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Descriptors for Cassava Evaluation

Descriptors Cassava Evaluation

Authors:

1. Total number of plants affected by CMD

Total number of plants affected by CMD

Data type: java.lang.Double.

2. Incidence of Cassava Mosaic Diseases

Incidence of Cassava Mosaic Diseases scored in percentage

Unit of measure, suffix: %. Data type: java.lang.Double.

3. Severity of Cassava Mosaic Disease

Severity of Cassava Mosaic Disease

Data type: java.lang.Integer.

1 - Mosaic pattern on all leaves and leaf distortion
2 - No symptom
3 - Mild chlorotic pattern and slight distortion of the leaf base
4 - Mosaic pattern on all leaves, leaf distortion and reduction in leaf sizes
5 - Twisted leaves and stunting of the whole plant

4. Total number of plants affected by CBB

Total number of plants affected by CBB

Data type: java.lang.Double.

5. Incidence of Cassava bacterial blight

Incidence of Cassava bacterial blight scored in percentages

Unit of measure, suffix: %. Data type: java.lang.Double.

6. Severity of Cassava bacterial blight

Severity of Cassava bacterial blight

Data type: java.lang.Integer.

1 - Extension and appearance of new lesions on stem and wilting of the first leaves
2 - Lesions around the point of innoculation on the stem
3 - No symptom
4 - Extensive leave wilt and defoliations
5 - Complete defoliation, stem dieback, standing and dieback of lateral roots

7. Total number of plants affected by CGM

Total number of plants affected by CGM

Data type: java.lang.Double.

8. Incidence of Cassava Green Mites

Incidence of Cassava Green Mites

Data type: java.lang.Double.

9. Severity of Cassava Green Mites

Severity of Cassava Green Mites

Data type: java.lang.Integer.

0 - 0
1 - 1
2 - 2
3 - 3
4 - 4
5 - 5

10. Poundability

Poundability of boiled tubers

Data type: java.lang.Integer.

1 - Non poundable (Non-mealy)
2 - Very poundable ( very mealy)
3 - Poundable (mealy)
4 - Slightly poundable (slightly mealy)

11. Taste of boiled root

Taste of boiled root

Data type: java.lang.Integer.

1 - Bitter
2 - Sweet
3 - Bland

12. Estimate of storage root cyanide content by picrate test

Estimate of storage root cyanide content by picrate test

Data type: java.lang.Integer.

1 - Low
2 - Very low
3 - Moderately low
4 - Negligible
5 - Moderately high
6 - Moderate
7 - High
8 - Very high
9 - Not detectable

13. Severity of Cassava Anthracnose Disease

Severity of Cassava Anthracnose Disease

Data type: java.lang.Integer.

1 - 1
2 - 2
3 - 3
4 - 4
5 - 5

14. Harvest Index

Harvest Index

Data type: java.lang.Double.

IITA Accession - ver. 2  
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