Efficacy of azoxystrobin and other strobilurins against Fusarium wilts of carnation, cyclamen and Paris daisy
Gullino. M. L Minuto. A Gilardi. G Garibaldi. A
Crop Protection ; 2002 [Vol.21] Pages:57-61
Abstract
The strobilurins, azoxystrobin, kresoxym-methyl and trifloxystrobin, were tested in experimental trials carried out in the growth chamber or glasshouse against Fusarium wilts of carnation (Fusarium oxysporum f. sp. dianthi), cyclamen (F. oxysporum f. sp. cyclaminis) and Paris daisy (Fusarium oxysporum f. sp. chrysanthemi), in comparison with benomyl and in some experiments prochloraz. The three strobilurins controlled Fusarium wilt on carnation when applied at transplant at 1–2 g/m2 as soil drenching. Azoxystrobin, at 250 mg/l of medium controlled also Fusarium wilt on cyclamen and on Paris daisy. Kresoxim methyl at 250 mg/l controlled Fusarium wilt on cyclamen but it was phytotoxic; at the same dosage it was not effective on Paris daisy. Trifloxystrobin was only partially or not effective in controlling Fusarium wilt on cyclamen and Paris daisy. Particularly kresoxim-methyl caused chlorosis and plant stunting. This study shows the high efficacy of azoxystrobin against Fusarium wilts of three important ornamental crops. Azoxystrobin provided control similar or better to those shown by benomyl, applied at higher dosages in all trials.
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