Infection Ability of Watermolds in Some Temperate Fishes of Himalaya, India

Abstract

Summary: Infection ability tests of four species of the Saprolegniales viz., Brevileg‐nia subclavata Couch, Geolegnia inflata Coker & Braxton, Protoachlya oryzae Khulbe and Scoliolegnia centrica Khulbe were made by artificial inoculation experiments. Except Geolegnia inflata, all the three species parasitized the test fishes (Ca‐rassius auratus L., Puntius conchonius Ham., P. ticto Ham. and Nemacheilus rupi‐cola). Two chemicals, namely boric acid and potassium permanganate were effective at 0.1 to 0.15 M concentrations against parasitic watermolds. Zusammenfassung: Vier Arten der Saprolegniales, Brevilegnia subclavata Couch, Geolegnia infata Coker & Braxton, Protoachlya oryzae Khulbe und Scoliolegnia centrica Khulbe wurden in experimentellen Inokulationsexperimenten auf ihre Infektionsfahigkeit für Fische geprüft. Außer Geolegnia inflata befielen die übrigen drei Pilzarten die Testfische Carassius auratus L., Puntius conchonius Ham, P. ticto Ham und Nemacheilus rupicola. Zwei Chemika‐lien, Borsäure und Kaliumpermanganat, waren in Konzentrationen von 0,1–0,15 M gegen die parasitischen Wasserschimmel wirksam.

Pathogenicity and oxidative stress in Nile tilapia caused by Aphanomyces laevis and Phoma herbarum isolated from farmed fish

“…Our results agree with Khulbe (1989) (Sati 1981). The parasitic ability of each isolate was confirmed by artificial inoculation experiments under laboratory conditions; however, Sati (1981) found that the species of Saprolegnia and Achlya were more virulent fish parasites than those of Aphanomyces, Dictyuchus, Protoachlya, Pythium and Thraustotheca.…”