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Essay On Sunflower

755 Words4 Pages

ABSTRACT: Sunflower is the most important oil crop. Downy mildew, caused by the fungal pathogen Plasmopara halstedii, is one of the major diseases in sunflower that can lead to significant loss of yield, to more than 50%. Breeding for resistance is considered as the most effective method for achievement of low cost and environmental friendly production. Crop rotation helps reduce populations of many important sunflower pathogens in the soil. Most sunflower diseases are caused by pathogens specific to sunflower. The primary approaches for managing diseases of sunflowers are the use of resistant varieties and crop rotation. Additionally, seeds may be treated with fungicides to control fungi that cause seedling diseases. Fungicides are labeled …show more content…

Sunflower is most common and important oil crop in Bulgaria. Sunflower is one of the several plants that are First in North America. The genus Helianthus consist of more than sixty (60) perennial and annual species. Wild sunflower is the first plant. Many diseases, pests and insect infect the cultivated sunflower plants and affect the yield of the plant. The major problem is plant diseases that how we overcome the disease and increase the ¬¬¬¬¬¬¬¬¬¬¬sunflower yield. More than 30 diseases have been identified worldwide which is due to viruses, bacteria and other microorganisms. Breeding for disease resistance is always considering most important task in sunflower plant breeding for scientist. Common Diseases and their Managements: The most common diseases of sunflower are caused by Fungus. The major disease of sunflower include Downy Mildew, powdery mildew, leaf spot, verticillium wilt, Rust, Sclerotinia head and stem root, phoma black stem, Aternaria leaf blight and leaf spot. Effective Control measures for sunflower diseases are: 1- Planting resistant Hybrids 2- A rotation of 4 years btw successive sunflower

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