The present paper presents the results of the chemical foliar control research of the species Ailanthus altissima. In the shrubs sprayed on the foliar apparatus, the effect was 100%, only where the solution reached the leaves, and in the tops of the trees where the solution did not spread, the leaves were not affected, having a normal vegetation. It should be noted that this method applied by spraying the foliar apparatus did not affect other shrubs in the vicinity, only the treated herbicide had an effect on those treated. In conclusion, the herbicide had its effect only where it came in contact with the leaves, the rest of the leaves not being affected. In those injected with a herbicide dose of 4 ml / cm in the diameter of the tree (15 cm in diameter corresponds to a dose of 60 ml pure herbicide) at a distance of 30 cm above the ground, the herbicide made its effect 100%, these shrubs drying completely. They were also affected, in addition to those injected a no. of 10 and 12 trees, respectively, on a perimeter of 10 m2 , but not entirely, the foliar apparatus being affected 70-80% of the foliage and at the same time new shoots of approx. 30-40 cm long, and the tendency of herbicidal trees to regenerate after approx. 35 days.

Modern aquaculture technologies are made with the help of recirculation systems, which require the use of innovative and highperformance solutions for the treatment of recirculated water. Aquaculture recirculation is essentially a technology for growing and developing fish or other aquatic organisms by reusing water for more intensive fish production. The technology is based on the use of mechanical and biological filters, and this ecological method can be implemented for any species cultivated in aquaculture, such as fish, shrimp, mussels, etc. The scientific paper presents a brief summary of the control and solution of the main problems faced by water recirculation systems.

Organic foods, functional foods, Food supplements are designed and built from organic agricultural raw materials and natural food additives. In the last ten years, in Romania, there has been a significant increase in ecologically certified areas, an increase in organic cereal crops, areas cultivated with green harvested plants and permanent crops (orchards, vines, fruit bushes). These increases facilitate the obtaining of foods with high nutritional density and an increased processing efficiency. All these are part of the Sustainable Development Strategy of Romania in the period 2020-2030, approved in EC.

From a surface of about 50 ha, located in District Olt, there have been taken soil samples on 0-20 cm depth and there were made agrochemical analyses. In function of the results of the analyses there were calculated the fertilizer doses N, P, K, active ingredients, for the fertilization of the, wheat, corn, sunflower and oil seed rape.

The present work is dedicated to the research of the current state of the fauna and the diversity of the coleoptera in the plum ecosystems in Poboru, Olt county.As a result of the investigations carried out in 2022, in the North-Eastern area of Olt county, the harmful coleoptera species collected in the analyzed orchard ecosystem were classified into 4 families: Scarabaeidae, Scolytidae, Curculionidae and Rhynchitidae. (P.Pasol, Ionela Dobrin , Loredana Frasin, , Treatise on special entomology, Pests of horticultural crops, 2007, page 209-220). Thus, in 2022, 11 species from the Scarabaeidae family, 3 species from the Scolytidae family, 5 species from the Curculionidae family and one species from the Rhynchitidae family were identified. According to the data obtained in 2022, the Scarabaeidae family represented 36.90%, the Scolytidae family was found in a proportion of 22.62%, the Curculionidae family 38.10%, and the Rhynchitidae family 2.38%.