Tip Filling Rating
| 1 |
Ear is 100% filled with kernels |
| 3 |
<10% of the tip of the ear has no kernels
|
| 5 |
10-20% of the tip of the ear has no kernels |
| 7 |
21-30% of the tip of the ear has no kernels |
| 9 |
>31% of the tip of the ear has no kernels |
Vigor rating Guide
| 1 |
Very high vigor: very uniform, broad leaves and big stalk diameter |
| 3 |
High Vigor: Uniform and good stalk diameter
|
| 5 |
Medium Vigor: uniform, green, small stalk diameter
|
| 7 |
Low Vigor: more or less uniform, small stalk diameter |
| 9 |
Very Low Vigor: Not uniform, small stalk |
Vivipary
| 1 |
No sign of Vivipary |
| 3 |
With sign of coleoptiles emergence; with green coloration but without protrusion
|
| 5 |
With coleoptiles emergence; with green coloration and protrusion
|
| 7 |
Growth of coleoptiles is evident; with initial radical emergence |
| 9 |
Wilting of coleoptiles and presence of root growth |
Northern / Southern Leaf Blight
| 1 |
No infection: zero to very few lesions observed on the leaves plant |
| 3 |
Slight infection: few scattered lesions on lower leaves |
| 5 |
Moderate infection: numerous lesions on lower leaves and few on the middle leaves |
| 7 |
Severe infection: abundant lesions on the lower and middle leaves and few on the upper leaves |
| 9 |
Highly severe infection: all leaves are covered with lesions |
Corn Rust
Six matured leaves are used for assessment; 3 leaves below the ear and 3 leaves above the ear at 80-85 DAP.
| 1 |
No infection: Zero to very few rust pustules observed on leaves and leaf sheaths |
| 3 |
Slight infection: 1-5% of the total leaf area is covered with rust pustules |
| 5 |
Moderate infection: 6-25% of the total leaf area is covered with rust pustules |
| 7 |
Severe infection: 26-50% of the total leaf area is covered with rust pustules.
|
| 9 |
Highly severe infection: 51-100% of the total leaf area is covered with rust pustules |
Brown Spot (whole plant)
| 1 |
No infection: zero to very few brown spot lesions observed on leaves and leaf sheath |
| 3 |
Slight infection: brown spot scattered or banded on the 2nd and 3rd lower leaves and sheath |
| 5 |
Moderate infection: brown spot scattered on all lower leaves and sheath and few spots on upper leaves |
| 7 |
Severe infection: spots are scattered on all leaves and sheaths |
| 9 |
Highly severe infection: spots are scattered on all leaves, sheath, midribs, nodes, internodes |
Banded Leaf Sheath Blight / BLSB (Ear)
| 1 |
No infection: zero to very few lesions observed on leaves and leaf sheaths at the base of the plant |
| 3 |
Slight infection: 2-3 lower sheaths and leaves are partially covered with lesions |
| 5 |
Moderate infection: 2-3 lower sheaths and leaves are covered with lesions and the upper sheaths are partially infected |
| 7 |
Severe infection: all leaves and sheaths under the ear are covered and the husk is partially infected |
| 9 |
Highly severe infection: the ear and all the leaves below and few leaves above are covered with lesions |
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