| 释义 |
dutch elm disease
noun
Usage: usually capitalized D
: a vascular disease of elms caused by a fungus (Ceratostomella ulmi) which is transmitted by bark beetles (genera Scolytus and Hylurgopinus) and which produces destructive toxic substances that are largely responsible for wilting and yellowing of the foliage, defoliation, and death first of local areas then of the entire plant |