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Chapter 1,573

Effect of disease onset and severity of Stewart's and Goss' wilt on sweet corn

Suparyono ; Pataky, J.K.

Phytopathology 76(10): 1079

1986


ISSN/ISBN: 0031-949X
Accession: 001572436

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Plant height (H) and number of marketable ears (MEs) were severely affected by Erwinia stewartii (E) and Corynebacterium michiganense pv. nebraskense [Clavibacter michiganensis subsp. nebraskensis] (C) when plants were inoculated at the 3-5 leaf stage. When Jubilee (susceptible), Gold Cup (intermediate) and Miracle (resistant) were inoculated with E, disease severity (DS) was 72, 31 and 25%, respectively, H was reduced by 19, 7 and 1%, respectively, and MEs were reduced by 34, 4 and 4%, respectively; when these varieties were inoculated with C, DS was 63, 46 and 23%, respectively, H was reduced by 17, 8 and 5%, respectively, and MEs were reduced by 25, 8 and 0%, respectively. DS, H and MEs were affected slightly in Gold Cup and Miracle when plants were inoculated at the 5-7 and 8-10 leaf stages. MEs from Jubilee decreased by 16 and 14% when inoculated with E and by 5 and 0% when inoculated with C at the 5-7 and 8-10 leaf stages, respectively.

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