<ul><li style="text-align:justify;">Sowing: 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 (optimum temperature is 8°C at 5 cm depth). Germination must take place quickly after sowing and within 10 days to avoid attacks by pests (wireworms, slugs, tanymecus, etc.). The cold resistance of sunflower varies according to the stage of development: - Cotyledon stage: down to -5°C. - From one-leaf stage: 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. This root characteristic gives the plant strong capacity to exploit water, nitrogen and mineral elements, even in extreme situations. For this reason, sunflower is very demanding in terms of soil structure: deep compaction can be a problem for a good establishment. This can lead to a drop in the leaf area index, increased sensitivity to water stress and grain filling defects (low thousand kernel weight). Seedbed quality is also essential to achieve homogeneous emergence. To prepare the seedbed: - Favour non-powered tine tools. - Work the soil under optimum 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 one month before the real sowing. It is recommended to apply herbicide at post-sowing or pre-emergence stage.</li></ul>For more information, 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

Solutions during the post emergence stage (2- to 8-leaf stage). (Not including the cotyledons, which 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.For more information, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

SUNFLOWER LEAF DEVELOPMENT

LEAF DEVELOPMENT

<ul><li style="text-align:justify;">Trace-elements (boron, etc.): 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 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 cases of high potential and in soils with low mineralisation.</li></ul>Nitrogen requirements are between the 5 pairs of leaves stage and the start of flowering:- Applying it too early (before 8 leaves) causes excessive vegetative development, which is unfavorable in water stress situations and can accentuate the development of phomopsis.- &nbsp;Applying too much can lead to a drop in oil content, a risk of lodging and an increase in diseases (sclerotinia, botrytis, etc.).- Nitrogen fertilisation has no effect on oleic acid content.<ul><li style="text-align:justify;">Fungicide control: it is possible to plan fungicide treatments to protect the crop against certain diseases (phomopsis, phoma, etc.).</li></ul>For more information, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

SUNFLOWER FLOWER BUD STAGE

FLOWER BUD 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 pollinator 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 up to 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;For more information, 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 for 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;">Optimum humidity: the moisture content of the seeds is between 8-11%.</li></ul>For more information, download our sunflower brochure: <a target="_blank" rel="noopener noreferrer" href="https://lidea.eu.wizyvision.app/domains/3?fid=12993">click here</a>

HOW TO GROW SUNFLOWER?

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HOW TO GROW SUNFLOWER?

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