Qualified Applicator License (QAL) Plant Agriculture Practice Test 2026 - Free QAL Practice Questions and Study Guide

Cercospora leaf blight in carrots is specifically caused by Cercospora carotae. This pathogen is known for its ability to affect the foliage of carrot plants, leading to characteristic symptoms such as dark, sunken lesions on leaves, which can hinder photosynthesis and overall plant health.

The other options represent different species of the Cercospora genus, but they are associated with specific diseases affecting other crops. Cercospora fructicola generally affects fruits, Cercospora beticola is known for its impact on beet plants, and Cercospora kikuchii primarily affects soybeans and is recognized for causing purple seed stain. Understanding the correct association of pathogens with their host plants is crucial for effective disease management and control strategies in agriculture.