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- Title
The chemical control of chrysanthemum petal blight caused by Itersonilia perplexans Derx.
- Authors
SMITH, PAULINE M.
- Abstract
SUMMARY Laboratory bioassays of fungicides against Itersonilia perplexans showed that disease developed more readily on outer mature chrysanthemum petals than on immature inner florets and that inoculations on floret tips were more successful than on bases. In glasshouse trials, seven of the fungicides tested significantly decreased disease development without inducing phytotoxicity: of these, maneb and mancozeb, but not zineb, left unsightly deposits. Tank-mixed zineb was more fungitoxic, especially in continuing high humidities, but was also more phytotoxic than wettable powder and dust formulations, but this phytotoxicity could be avoided by spraying the crop at the opening bud stage and by increasing the interval between applications from 5 to 7 days.
- Publication
Annals of Applied Biology, 1966, Vol 58, Issue 3, p431
- ISSN
0003-4746
- Publication type
Article
- DOI
10.1111/j.1744-7348.1966.tb04403.x