Table 5. Yield components in several groups of palms Elaeis guineensis healthy and affected by Crown Disease / Common Spear Rot.

Trial A Trial B
Months after field planting Group* Kg /plant (accumu
lated)		 Bunches
 /plant (accumu
lated)		 Mean bunch weight Group Kg /plant (accumu
lated)		 Bunches
 /plant (accumu
lated)		 Mean bunch weight

18

 A (42) 0.00 0.00 0.00
B (29) 0.03 0.03
C (100) 0.11 0.06 1.88
D (75) 0.22 0.13 1.75

24

 A (42) 2.54 0.90 3.34 A (80) 1.19 0.49 2.82
B (29) 7.36 1.83 4.35 B (34) 2.80 0.88 4.24
C (100) 8.58 2.53 3.85 C (49) 1.56 0.61 3.56
D (77) 6.07 2.06 3.48
DMS 6.03 1.16 0.89 N.S. N.S. N.S.

30

 A (42) 51.13 11.33 5.34 A (80) 42.4 9.44 4.70
B (29) 81.57 14.45 6.11 B (34) 62.66 11.50 5.88
C (100) 77.95 14.54 6.28 C (49) 57.26 11.14 5.43
D (88) 68.99 14.52 5.57
DMS 17.86 3.19 N.S. 14.86 N.S. 0.77

38

 A (42) 121.28 25.24 5.16 A (80) 105.90 21.97 5.39
B (29) 141.73 25.03 6.45 B (34) 121.30 22.47 5.50
C (100) 152.53 27.62 5.46 C (49) 133.69 25.37 5.97
D (75) 142.77 28.82 4.57
DMS 31.25 3.58 N.S. 27.79 3.39 N.S.

A = Plants with symptoms at the nursery and on the field

B = Symptoms at the nursery but healthy on the field

C = Allways healthy

D = Healthy at the nursery but symptoms on the field

Number in parenthesis means the number of plants / category / date

DMS = Leaf significant difference (P=0.05)