THE EFFECT OF ROOT ZONE TEMPERATURE ON THE CONTROL OF PHYTOPHTHORA CRYPTOGEA IN ROCKWOOL-GROWN TOMATO PLANTS
Root growth rate was enhanced by the higher root zone temperature with most biomass confined to the growing block. Zoospore levels and root infection were measured throughout the experiment. Higher temperature increased mycelial growth but decreased sporulation. The results are discussed in relation to the effects of temperature on host carbon availability affecting root establishment, pathogen inoculum levels and ecology.