This paper presents the results of aphid species monitoring in the seed potato crop during the growing season using Moerike aphids trap in 2020 and 2021 at INCDCSZ Brașov. Aphids control as direct pests is rarely justified in potato crop but absolutely necessary to prevent indirect damages caused by infecting potato plants with viruses transmitted by aphids. The aphids monitoring in seed potato crops is absolutely necessary to reduce the risk of the appearance and development of aphid populations, implicitly to decrease the incidence of viral contamination. During the two years of study, winged aphids were collected using yellow water traps¸ The vector aphid species were identified from the total of collected aphids. The identification resulted in a number of 20 vector species (682 - total number of individuals) in 2020 and 24 vector species (1843 - total number of individuals) in 2021.

At the National Institute of Research and Development for Potato and Sugar Beet – Brasov, Romania field experiments were carried out in order to collect data on quantitative traits (plant height, number tubers, tuber size, tuber weight) and yield of some new potato genotypes. It was used a complet randomized block design with four replicates. The number of steams varied between 14.5 steams / hill on genotype 1947/2 and 5.5 steam / hill on genotypes 1979/5 and 1901/12. The lowest value of the median leaf length was recorded at clone 21-1901/7 (56 cm) and the highest at clone 1947/2 (181 cm). Brasovia variety (control) has a poorly developed root system (48 g), also the genotypes 1891/7, 21-1895/1, 21-1901/7. Instead, genotypes 1901/6, 1927/1, 1971/9, 1965/16 have a high weight of the root system. Most spectacular production was provided by the line 1979/5 (77.90 t/ha), followed by the lines 1901/7 (45.55 t/ha) and 1939/2 (47.93 t/ha). The lines 1895/4, 1876/7, 1971/9, 1927/1, 1968/2, 1897/2, 1968/1 and 1947/2 also recorded significantly high productions.

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).