Apera spica-venti (L.) P. Beauv. resistance to herbicides in Lithuania and Ukraine

Goal. Check the resistance of populations of Apera spica-venti (L.) P. Beauv. to herbicides from the class of inhibitors acetolactate that are used in crops of winter wheat. Methods. Field and laboratory studies. Visually evaluated the treatment efficacy 4 weeks after application (WAT4). Visible symptoms on the surviving plants were considered in percentage (0% — no survival, 100% plants without visible damage) to the raw options of the same population. Results. Among the tested populations of A. spica-venti resistant to herbicides from the class of inhibitors acetolactate not detected. In all regions of Ukraine, where selected seed samples, there were repeated crops of winter wheat, and was the precursor of the culture of sunflower, soybean, lupin, etc., for control of weeds in crops which were applied the herbicides with a different mechanism of action. The reason for the low efficiency of herbicides in crops of winter wheat could be low rates of application, weather conditions, other factors associated with the technology application of herbicides. Conclusions. Ukraine has not confirmed the resistance of Apera spica-venti (L.) P. Beauv. to the action of herbicides from the class of inhibitors acetolactate, which takes place in Lithuania. Primarily due to differences in the technologies of cultivation of winter wheat, particularly in rotations. In Ukraine, information about the presence in crops of resistant biotypes of weeds are quite limited. To prevent resistance it is necessary to conduct herbological monitoring of major crops considering the experience of countries where this problem is becoming more acute, to develop measures to prevent it.