| 单词 | pear blight |
| 释义 | > as lemmaspear blight pear blight n. (a) either of two destructive diseases of pear trees, one caused by a bacterium, Erwinia amylovora, which turns the leaves rapidly brown (also called fire-blight), and the other caused by any of several beetles which bore into the bark; (b) a beetle which causes the latter (see pear blight beetle n.). ΘΚΠ the world > plants > disease or injury > [noun] > type of disease > bacterial diseases > associated with food or crop plants fire blight1742 apple blight1835 pear blight1854 leaf scald1870 ring rot1875 angular leaf spot1896 blackarm1902 Moko1913 halo blight1920 1854 E. Emmons Agric. N.Y. V. 165 Atmospheric Blight..proves itself to be independent of the cause that sometimes produces the pear blight. 1881 E. A. Ormerod Man. Injurious Insects (1890) 330 In America this species of beetle,..known..under the name of Xyleborus pyri, popularly as the ‘Pear Blight’ is..injurious both to Pear and Apple. 1961 A. Schoenfeld tr. C. Stapp Bacterial Plant Pathogens ii. 134 This disease, variously called ‘fire blight’, ‘blossom blight’, ‘fruit blight’, ‘twig blight’, ‘apple blight’, or ‘pear blight’, according to the place affected, is one of the most dangerous and dreaded tree diseases of North America. 2003 Sacramento Bee (Nexis) 6 June g1 They lost half their pear crop when pear blight swept across the county in the early 1960s. < as lemmas |
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