Peach Leaf Curl Disease (Taphrina deformans)

Peach Leaf Curl Disease (Taphrina deformans)

• 1.
  Peach Leaf Curl Taphrinadeformans Muhammad Ammar University college of agriculture University of sargodha
• 2.
  Hosts • Peach • Nectarine •Almond • Related ornamental species
• 3.
  • Common inunsprayed orchards. • Serious in rainy years, cause defoliation of unsprayed trees early in the growing season. • Defoliation…. Weakness…. Winter Injury
• 4.
  Symptoms • Distorted, puckeredand thickened leaves. • Reddish or purple coloration. Deformed leaves of peach
• 5.
  • Later onturn gray with a powdery appearance. • Shortly these leaves turn yellow or brown and drop.
• 6.
  • Infected fruitsdrop shortly. • Infected twigs are swollen and stunted, usually with deformed leaves at their tips.
• 7.
  Disease Cycle • Sporesfrom leaf surface washed or wind blown onto peach twigs and buds. • Lodged in bud scales or crevices in the bark throughout the summer and following winter. • Germinate during rain as the buds open in the spring.
• 8.
  • Spores producebud conidia during periods of wet, cool weather. • If no spore germination occurs at bud break, then little damage results for that year. • Spores remain inactive and little or no infection occurs during dry period.
• 9.
  Management • Sulfur orcopper-based fungicides. • Spray the entire tree after 90% defoliation in the fall. • Spray in early spring just before the buds open. • Clean the ground beneath the trees during winter months. • Prune and destroy infected plant parts as they appear. • Maintain tree health and vigor by cutting back more fruit than normal, watering regularly and applying organic fertilizer high in nitrogen.