Postharvest fungicide treatment of Rose flowers for the control of Gray Mold
1990
Elad, Y. | Kirshner, B. (Ministry of Agriculture, Beit Dagan (Israel). Agricultural Research Organization, Dept. of Plant Pathology)
The latent nature of infection in rose petals by Botrytis cinerea poses difficulties in the control of gray mold disease of flowers. The fungicides vinclozolin, iprodione, metomeclan, thiram, thiram + vinclozolin or iprodione, CGA--142705, copper complex (phyton), cop per, ployoxin B, polyoxin D, dichlofluanid, fenetrazole, dichloflu anid + fenetrazole, fenthanil, clorothalonil, prochloraz, diethofen carb + carbendazim, fluazinom, diphenylamine, captan, triazine, 8- hydroxyquinolin and folpet were tested at various doses by spray or by stem dip. Most fungicides reduced disease severity by 30-55% in some of the experiments. Due to the varied severities of natural infection , data from the controls were variable. Phyton, 8 hydro xyquinolin, folpet and chlorothalonil were the least effective. Phy ton, polyoxin D and diethofencarb + carbendazim reduced gray mold when applied in the dip water of flower stems. Resistance to fungi cides, damage to flowers, and residues on the flowers may reduce the esthetic appeal of the flowers. Some of the fungicides are for experimental purposes only and are not available for commercial use in agriculture.
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