# Challenge of Utilization Vegetal Extracts as Natural Plant Protection Products
## 2 Started Point: Chemical Plant Protection Products  
The synthetic chemical protection products are used in agriculture to prevent the growth and destruction of weeds and pests that affect the crop quality. Among the factors determining the alteration of crops' quality and quantity are: wild animals, rodents, insects and, most of all, pathogenic microorganisms, such as: fungi (_Fusarium_ spp., _Aspergillus_ spp., _Lecanicillium lecanui_, _Beauveria bassiana_, _Trichoderma harzianum_, _T. harzianum_), bacteria (_Bacillus thuringiensis_, _Bacillus popilliae_, _Actinomycetes_, _Bacillus subtilis_, _Pseudomonas fluorescens_) and viruses (Baculoviruses, Microspridian--_Lynamntria dispar_) [1, 2, 3, 14, 17, 18]. The action of pests, of any category, is primarily to reduce the quality and quantity of crops and obtained food products, which may affect the health of consumer (e.g., human health) [7, 10, 13]. The specialized literature indicates the existence of several classification criteria of the chemical plant protection products [18]: origin, anti-harmful action (action on pests), physical form of presentation, chemical structure and/or degree of toxicity. In practice, the selection of certain chemical plant protection products is done in compliance with criteria for their actions on pests and toxic effects on the population and the environment [10, 19], such as:  
* Lower impact on human health and a very low toxicity to warm-blooded animals. * Lower toxicity compared to other alternative pest control products. * Lesser effects on other organisms in the environment, such as bees, fish, and birds. * Lower potential for contamination of soil and, implicitly, groundwater. * Minimum number of required applications. * Higher efficiency at lower doses and avoidance to pest resistance. Last but not least, the selection of a particular chemical plant protection product is made according to the purpose and its main characteristics: selectivity and specificity, systemic action, phytotoxicity, occurrence of pest resistance, toxicity to humans and animals, environmental pollution, etc. [1, 6, 7, 10, 19]. Practical use of chemical plant protection products involves direct application to soil/plants, in relatively low doses, in the liquid form or mixtures. Particular attention is paid to the modulation of these compounds, which involves mixing the active substance with various solid ingredients (talc, kaolin, clays, calcium carbonate, etc.) or liquids (water, organic solvents, mineral and/or essential oils), because they must allow uniform spread over large areas of reduced amounts of active substance and achieve an improvement in adhesion to plants and thus ensure an optimal biological effect [19]. Moreover, the choice of conditioning form and formula helps to increase the effectiveness and economics of chemical plant protection product treatments and reduces the risk of pollution and phytotoxicity. Of great importance in the chemical plant protection product conditioning is also the choice of auxiliary products (solvents, surfactants) which should be based on a number of factors dependent on the intended purpose and the final properties of the commercial product [19]: the physicochemical properties and the active substance action; the physiological and biological characteristics of the pest; the type of culture being treated; the soil composition; the climatic conditions, etc. The chemical plant protection products, under different trade names that depend on the manufacturer, are conditioned in various forms to fulfill much user requirements:  
* Solid products such as: powdered powders, wettable powders, granules, impregnated strips, solid fertilizer mixtures, etc. * Liquid products, namely: aqueous solutions, mixtures of organic solvents or mineral oils, which can provide a fine spraying and, in the aerosols, emulsifiable concentrates.