TABLE 52 Citrus species and varieties affected by infectious diseases in the Sudan

Species and varieties on sour orange rootstock unless otherwise stated Gummy bark Cachexia Bark gumming (Kassala disease) Psorosis young leaf symptoms Concave gum-Blind pocket Scaly bark psorosis Pop-corn Exocortis Stubborn Phytophthora gummosis Rio Grande gummosis
Sweet orange var.
Atbara                   (1)  
Balady (1)(3)     (1) (1)(3) (1) (1)   (1) (1)(3) (1)
Gebeit (1)           (1)        
Navel (3)       (1)(3)         (3)  
Nouri (Jaffa) (3)                    
Sinhari         (1)            
Succari         (1)            
Valencia                      
Valencia on sweet lime   (1)1             (1)    
Mandarin var.
Balady (Willowleaf)   (1)(3)     (1) (1)         (1)
Yussef Effendi   (2)                  
Grapefruit var.
Foster pink     (3) (1) (1) (1)     (1)(3) (3) (1)(3)
Foster pink on:                      
- C. macrophylla   (2)1                  
- Rangpur lime   (2)1           (2)1      
- Carrizo citrange               (3)1      
- Savage citrange               (3)1      
Marsh seedless     (3)           (1)   (1)(3)
White marsh on citron               (1)1      
Duncan                     (1)
Pomelo         (1)(3)       (1)   (1)
Balady lime                   (1)(3) (1)

Key:
(1) The disease was seen by Childs, 1964.
(2) The disease was seen by Krezdorn, 1983.
(3) The disease was seen by Bové, 1986.

Note:
1 Symptoms were seen on the rootstock.

TABLE 53 Average maximum and minimum daily temperature (°C)

Location (alt. in m)  

Month

J

F

M

A

M

J

J

A

S

O

N

D
Addis Ababa (2400) Max.T 26 27 27 28 28 21 25 24 24 26 25 25
Min.T 3 5 7 7 7 8 8 8 7 5 3 3
Asmara (2340) Max.T 24 24 24 26 26 26 27 23 23 22 22 22
Min.T 10 11 12 13 13 13 14 13 13 11 10 8
Atbara (346) Max.T 31 32 36 39 42 43 41 39 41 39 35 32
Min.T 14 15 18 21 25 27 27 26 26 24 19 16
Dongola (375) Max.T 28 29 34 39 42 43 42 42 41 39 33 29
Min.T 9 10 14 18 23 24 25 26 25 21 15 11
El Fasher (730) Max.T 32 33 36 38 39 39 36 33 36 37 34 32
Min.T 10 12 14 18 21 22 22 21 20 18 13 10
Juba Max.T 37 38 37 36 33 33 31 31 33 34 36 37
Min.T 20 22 22 22 22 21 20 20 20 20 20 20
Kassala (529) Max.T 35 36 39 41 42 40 36 34 36 19 38 35
Min.T 16 16 19 22 25 25 23 23 23 23 21 17
Khartoum (378) Max.T 32 34 38 41 42 41 38 37 39 40 36 33
Min.T 16 16 19 22 25 26 25 24 25 24 20 17
Nairobi (1661) Max.T 25 26 25 24 22 21 21 21 24 24 23 23
Min.T 12 13 14 14 13 12 11 11 11 13 13 13