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Safety of Pochonia chlamydosporia var catenulata in acute oral and dermal toxicity/pathogenicity evaluations in rats and rabbits

Abstract:

The nematophagous fungus, Pochonia chlamydosporia var. catenulata (Kamyschlco ex Barron & Onions) Zare & W-Gams, wasvestigated as a potential biocontrol agent in integrated pest management strategy for Meloidogyne incognita (Kofoid and White) Chitwood in vegetable crops in Cuba. An acute oral and dermal toxicity/patogenicity study was performed to determine the safety of this fungus in non-target organisms. In the first study, a I-dose level of 5 × 108 units of the microbial pest control agent/treated rat was used. Mortality or clinical signs were not evident and no adverse effects on body weight, hematology, microbiology and gross or microscopic pathology were observed. Food and water consumption was not significantly different between control and treated groups. In the acute dermal toxicity study, there was neither mortality nor clinical signs of toxicity, and no toxic effects in gross and microscopic pathology were detected. Thus, Pochonia chlamydosporia var. catenulate (Vcc-108, IMISD 187), administered oral and dermally to rats and rabbits respectively, was safe in toxicity pathogenicity studies.