*3.7.2 Measuring the severity of CMV infection*

A guide (**Table 2**) to the severity of the infection was made by Prof. Maadh Abdel Wahab Al-Fahad, consisting of six degrees to know the development of the apparent symptoms on the plants. It was calculated by the number of affected plants in terms of the degree of each plant [102].

Severity of infestation% ¼ ð Þ 0 � 0 grade of plants number þ … þ 5 � 5 grade of plants number *=* ð5 � examined for plants total numberÞ � 100

(3)


**Table 2.** *Disease index of severity of CMV infection, by Dr. Maadh Alfahad.*

The experiment measurements also included the following characteristics: Measuring the amount of chlorophyll, measuring the leaves area, measuring growth and outcome indicators, estimate the amount of total yield/plant, measure the plant height (cm. plant), measurement of dry weight of shoots/g, measurement of the dry weight of the root mass.
