Mechanical Factors of Influence on Biological Efficiency of Solanum Nigrum L.

Aim. Studying of black nightshade young plants' response to the induced mechanical stresses. Methods. Researches conducted in small plot field experiments. Results. Change of sensitivity level of Solanum nigrum L. plants depending on phases of their development at the moment of damage of elevated parts has been proven. Owing to loss of the surface capable to photosynthesis, there is an essential decrease in volumes of photosynthesis at plants of weed survived and their possibilities of ontogeny passage. The deep induced dis-stresses reduce biological efficiency of plants, their ability to accumulate weight and to form seeds and even lead them to death. Conclusions. The defined principles of response of weed plants to the induced mechanical dis-stresses are can be used for working out and ecological receptions of crops protection from weeds.