Conductance Changes and Responses in Potato Tubers Following Inf'ection with Various Sthains of Phytophthora and with Pythium

Abstract

Electrical conductance measurements were made at high frequency (1 Me/B) !and at low frequency (I kC/H). The high frequency (ELF.) conductanco values woro similar in hcalt,hy and diseased tissue; the low frequency (L.F.) conductaneo values increased with duration of infedion, and changes in them could he used as a quantitative measure of injury.