1. Citrus Fungal Diseases

2. Citrus Gumosis

3. Citrus Gumosis

5. Phytophthora Fruit Rot( Brown rot )

6. Pleospora rot Splits and black rot Alternaria rot

7. Botrytis blossom blight and ridging of fruit

8. Citrus
Nematode Disease

9. Tylenchulus semipenetrans

10. Tylenchulus semipenetrans

11. Tylenchulus semipenetrans

12. Citrus Bacterial & Fastidious Diseases

13. Citrus Blast and a more virulent Black Pit organism

14. Canker pustules, caused by Xanthomonas axonopodis pv
Canker pustules, caused by Xanthomonas axonopodis pv. citri,strain A on the underside of a grapefruit leaf

15. Canker on a grapefruit ,strain A (Valencia orange&Satsuma mandarins are more resistant ,),

16. Various chlorotic patterns on leaves of sweet orange trees affected by stubborn

17. Small , lopsided sweet oranges from a stubborn – affected tree ( left and center ) and a normal fruit ( right )

18. Severe stunting of a sweet orange tree due to infection with stubborn while the tree was young

19. Lime Witch’s Broom (Phytoplasma aurantifolia ,cand) Roodan , Bandar Abbas

20. Lime Witch’s Broom ( Mexican lime ) Roodan , Bandar Abbas

21. Lime Witch’s Broom ( Mexican lime ) Roodan , Bandar Abbas

22. Citrus Virus Diseases

23. Psorosis bark symptoms(vector:Aphid!!!)

24. Citrus sinensis tree in Argentina infected with "naturally spread" psorosis. Bark scaling typically associated with citrus ringspot and some forms of psorosis.

25. Concave Gum

26. Oak-leaf pattern of concave Common flecking type gum disease of psorosis

27. Tristeza , Thomson navel and unshiu on sour orange , Mahdasht , Sari , Mazandaran

28. Tristeza destruction of trees on sour orange rootstock
• South America – approx. 40 million killed
since 1930 (BCA)
• Spain – 45 million since 1960 (No BCA)
• Florida – 3 million in
• Total worldwide – over 100 million
• Italy – 98% on sour – decline widespread
(No BCA)
• 200 million to go? (TX, Mex., Med.)

31. Tatterleaf

32. Major Citrus Virus & Virus-like Agents/Vectors
• Tristeza Quick decline; stem pitting - Citrus tristeza virus /Aphids
• Huanglongbing (Greening) - Liberibacter spp./ Psylla
• Psorosis/Scaly bark- Citrus psorosis virus/ Fungus?
• Stubborn - Spiroplasma citri / Leafhoppers
• Leprosis -Citrus leprosis virus / Mites
• Variegated chlorosis- Xylella fastidiosa / Sharpshooters
• Witches’ broom of lime - Phytoplasma / Leafhopper
• Blight – cause / vector unknown
• Exocortis - Citrus exocortis viroid / Mechanical
• Cachexia - Hop stunt viroid / Mechanical
• Tatterleaf – Citrus tatterleaf virus / Mechanical

33. Other Virus & Virus-like Diseases
• Concave gum, Cristacortis, Impietratura
• Infectious variegation, Leaf rugose
• Vein enation/Woody gall (Aphids)
• Satsuma dwarf, Citrus mosaic (soil vector?)
• Citrus yellow mosaic (Mealy bugs)
• Dweet mottle (= Citrus leaf blotch?)
• Rubbery wood
• Multiple sprouting
• Measles
• Chlorotic dwarf (Whitefly)
• Indian ringspots + other ringspot diseases
• Concentric ring blotch/Zonate chlorosis (mites)
• Gum pocket, gummy bark, Kassala
• Corky vein
• Yellow vein clearing/ Yellow mottle
• Australian decline (leafhopper?)
• Sudden death –NEW – SERIOUS (aphids?) Etc.

34. Tristeza , Thomson navel on sour orange , Mahdasht , Sari , Mazandaran

35. Early symptoms of Tristeza

36. Tristeza , Honey combing , Mahdasht orchards , Sari , Mazandaran

37. Vein clearing in a Mexican lime leaf in response to tristeza infection

38. Melon aphid (Aphis gossypii) on critrus leaves ,Sari ;Mazandaran

39. Control of Tristeza Epidemy in North of Iran

40. Control of Tristeza Epidemy in North of Iran

41. Citrus Viroid Diseases

42. Gum pockets in the inner bark and pits in exposed wood of an alemow rootstook infected with cachexia

43. The figure shows severe gumming in the bark and wood of parson’s special mandarin as a rootstock under a grapefruit scion infected with a severe strain of the CACHEXIA VIROID(300nt)

44. Exocortis , Clementine on Poncirus , Behshahr , Mazandaran

45. Citrus Physiological Disorders

46. Mangenese deficiency Mangenese excess Magnesium defficiency

47. General starvation Iron deficiency Zinc deficiency

48. Boron exess Boron deficiency