PROSPECT OF USING NEW HERBICIDES IN LENTIL CROPS

In 2022-2023, new herbicides (authorized on grain legume crops) were tested in field experiments: Brig (0.5 l/ha); Zontran (0.8 and 1.2 l/ha); Benito (2.0 and 2.5 l/ha) ; Geyser (2.0 and 2.5 l/ha); Hermes (0.7 and 0.9 l/ha); Concept (0.6 and 1.0 l/ha); Coupage (0.006 and 0.008 g/ha); Tanto (0.7 and 1.0 l/ha); Aktion (1.5 and 2.0 l/ha) and Lintoplant (0.5 and 0.8 l/ha) on lentil crops. It was found that soil treatment two or three days before sprouting with herbicides Brig and Zontran provided a good protective effect on annual dicotyledonous weeds, their number by harvesting decreased by 75-91% compared to the control. However, cereal and perennial weeds are hardly eradicated, resulting in yield reductions of 0.35-0.47 t/ha. The efficiency of Zontran at a dose of 1.2 l/ha is higher than that of Brig at a dose of 2.5 l/ha. Pre-emergence application of these herbicides has no toxic effect on lentil plants. It was revealed that spraying of vegetative weeds in lentil agrophytocenosis during the period from one to three leaves with herbicides Geyser (2.0-2.5 l/ha), Benito (2.0-2.5 l/ha), Cupage (0.006- 0.008 g/ha) and Concept (1.0 l/ha) leads to complete death of lentils in 6-15 days. Application of herbicides Hermes (0.8 and 0.9 l/ha), Tanto (0.7 and 1.0 l/ha) and Concept (0.6 l/ha) has a strong toxic effect on lentil plants, which leads to lengthening of the vegetation period by 10-18 days and yield reduction by 25.4-51.6% compared to the variant without chemical treatment (2.17 t/ha). To reduce the weed infestation of lentil crops with annual dicotyledonous weeds, it is advisable to apply Action (1.5 and 2.0 l/ha) and Lintoplant (0.5 and 0.8 l/ha) in the phase of 2-4 leaves of the crop, which practically do not have a depressing effect on plants, lead to a reduction in their number and biomass. However, chemical weeding with these herbicides does not provide removal of cereal (35-48 pcs./m2) and perennial (3-4 pcs./m2) weeds. But such background weediness of crops does not lead to a significant deterioration of crop development conditions, which allowed to obtain grain yield at the level of 1.94-2.04 t/ha with yield in the variant without weeds 2.17 t/ha at LSD05 equal to 0.16 t/ha.