implantation. These accidents can lead to a drop in the leaf area index, increased sensitivity to water stress and grain filling defects (low thousandkernel weight)... Seedbed quality is also essential to achieve homogeneous emergence. To prepare the seedbed: - Give preference to favour non-powered tine tools. - Work the soil in optimal drying conditions and limit the use of tools. &nbsp;</li><li style="text-align:justify;">Weed control: the false sowing technique can be an option but at least 1 month before the real sowing. It is recommended to apply herbicide at post-sowing or pre-emergence stage.</li></ul>To know deeper, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

Sowing, tips for good development

During the post emergence solutions (2 to 8 leaves stage). Don’t count the cotyledons, they are not leaves.<ul><li style="text-align:justify;">Catch-up weed control: only for HTV (herbicide tolerant varieties). It is recommended to use technologies with specialty herbicides based on EXPRESS™ Herbicides or PULSAR® / PULSAR® PLUS*.</li></ul>Depending on applicable legislation.To know deeper, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

SUNFLOWER LEAVES DEVELOPMENT

LEAVES DEVELOPMENT

<ul><li style="text-align:justify;">Trace-elements (boron,...): 80% of needs are between the 5 pairs of leaves and flower bud stages. The contribution makes it possible to increase yield by up to 10 quintals and to increase oil content by 5 points.</li><li style="text-align:justify;">Nitrogen fertilization: sunflower is a plant that does not require much nitrogen. It is therefore possible not to use it in deep soils in the absence of winter leaching. In other situations, 60 units are sufficient to cover the needs of the crop, 80 units in the case of high potential and in soils with low mineralization.</li></ul> &nbsp; &nbsp; &nbsp; Nitrogen requirements are between the 5 pairs of leaves stage and the start of flowering:&nbsp;- Applying it too early (before 8 leaves) causes excessive vegetative development that it is not favorable in water stress situations and could accentuate the development of phomopsis.- &nbsp;Applying it too much could result to a drop in oil content, risk of lodging and an increase in diseases (sclerotinia, botrytis,...).- No effect of nitrogen fertilization on High Oleic acid content.<ul><li style="text-align:justify;">Fungicide control: it is possible to plan fungicidal interventions to protect the crop face to some diseases (phomopsis, phoma,...).</li></ul>To know deeper, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

SUNFLOWER FLOWERBUD STAGE

FLOWERBUD STAGE

<h2>Did you know that pollination improves yield and increases oil content?</h2> • The pollination of sunflowers is approximately 30 % dependent on the action of pollinators insects. • Promoting pollination in the field can increase yield (up to 2 quintals per hectare) and oil content.<img class="image_resized image-style-align-left" style="width:28.82%;" src="https://api-com.lidea-seeds.com/uploads/2022/06/helene.png" alt="lidea technical manager for sunflower">DID YOU KNOW ?In seed production, germinative capacity of sunflower seeds can increase by 10 points depending on genetics thanks to pollinators. That is why, Lidea recommends 2 to 3 hives per hectare of sunflower to “boost” pollination.&nbsp;To know deeper, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

SUNFLOWER FLOWERING

FLOWERING

Identify the right stage of harvest to avoid the risk of losses by bird damage, shattering, lodging, arrival of late diseases or seed rot.<ul><li style="text-align:justify;">Maturity: the flower head is yellow and turns brown. The stem is light beige. The leaves of the base and the middle part are dry. There are a few green leaves left above.</li><li style="text-align:justify;">Optimal humidity: the water content of the seeds is between 8 to 11%.</li></ul>To know deeper, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

SUnflower Maturity and harvest

MATURITY AND HARVEST

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