Abstract
Due to the risk of pesticide residues in agricultural crops and environmental pollution, the number of pesticides is reduced. One of the methods of plant protection is the use of preparations based on natural plant and animal compounds containing one or more bioactive organic compounds. These include pyrethrins, flavonoids, terpenes, and organosulfur compounds (allicin) that are widespread in the plant world. Organic compounds of animal origin include polysaccharides (chitosan) obtained from the shells of marine crustaceans. Pyrethrins are included in many preparations for combating thrips, flies, mosquitoes, beetles, and aphids. Scientific researchers demonstrated their strong antiseptic effect and their possibility to control phytopathogenic filamentous fungi. The above organic compounds are also elicitors which stimulate the formation of phytoalexins, PR proteins, lignin, and formation of callose that protect plants against pathogens.
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