CHLOROPHYLL ESTIMATION OF SOME POTATO CLONES WITH POTENTIAL RESISTANCE TO LATE BLIGHT DISEASE (PHYTOPHTHORA INFESTANS)

Thirteen potato genotypes with different level of resistance to potato late blight (Phytophthora infestans) pathogen were characterized using non-invasive method to determinate the chlorophyll content and the late blight influence. Field experiment was conducted to NIRDPS Brasov, Romania between 2021-2022. During the vegetation were applied the usual maintenance works (hilling, herbicides), including three treatments for Colorado beetle unless late blight control with fungicides. With SPAD 502 Plus meter (Chlorophyll Meter) were carried out 3 determinations on the leaves of the middle level of 3 plants from each genotype taken into the study. For the evaluation of the results, analysis of variance and Pearson’s correlation analysis were used. In 2021, following the measurements, closely negative correlations were observed between SPAD values and genotypes (-0.058), respectively the date of the observations (-0.126), while in 2022, the correlation was negative between the values regarding the date of the observations (-0.065), but positive at genotypes level (0.030).