EVALUATION OF TANK MIXTURES OF HERBICIDES PROPONIT AND PLEDGE WHEN APPLIED BEFORE EMERGENCE OF SOYBEANS

The work presents the results of testing tank mixtures of herbicides Proponit and Pledge applied in different doses to soybean crops during preemergence Treatment. The tests were carried out in Primorsky territory by standard methods in the form of the plot experiment in the trial field with brown meadow podzolized soils (by mechanical composition characterized as medium clay, content of humus 3.8%, labile phosphorus and exchange potassium in the soil 16 and 120 mg/kg respectively, PH 5.3). Hydrothermal conditions during the experiment were favorable for the implementation of the herbicidal potential of soil preparations. Trial tank mixtures showed high herbicidal activity against annual grass weeds (Echinochloa crusgalli, Setaria spp), annual dicotyledonous species (Ambrosia artemisiifolia, Acalypha australis, Abutilon theophrasti, Elsholtzia pseudocristata, Chenopodium album), Commelina communis and certain perennial dicotyledonous weeds. The use of mixtures of Proponit and Pledge in higher doses contributed to an increase in protective action and increase in the total herbicidal activity of preparations. The highest yield of soybean in the experiment, 2.41 t/ha, which exceeded the control value by 3.5 times, was achieved in the variant of the soil treatment with a mixture of herbicides in the maximum recommended rates (Proponit 3.0 l/ ha + Pledge 0.12 kg/ha). The economic efficiency of chemical weeding amounted to 39.0 thousand rubles/ha. Thus, in the conditions of soya crops contamination mainly by sensitive annual weed species and with optimal soil moisture, preemergence use of Proponit + Pledge tank mixtures was sufficient for reliable protection of soybean crops and eliminated the need for foliar herbicides.

soybean, weeds, herbicides, tank mixtures, yield

1. Klykov A.G., Kim I.V. Sovremennoe sostoyanie i puti innovatsionnogo razvitiya agrarnoi nauki na Dal’nem Vostoke [Modern state and ways of innovative development of agrarian science in the Far East]. Vestnik Dal’nevostochnogo otdeleniya Rossiiskoi akademii nauk [Vestnik of the Far East Branch of the Russian Academy of Sciences], 2017, no. 3, pp. 5–14. (In Russian).

2. Piven’ V.T., Saenko G.M., Bushneva I.A., Dryakhlov A.I. Zashchita posevov soi ot boleznei, vreditelei i sornyakov [Protection of soya crops from diseases, pests and weeds]. Zemledelie, 2010, no. 3, pp. 30–33. (In Russian).

3. Venevtsev V.Z., Zakharova M.N., Rozhkova L.V. Bor’ba s sornyakami v posevakh soi v Ryazanskoi oblasti [Control of weeds in soybean crops in the Ryazan region]. Zashchita i karantin rastenii [Board of Plant Protection and Quarantine], 2017, no. 12, pp. 28–29. (In Russian).

4. Popova O.V., Rukin V.F., Salmanova I.A. Dlya zashchity soi Tsentral’nogo Chernozem’ya [For the soybean protection in the Central Black Earth region]. Zashchita i karantin rastenii [Board of Plant Protection and Quarantine], 2012, no. 7, pp. 27–31. (In Russian).

5. Larina G.E. Vazhnye osobennosti raboty s pochvennymi gerbitsidami v posevakh podsolnechnika [Important features of soil herbicides use in sunflower crops]. Zashchita i karantin rastenii [Board of Plant Protection and Quarantine], 2017, no. 4, pp. 30–31. (In Russian).

6. Spiridonov Yu.Ya., Larina G.E., Shestakov V. G. Metodicheskoe rukovodstvo po izucheniyu gerbitsidov, primenyaemykh v rastenievodstve [Methodological guide to the study of herbicides used in crop production]. Moscow, Pechatnyi gorod Publ., 2009. 252 p. (In Russian).

7. Dospekhov B.A. Metodika polevogo opyta [Technique of field experiments]. Moscow Kolos Publ., 1973, 335 p. (In Russian).

8. Morokhovets T.V., Morokhovets V.N., Vostrikova S.S., Basai Z.V., Shterbolova T.V. Otsenka obiliya sornykh rastenii v posevakh sel’skokhozyaistvennykh kul’tur Primorskogo kraya [Assessment of the abundance of weeds in field crops in Primorsky krai]. Uspekhi sovremennoi nauki [Modern Science Success], 2017, no. 11, pp. 233–244. (In Russian).