Influences of Certain Fungicides on Parasitism of the NematodeCriconemella xenoplaxby the FungusHirsutella rhossiliensis

Abstract

Seven fungicides commonly used in South Carolina peach orchards were tested in the laboratory and greenhouse for their effects on Hirsutella rhossiliensis, a fungal parasite of Criconemella xenoplax. Benomyl at 1, 5, and 10 μg a.i./ml completely inhibited hyphal growth of the fungus. Chlorothalonil, dicloran, iprodione, and triforine significantly suppressed hyphal growth at 20 μg a.i./ml, but captan inhibited growth only at 40 μg a.i./ml. Sulfur had no effect at the concentrations studied. Conidial germination and germ tube elongation were more sensitive to benomyl than to iprodione or triforine (...)