Susceptibility to Phytophthora infestans of field-and glass-house-grown potato tubers
Summary Tests for resistance toPhytophthora infestans were done twice in each of 2 years on field- and glasshouse-grown tubers of ten cultivars. The cultivar rankings, were almost
identical for the means of the four glasshouse tests and the means of the four field tests. However, for the field tests but
not for the glasshouse tests there were cultivar x harvest date and cultivar x year interactions. It is concluded that resistance
can be assessed on glasshouse-grown tubers and that such assessments should prove more consistent over years than those done
on field-grown tubers.