ISHS Acta Horticulturae 482: International Symposium on Cut Flowers in the Tropics
SUSCEPTIBILITY OF FIVE DENDRANTHEMA GRANDIFLORA CULTIVARS TO PHOMA SP. AND EVALUATION OF A BIOCONTROLLER |
| Authors: | L.M. Prieto, G.R. Ochoa, E. Garcés de Granada, F. Valcarcel |
| Abstract:
All of the Dendranthema grandiflora cultivars - Dark Pink Jean, Gallant, Vero, Polaris and Moda - showed symptoms 21 days after being sown, at a 142.46 g dose of Phoma sp.; Polaris was also affected by 3 to 24 g doses. Moda was the most resistant of all the cultivars. The height of the Dark Pink Jean cultivar was affected by a 9 to 24 g dose. The Gallant and Dark Pink Jean cultivar leaves resisted 3 to 12 g. The roots of Moda, Vero and Dark Pink Jean were the most rapidly affected by disease; Gallant and Polaris roots were affected by 24 g of Phoma in liquid. Plant mortality was high in this substrate because Phoma sp. helps Botrytis cinerea attack. The Trichoderma sp. isolate T7 in vitro is a more effective inhibitor of Phoma sp. than T17, T18 and T2B. | |
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