Field evaluation of fungicides for the control of chrysanthemum flower blight

Abstract

Seventeeen fungicidal spray treatments were evaluated in the field to determine their efficiency in c~ntrolling flower b~ight. of chrysanth<:ll,1ums. The fungi in the disease complex were Alternarza alternata, Botrytls cmerea, Itersomlla perplexans, Mycosphaerella ligulicola, and Stemphylium vesicarium. Appreciable disease control was obtained with all the fungicides tested. chlorothalonil being the most satisfactory individual chemical; mancozeb ilnd captafol also gave reasonable control. Combinations of two fungicides did not offer any major advantage.

An Overview on Fungal Diseases in Angiospermic Plants

“…The various fungicidal treatments were applied to identify the symptoms of diseases and prevent the plants from the disorders. These chemical fungicides control the spore germination and kill the germinated spores that act as protectants of the flowering plants [23].…”

Multiple Fungicide Resistance in Botrytis: A Growing Problem in German Soft-Fruit Production

“…In general terms, broad-spectrum fungicides such as tolylfluanid, chlorothalonil, folpet or thiram possess a lesser efficacy against B. cinerea than single-site fungicides (Gullino et al, 1989;Singh & Milne, 1974;, but they are also less susceptible to resistance development (Leroux, 2007). Future experiments should focus on examining their impact on the development of resistance against the current single-site fungicides when applied as tank mixtures.…”

Host Range of Itersonilia perplexans and Management of Itersonilia Petal Blight of China Aster

“…Growth, sporulation, and infection processes of I. perplexans are favored by abundant rainfall, high relative humidity (> 70%), and cool temperatures (10 to 15°C) (5,12,14). Itersonilia has been detected in Australia, Austria, Canada, Great Britain, Greece, Japan, New Zealand, Netherlands, Portugal, Uruguay, and the United States (2,3,10,13,21,23,25). It causes flower blight in anemone, dahlia, florists' chrysanthemum, and globe artichoke, and various other symptoms including seedling blight, leaf spots/necrosis, and/or root cankers in dill, edible burdock, parsnip, and sunflower (2,4,7,9,11,13,18,20,21,25,26).…”