POWDERY MILDEW

A. Small white spots of fungus mycelium are the first sign of the disease.

B. Severely diseased leaf (left), healthy leaf (right).

 

C. Development of powery mildew in leaf area where sulfur was not deposited.

F. Sugarbeet infested with Perono- spora farinosa.

       

CERCOSPORA LEAF SPOT

D. Premature death of severely diseased leaves.

E. Leaf spots caused by fungus infection.

   

BEET RUST

G. Pustules on leaf containing spores of Uromyces betae.