Sweetpotato scurf (260)
Pacific Pests, Pathogens and Weeds
- Worldwide distribution. On sweepotato and wild Ipomoea (morning glory). The disease lowers quality, not yield of storage roots.
- Grey fungal spots and patches (purplish-black on orange-fleshed types), merging, but superficial over storage roots. Spots on stems and leaves.
- Disease more in wet soils with high organic matter.
- Spread occurs on infected cuttings.
- Cultural control: 2-3-year crop rotation; weed; disease-free cuttings; land free from the fungus; do not add organic manures to soil where scurf occurs; collect and burn trash after harvest.
- Chemical control: none recommended.
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