Reduction of chronic ozone injury on Poinsettia by benomyl

Plants of poinsettia (Euphorbia pulcherrima Wild.), cult Paul Mikkelsen and Mikkelwhite, were repeatedly exposed to ozone (O 3 ) at 0.10 μl/liter (10 pphm) for 8 h/day, 5 days/wk for 68 days, and compared with plants grown in ozone-free, charcoal-filtered air. Benomyl (methyl-1-(butylcarbamoyl)-2-be...

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Bibliographic Details
Published in:Canadian journal of plant science 1973-01, Vol.53 (4), p.833-835
Main Authors: Manning, W.J, Feder, W.A, Vardaro, P.M
Format: Article
Language:English
Subjects:
plant damage
plant health
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Summary:Plants of poinsettia (Euphorbia pulcherrima Wild.), cult Paul Mikkelsen and Mikkelwhite, were repeatedly exposed to ozone (O 3 ) at 0.10 μl/liter (10 pphm) for 8 h/day, 5 days/wk for 68 days, and compared with plants grown in ozone-free, charcoal-filtered air. Benomyl (methyl-1-(butylcarbamoyl)-2-benzimidazole carbamate) was applied as a soil drench to plants in both air regimes at 0, 500, or 1,000 μg/ml, 3, 30, and 57 days after initiation of the experiment. Untreated plants of both cultivars exposed to O 3 developed symptoms of chronic O 3 injury expressed as chlorosis and senescence of lower leaves, decreases in stem diam and fresh and dry weights of stems and leaves. Benomyl soil drenches, at both rates, significantly reduced incidence of chronic O 3 injury on both cultivars.
ISSN:0008-4220
1918-1833
DOI:10.4141/cjps73-162