Ecology, Environment and Conservation Paper

IN VITRO STUDIES ON BIO EFFICACY OF PAECILOMYCES LILACINUS AGAINST MELOIDOGYNE INCOGNITA INFECTING TOMATO*

Anusha, B.G., Shripad Kulkarni and Shamarao Jagirdhar

Abstract

Culture filtrates of Paecilomyces lilacinus showed toxic effect against M. incognita at varying degrees. Percentage mortality and hatching inhibition of M. incognita were directly proportional to the concentration of culture filtrates and exposure period to each filtrate. Rate of mortality was low in the first 24 h but it appreciably increased with the increase in exposure period. Similarly, different concentration of fungal filtrates of P. lilacinus was hatch inhibitory to a varying degree. P. lilacinus was found to be more effective in both mortality and hatching inhibition compared with other treatment. The results indicated that egg hatching inhibition of M. incognita increased with increased concentration of P. lilacinus. There was significant difference among all the treatments and the maximum egg hatching inhibition was observed with P. lilacinus @ 6g/L, i.e. (78.58 %) over the control followed by Paecilomyces lilacinus @ 4g/L, i.e. (73.17%) (There was a relative decrease in the larval emergence with the corresponding increase in the concentration of culture filtrates. There was significant difference among all the treatments and the maximum juvenile mortality was observed with P. lilacinus @ 6 g/L, i.e. (67.76 %) followed by P. lilacinus @ 4 g/L, i.e. (52.00%).