Cotton Genomics and Genetics 2015, Vol.6, No.1, 1-6
7
Table 5 Rating scale for cotton leaf curl virus disease (CLCuD) symptoms
Symptoms
Disease rating
Disease index (%)
Disease reaction
No Symptom
0
0
Immune
Thickening of only secondary and tertiary vains
1
0.1~10
Highly tolerant
Thickening of tertiary veins, secondary and primary
veins
2
10~30
Tolerant
Vein thickening, leaf curl or enation or both
3
30~50
Susceptible
Stunting alone with, vein thickening leaf curl/enation
4
>50
Highly susceptible
Note: (Sum of all disease ratings/total # of plants) ×25
Acknowledgements
This material is based upon work supported by the USDA
Research Service under agreement No. 58-6402-178F. Any
opinion, findings, conclusions or recommendations expressed
in this publication are those of author(s) and do not necessarily
reflect the views of USDA
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