Yellow or brown shading, white patches, indistinct or irregular markings, "sooty" coloring on the lower legs and light circles around the eyes are undesirable.
黄色、棕色阴影，白色斑块，模糊或不规则的斑纹，腿下部有“烟灰色”或眼睛有浅色环绕都不理想。
2
The CPT concentration in leaves of seedlings under shading with yellow film is slightly higher than the normal, but it doesn't correlate with the treatment of time.