pymetrozine PESTS AND DISEASES OF UKRAINE SUNFLOWER, SAFFLOWER (oil crops) Thrips (several species) Thrips are tiny, 1-2mm, dark Use resistant cultivars. No treatment threshold found. slender insects with fringed wings. Use reflective mulches. They are seasonally transported on Maintain good plant vigor with irrigation and artisanal extracts of garlic rain/wind storms. They feed by fertilization. abamectin puncturing plant tissue and Floating row covers can exclude thrips and spinosad sucking out the cell contents. other pests. acetamiprid Nymphs and adults may damage Sanitation: Remove and dispose of old, spent the terminal buds and flowers, flowers. causing flower drop, leading to no seed development, which, under heavy infestation, can lead to yield losses of up to 100%. Gray weevil, A 5-9mm powdery light gray Use delayed planting to avoid peak egg laying. No treatment threshold found. Tanymecus weevil that feeds on seeds and leaf Use proper plant spacing so that stems are Insecticide treatments are not dilaticollis margins, reducing seed set and sufficiently thick. recommended. photosynthesis. Do frequent monitoring at bud stage, and seed- Sanitation: remove and destroy crop stalks/residues. Downy mildew, Use resistant varieties. No treatment threshold found. Plasmopara Disease in the field begins to Provide good air circulation. halstedii manifest itself in a phase of the Do crop rotation. azoxystrobin, seed second pair of leaves, but the Control weed hosts near field. typical development can be seen Avoid wetting foliage, use drip irrigation if Foliar fungicides are not later. There are five forms of possible. economical and not generally downy mildew of sunflower, used. stunting, shortened stems, upper side of leaves appear large, angular, fuzzy patches of light
pymetrozine PESTS AND DISEASES OF UKRAINE SUNFLOWER, SAFFLOWER (oil crops) Thrips (several species) Thrips are tiny, 1-2mm, dark slender insects with fringed wings. They are seasonally transported on rain/wind storms. They feed by puncturing plant tissue and sucking out the cell contents. Nymphs and adults may damage the terminal buds and flowers, causing flower drop, leading to no seed development, which, under heavy infestation, can lead to yield losses of up to 100%. Use resistant cultivars. Use reflective mulches. Maintain good plant vigor with irrigation and fertilization. Floating row covers can exclude thrips and other pests. Sanitation: Remove and dispose of old, spent flowers. No treatment threshold found. artisanal extracts of garlic abamectin spinosad acetamiprid Gray weevil, Tanymecus dilaticollis A 5-9mm powdery light gray weevil that feeds on seeds and leaf margins, reducing seed set and photosynthesis. Use delayed planting to avoid peak egg laying. Use proper plant spacing so that stems are sufficiently thick. Do frequent monitoring at bud stage, and Sanitation: remove and destroy crop stalks/residues. No treatment threshold found. Insecticide treatments are not recommended. Downy mildew, Plasmopara halstedii Disease in the field begins to manifest itself in a phase of the second pair of leaves, but the typical development can be seen later. There are five forms of downy mildew of sunflower, stunting, shortened stems, upper side of leaves appear large, angular, fuzzy patches of light Use resistant varieties. Provide good air circulation. Do crop rotation. Control weed hosts near field. Avoid wetting foliage, use drip irrigation if possible. No treatment threshold found. azoxystrobin, seed Foliar fungicides are not economical and not generally used. seed-
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