Abstract

Two entomophthoraceous species, found at different localities in Israel, caused epizootics onHypera variabilisHerbst. larvae during spring of 1976 and 1977.Zoophthora phytonomi(Arthur) Batko, emend.Ben-Ze’ev & Kenneth (syn.Entomophthora phytonomiArthur) produced in the field only conidia, whereasConidiobolus osmodesDrechsler formed only dark, rough-walled resting spores that had been erroneously thought in the past to belong toZ. phytonomi. In culture,Z. phytonomi, isolated from conidia, produced subhyaline, smooth resting spores, whereasC. osmodes from resting spores produced rotund conidia, which proved pathogenic toH. variabilis larvae and adult houseflies. All species connected by different authors withZ. phytonomi are discussed, includingE. elateridiphaga, transferred here toZoophthora.

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