Task: Class Definition Understanding (ontology: Food_Agriculture/Crop_Ontology)

Which of the following definitions best describes 'Stewarts wilt incidence'?

A. Stewart wilt (Erwinia stewartii) incidence.
B. Gray leaf spot (Cercospora zeae-maydis) severity.
C. Sugarcane downy mildew (Peronosclerospora sacchari) incidence.
D. Polysora rust (in lowlands Puccinia polysora) severity.

Answer: Stewart wilt (Erwinia stewartii) incidence.