The end of the twenty and the beginning of the twenty first centuries is characterized by searching ways to preserve the environment and implement the technologies of biologization of growing an agricultural crop. The development of chemical methods for weedkilling now arises out of invention of a new preparation forms which include the usage of antidepressants. The impact of phytotoxicants as well as herbicides on herbs is multifaceted and which activates the search and elaboration of the newest agro techniques, directed to receive the ecologically friendly production. According to the researches of scholars, the reduction of herbicides` phytotoxicity on cultivated plants can be achieved at the result of their integrated treatment with plant growth regulators, displaying an antistress activity.
The results of the research defined that the combined usage of MBP (microbial preparation) Ryzobophyt (1.0 l/t ) and PGR ( plant growth regulator ) Stympo (0.025 l/t ) alongside of application a herbicide Panda in limits 3.0–4.0 l/ha ensures the significant development of keeping pigments in complex of pigments of garbanzo`s leaves, which may tend evidence about the development of more better facilities for transiting physiologico-biochemical processes as well as photosynthetic, established by the immediate stimulating effect of biopreparations on functioning the pigmental complex of the presented crop. Chlorophyll a proved to be more stable to the effect of the stressor. When using MBP Rysobophyt (0.1 l/t) without a herbicide and in variants of application a herbicide Panda in limits 3.0–6.0 l/ha the number of index of chlorophylls (chlorophyll a/chlorophyll b ) was supreme – 3.7. The proportion of chlorophylls a/b currently varies in range of 2.2–4.0 and is used as a marker of a physiological condition of a plant body. The variations in ratio of chlorophylls a/b may tend evidence about indigestion of stoichiometry between the complexes of photosystem`s reaction centres and light-harvesting complexes, and a definite ratio of chlorophyll a and b characterizes the appropriate functioning of a photosynthetic mechanism.