Japanese Journal of Phytopathology
Online ISSN : 1882-0484
Print ISSN : 0031-9473
ISSN-L : 0031-9473
Effects of High Concentrations of a Hydroponic Cultural Solution on the Motility of Pythium butleri Zoospores and the Occurrence of Spinach Damping-off
Shinichi KUSAKARIYutaka TANAKA
Author information
JOURNALS FREE ACCESS

1986 Volume 52 Issue 1 Pages 1-7

Details
Abstract

In hydroponics, the damping-off of spinach seedling by Pythium butleri was remarkably suppressed by highly concertrated nutrient solution (2-fold or 3-fold of standard solution). Zoospores of P. butleri encysted within a few minutes in highly concentrated nutrient solution, and they could not attach to the root surface of spinach. The zoospore encystment also occurred in the solutions of 0.02M each of calcium nitrate and calcium chloride, 0.05M of magnesium sulphate. and 0.2M each of mannitol, glucose and sucrose. These results indicated that the suppression of the damping-off in high concentration of nutrient solution was due to zoospore encystment induced by osmotic pressure of the nutrient solution.

Information related to the author
© The Phytopathological Society of Japan
Next article
feedback
Top