Evaluation of the herbicide efficiency on soybean crops

Abstract

Purpose. To study the effectiveness of soybean weed control systems.
 Methods. Field and laboratory.
 Results. It was investigated that the use of Pari herbicide in addition to the impact on weed plants as a result of their direct contact with the product also has a noticeable soil effect, and therefore treatment with a rate of 1.0 l/ha was effective in controlling 88.4% of seedlings weeds. The product showed high selectivity in terms of destruction of both dicotyledonous and monocotyledonous species presented in the experimental site. However, the application of Pari twice with a consumption rate of 0.3 l/ha and on the fourth day + 0.4 l/ha proved to be less effective and 79.0% of weeds died under this scheme. This is most likely due to the difficulty of applying small amounts of the product, in addition, re-application required a second pass of the sprayer, which means that part of the lines lost the protective soil film of the herbicide. We determined the best parameters of plant height in the control treatment, but the indicators of weed control, regardless of the phase of the experiment, were the worst. In addition, in the case of herbicide applications, we obtained values close to the control with slight differences in plant height, which may be due to experimental error.
 Conclusions. It was determined that the herbicide Pulsar 40 proved to be the most effective in the experiment, so with the application of 0.3 l/ha and on the fourth day + 0.4 l/ha, 86.9% of weeds common in soybean crops died. Among herbicides with a combined seed and soil action, Pari and Fabian were effective in applying them once at a full rate. Fabian herbicide was milder than cultivated plants due to the combined active ingredients and lower dose of imazethapyr compared to Pari herbicide. Therefore, the application of 0.1 kg/ha of Fabian yields 3.11 t/ha of soybean seeds. With the use of exclusively germinating preparations, the application of Pulsar 40 at a dose of 0.3 l/ha on the fourth day + 0.4 l/ha was effective, which allowed to form 3.08 t/ha of soy quenching.