Incidence, Distribution and Characteristics of Major Tomato Leaf ...

Incidence, distribution and characteristics of major tomato leaf curl and mosaic virus diseases 138
Mean number of TYLCV-infected
plants
8.00
6.00
4.00
2.00
0.00
1 2 3 4 5 6 7
Weeks from transplanting
Figure 5.10: TYLCV progress curves for each treatment (n1-n6) ¹ in trial I, Buwama,
March to July 1999
Mean number of TYLCV-infected
plants
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
n1
n2
n3
n4
n5
n6
1 2 3 4 5 6 7 8 9
Weeks from transplanting
Figure 5.11: TYLCV progress curves for each treatment (n1-n6) ¹ in trial II, Buwama,
August to November 1999
Mean number of TYLCV-infected
plants
1.20
1.00
0.80
0.60
0.40
0.20
0.00
1 2 3 4 5 6 7 8 9
Weeks from transplanting
Figure 5.12: TYLCV progress curves for each treatment (n1-n6) ¹ in trial III, Buwama, November
1999to February 2000. ¹n1- Tomato monocrop without spraying dimethoate, as a control treatment;
n2- tomato monocrop combined with uprooting of TYLCV symptom-bearing plants; n3- tomato-bean
intercrop without spraying dimethoate; n4- tomato monocrop with dimethoate sprayed once a week;
n5- tomato monocrop with uprooting and dimethoate sprayed once a week; n6- tomato-bean intercrop
with bean rows sprayed once a week with dimethoate.
n1
n2
n3
n4
n5
n6
n1
n2
n3
n4
n5
n6