1. Behavioral study of some apricot varieties in Bucharest area
University of Agronomic Sciences and Veterinary Medicine of Bucharest
Faculty of Horticulture
International Student Symposium “Hortus Academicus”
March 29, 2019, Bucharest, Romania
Behavioral study of some apricot varieties in Bucharest area
Authors names: Dîrmină Narcis Teodor
Coordinator : Prof. Dr. Dorel Hoza
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

2. Introduction
The main problem in apricot culture is represented by climate accidents:
Freezing rain
High temperature variation
Late frosts
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

3. Objectives
Studying the influence of climatic accidents on flowering and fructification.
Analysis of blooming phenology.
Analysis of productive potential.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

4. I used the stationary analysis method and basic laboratory analyses.
Materials and Methods
Six Romanian apricot varieties:
Dacia
Tudor
CMB de Ungaria
Augustin
Olimp
Orioznt
I used the stationary analysis method and basic laboratory analyses.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

5. Results and discussions
The winter of was one with high temperatures, and in spring there were extreme phenomena.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

6. A B
Dead buds
A – buds that died in January due to temperature variation
B, C – buds to which only the pistil has died
D – a bud that died totally due to the late frosts C D
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

7. Freezing rain
This is a rare meteorological phenomenon, in which rain drops instantly freeze at the ground.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

8. Binding of fruit
In the spring of 2018 the binding of apricot varieties was a weak one. Thus they bound only 12.5% ​​of the flowers to the Tudor variety and 78% to the Augustin variety.

9. The fruit drop in 2018
The fruits were affected by the June drop and early fruit drop in the proportions ranging from 35% to the CMB de Ungaria variety to 77% to the Tudor variety.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

10. The winter and spring of 2019 were much warmer and without climatic accidents. So, the percentage of buds affected by frost was much lower than in the previous year. The percentage of dead buds was very small under 20% for all six varieties
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

11. The phenology of blooming and and fructification

12. Conclusions and recommendations
Characteristic
Olimp
Tudor
Flowering
Fruit set
Resistence to climatic accidents
Percentage of dead buds
Fruit drop
Late flowering
12.5% in 2018
Hight resistance
25% in 2018
40% in 2018
Early flowering
53% in 2018
Low resistance
74% in 2018
77% in 2018
The best variety is Olimp
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania