Seed solutions for sustainable control of downy mildew through gene resistance management.
Sunflower downy mildew is a fungal disease that can majorly impact crops, ranging from a low percentage of affected plants to over 50 percent of a field. It is caused by a fungus called Plasmopara halstedii. Symptoms appear early in the plant’s growth in the form of yellow spots on the upper side of leaves, white spots on the underside of leaves, as well as plant dwarfism and sterility of the head.
Breeding can help fight sunflower downy mildew by developing varieties that are resistant to the disease. By identifying genes involved in resistance, breeding can select sunflower varieties that are less susceptible to the disease.
Under the Mildew Master® solution, Lidea brings together sunflower hybrids adapted for cultivation in areas infested by downy mildew.
Chemical seed treatment solutions can be effective in combating sunflower downy mildew. However, experience has shown that they are not 100 per cent efficient: they can be washed away by heavy rains, and downy mildew can develop ways to mutate and bypass these solutions.
There are certainly alternative solutions to seed treatments for fighting sunflower downy mildew, and genetics is one of them. We split our hybrids according to their resistance: we only treat sunflower hybrids requiring additional protection, and we do not apply a fungicide to hybrids with the best genetic constructions. We market the latter under our Mildew Master label.
However, while genetics help to reinforce the plants’ natural resistance to the disease, contributing to combating the pathogen in the long term, it is best to apply specific farming practices to mitigate the risk. Adopting sustainable agricultural practices such as crop rotation, genetic alternation, and soil management can help prevent the appearance of sunflower downy mildew and other sunflower diseases (e.g., Verticillium, etc.).
Mildew Master® presents two segments, ESSENTIAL and PREMIUM, catering to different levels of downy mildew pressure. Each segment offers a tailored defense against varying levels of downy mildew pressure, ensuring your crops thrive with resilience and vigor.
For the correct selection and positioning of hybrids, it is necessary to consult our employees and to take into account regional characteristics.
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