| 单词 | blackarm |
| 释义 | > as lemmasblackarm blackarm n. originally U.S. a bacterial disease of cotton plants caused by the pathogen Xanthomonas malvacearum, characterized by angular black lesions on the stem and fruiting branches. 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 1902 Proc. 26th Ann. Meeting Georgia State Hort. Soc. 47 This form is sometimes known as ‘black-arm’ and sometimes does much damage to Sea Island and Egyptian cotton in South Carolina and Southern Georgia. 1931 Wellington (Texas) Leader 26 Mar. 8/1 In severe cases of black-arm, large patches of diseased tissue may completely girdle the stalks, which then break off. 1991 Biogr. Mem. Fellows Royal Soc. 37 285 R. L. Knight..had been employed..to work on the genetics of resistance to an important bacterial disease of cotton, widely known at the time as ‘blackarm’, but later referred to as bacterial blight. < as lemmas |
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