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

Which of the following definitions best describes 'Pratylenchus thornei damage'?

A. The plant damage caused by root-lesion nematode, Pratylenchus thornei.
B. the concept in the plants caused by the agent Blumeria graminis (Erysiphe graminis) f. sp. tritici.
C. the concept in the spikes caused by the agent Magnaporthe grisea (Pyricularia oryzae). Symptoms: It can infect all above-ground parts of the wheat plant, but head blast, resembling Fusarium head blight in appearance, is the most common symptom in the field. Infected spikes become bleached and produce small shriveled seed or none at all.
D. the concept in the plants caused by the agent Xanthomonas translucens. The disease, called black chaff when on the glumes.

Answer: The plant damage caused by root-lesion nematode, Pratylenchus thornei.