Abstract

RESPONSE OF NITROGEN AND AMINO ACID SOURCES ON DEVELOPMENT OF FUSARIUM OXYSPORUM CAUSING ROOT ROT OF SOYBEAN

Khade S. K. and Jamadar A. M.

Abstract

During sample collection in Maharashtra, it was observed that soybean (Glycine max L.) roots infected by Fusarium oxysporum, were found to be dominant among the diseased samples. From these samples wild sensitive (Fo-5) and highly resistant (Fo-15) isolates were identified using fungicide roko. The aim of present investigation was to evaluate nitrogen and amino acid sources on disease development of soybean caused by Fusarium oxysporum. The sensitive and resistant isolates of Fusarium oxysporum, when grown on Czapek Dox agar medium show different response to nitrogen, and amino acid sources on development of disease on soybean. Different nitrogen sources like Sodium nitrate, ammonium nitrate, potassium nitrate and calcium nitrate were evaluated for growth response which showed variation in results. Four amino acid sources namely, Proline, Serine, Histidine and Phenyl alanine were used in this study. There was variation in the growth of the sensitive and resistant isolates on different amino acids. All these amino acids show different action on the growth of sensitive and resistant isolates. There was significant variation, in the growth of development of pathogen. Fusarium oxysporum, casing root of soybean, either stimulant or inhibitory, when nitrogen and amino acid sources used.

Keywords: Soybean, Fusarium oxysporum, root rot, nitrogen and amino acid sources.