Powdery mildew of wheat is caused by:
A) Erysiphe graminis
B) Blumeria graminis
C) Puccinia graminis
D) Fusarium graminearum
The pathogen Alternaria solani causes:
A) Early blight of potato
B) Late blight of potato
C) Early blight of tomato
D) Late blight of tomato
White rust of crucifers is caused by:
A) Puccinia horiana
B) Albugo candida
C) Uromyces viciae-fabae
D) Melampsora lini
Red stripe of sugarcane is caused by:
A) Xanthomonas albilineans
B) Xanthomonas translucens
C) Acidovorax avenae subsp. avenae
D) Acidovorax facilis
Which disease is caused by a bacterium?
A) Powdery mildew
B) Fire blight
C) Rust
D) Smut
Which disease is transmitted by aphids?
A) Damping-off
B) Barley yellow dwarf virus
C) Fusarium wilt
D) Cercospora leaf spot

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