Multiple choice ‘Zonate leaf spot’ disease of Alfalfa is caused by ________. Rhizoctonia leguminicola Leptosphaerulina briosiana Leptotrochila medicaginis Cercospora medicaginis Stemphylium botryosum Reveal answer Fill a bubble to check yourself E Correct answer Explanation Zonate leaf spot is caused by the fungus Stemphylium botryosum.