THE DYNAMIC MONITORING OF SOME DAMAGING AGENTS IN FRUIT GROWING RELATED TO CLIMATE CHANGES OF LAST DECADE

Abstract

Nowadays, the average values of the main parameters of the local climate and microclimate have changed significantly compared to the pre-industrial period. The immediate consequences are quite obvious, namely: the earlier initiation of vegetation of the most fruit tree species (with about 2 weeks), the increase in the frequency of damages caused by late spring frosts, the prolongation of periods of water stress into the soil and in the atmosphere, accompanied by the blocking photosynthetic activity and increased cell respiration, increased frequency and severity of burns on fruits through the combined effect of insolation and extremely high temperatures, earlier ripening and decreased fruit firmness and acidity. Changes have become obvious in the biological cycle of pests, harmful for fruit growing, especially by the appearance of additional generations with high aggressiveness, the increase of the risk, frequency, intensity and duration of the attack of pathogens. In fruit growing, the depletion of the level and quality of the harvest is caused by bacterial and fungal pathogens (over 155; 41%), pests (over 132; 35%), viruses, viroids and mycoplasmas (over 67; 17%) and dominant mono- and dicots (over 26; 7%). In the last 20 years, technical means have appeared, which allow the monitoring the physico-chemical and humidity parameters of the soil, the local microclimate, as well as the physiological and health status of the plants. The paper presents the results obtained in the period 2018-2022 at RIFG Pitesti-Mărăcineni, in the monitoring of some harmful agents, using independent analog or digital devices, automatic or semi-automatic weather stations with software for real-time data collection and processing, forecasting and warning modules of the risk of attack. These assets allowed the highlighting of the dynamics of some of the damaging agents in fruit growing, the professional scheduling and carrying out of phytosanitary actions in bearing orchards, the reduction of the allocated resources consumption and the protection of the environment.