Henryk Ratajkiewicz

Possibilities of joint application of tritosulfuron with florasulam as tank mix with other agrochemicals in oatMożliwości łącznego stosowania tritosulfuronu z florasulamem w mieszaninie z innymi agrochemikaliami w uprawie owsa

The aim of the field trials conducted in 2014 and 2015 was to evaluate the possibilities of combined application of herbicides with other agrochemicals in oat crops. The experiments were set up in randomized block design with four replications and plot size of 16.5 m2 at the Agricultural Experimental Station in Winna Góra. The following products were examined in the study: tritosulfuron and florasulam (Biathlon 4D) applied in a mixture with the adjuvant Dash HC or OSMO or the foliar fertilizers (Basfoliar 2.0 36 Extra and ADOB Cu 2.0) and separately or jointly with the retardant Moddus 250 EC (trinexapac ethyl). The investigated components were applied as a tank mix or separately in two treatments within 3 hours. The spraying was performed at the growth stage of first node to second node of oats (BBCH 31–32). The studies showed that the tank mixes of Biathlon 4D with Moddus 250 EC and examined adjuvant and foliar fertilizers controlled efficiently most of the weeds assessed in the trails conducted in the oat crops. The general effectiveness of herbicide and retardant applied separately was similar to joint application of the examined products. Moreover, the study showed that Biathlon 4D at investigated mixes controlled efficiently Chenopodium album, Veronica hederifolia and Veronica persica. The effective protection against weeds with tank mixes of agrochemicals had beneficial effect on oat’s yielding.

The activity of selected herbicides with addition of soil adjuvants in winter wheatAktywność wybranych herbicydów z dodatkiem adiuwantów doglebowych w pszenicy ozimej

The aim of this study was to evaluate activity of herbicides Komplet 560 SC (flufenacet and diflufenican) and Expert Met 56 WG (flufenacet and metribuzin) with addition of soil adjuvants in winter wheat. The herbicides were used in a tank-mixture with the adjuvants Grounded (0.4 l/ha) and OSOL (0.25 l/ha). The herbicides were applied at the recommended doses: Komplet 560 SC – 0.5 l/ha, Expert Met 56 WG – 0.35 kg/ha. The experiments were conducted over two growing seasons (2015/2016 and 2016/2017) at the Experimental Station of the Institute of Plant Protection in Winna Góra in a randomized block design with four replications. The tested herbicides were applied at a growth stage of first leaf unfolded to two leaves unfolded (BBCH 11–12). The most common species of weeds were: Viola arvensis, Matricaria inodora, Polygonum convolvulus, Consolida regalis, Papaver rhoeas and Apera spica-venti. The use of tested adjuvants with soil herbicides at the full recommended doses had insignificant effect on weed control efficacy in winter wheat in autumn. The yield of winter wheat depended on weather condition, weed infestation and weed control efficacy. No phytotoxic effects of applied herbicides (separately and jointly with adjuvants) on winter wheat were observed.