The effect of different consumption rates of the herbicide Basis, 75, VG, on the level of stress in maize plants

Abstract

Goal. Establishing the optimally high efficiency of the herbicide Basis, 75, VG, during the control of weed seedlings in maize crops for grain at reduced rates of consumption of the drug to relieve stress in crop plants. Methods. field; laboratory; quantitative and weight; visual; settlement and comparative; mathematical and statistical. Results. According to the results of research, it was found that one spraying of crops with herbicide Basis, 75, VG, with the maximum consumption rate allowed, led to the induction of chemical stress in maize plants (determined to reduce the amount of chlorophyll (a + b) from 1.3 to 1.1 g/dm2), which negatively affected the processes of photosynthesis intensity and partially delayed other physiological processes. According to research, it is established that the optimal from both physiological and agronomic assessment is the use of the herbicide Basis, 75, VG, with reduced consumption rates during successive spraying with a time interval, which provided the herbicide in the most sensitive phases of storm germination. and did not lead to the induction of stress in crop plants. According to the obtained indicators, according to the results of research, the highest grain yield was corn at option 3, 8.75 t/ha or 93.9%, where the first spraying of crops with herbicide Basis, 75, VG, with a rate of 12 g/ha + Trend-90 — 0.2 l/ha, during the phase of formation of three leaves in maize plants, and the second spraying on the 4th day after the first spraying. Conclusions. According to the results of research, a system of application of the herbicide Basis, 75, VG, with reduced consumption rates with a certain time interval between sprays, which eliminates the negative effects of chemical treatment for crops and allows to obtain high yields of corn grain, and the risk of chemical load on the environment 4 to 28%.