Herbicides for lamb's quarters control in soybean crops

The results of the study of toxicity level for the lamb's quarters (Chenopodium album L.) of well-known herbicides used in soybean crops as well as herbicides promising for soybean production in the Far East are presented. Lamb's quarters (Chenopodium album L.) is a highly noxious weed species that is widespread in the south of the region. Weediness monitoring conducted in 2006-2020 showed that this species was present in the Primorsky Territory on 63-100% of fields occupied by soybeans with an average growth density of 3-117 pcs/m². In 2013-2020 in a series of experiments, conducted in the conditions of the vegetation house and on the experimental fields of the institute, the toxicity level for Common lamb's quarters was determined by 20 herbicides (based on 14 active substances) used in soybean crops. It was found that the control of this weed species is most effective when applying herbicides in the soil and treating plants with a height of up to 4-11 cm at the early stages of development - 1-3 pairs of leaves. Reliable suppression of lamb's quarters in experiments was provided by the soil (before sowing or before soybean seedlings) use of herbicides containing active substances metribuzin, imazetapir, trifluralin, pendimetalin and acetochlor. Among the active ingredients of the tested foliar herbicides, fomesafen, combinations of bentazone + acifluorfen and imazamox + chlorimuron-ethyl were the most toxic for lamb's quarters. It is recommended to use the following herbicidal preparations to control the spread of lamb's quarters: before sowing or sprouting of soybeans - Lazurit, Zenkor Ultra, Pivot, Proponit, Fabian; for processing vegetative plants - Flex, Galaksi Top, Concept, Classic Forte (Harmony Classic), Proponit.

1. Vishnyakova M.A., Seferova I.V., Samsonova M.G. Genetic sources required for soybean breeding in the context of new biotechnologies (review). Selskohozyaystvennaya biologiya = Agricultural Biology, 2017, vol. 52, no. 5, pp. 905-916. (In Russian). DOI: 10.15389/agro-biology.2017.5.905 rus.

2. Sinegovskii M.O., Kuzmin A.A. State, prospects and phytosanitary risks of soybean production. Zaschita i Karantin rastenii = Plant Protection and Quarantine, 2020, no. 10, pp. 7-11. (In Russian). DOI: 10.47528/1026-8634.2020.10.7.

3. Popova O.V., Rukin V.F., Salmanova I.A. For the soybean protection in the Central Black Earth region. Zaschita i Karantin rastenii = Board of Plant Protection and Quarantine, 2012, no. 7, pp. 27-31. (In Russian).

4. Venevtsev V.Z., Zakharova M.N., Rozhkova L.V. Control of weeds in soybean crops in the Ryazan region. Zaschita i Karantin rastenii = Plant Protection and Quarantine, 2017, no. 12, pp. 28-29. (In Russian).

5. Milenko O.G. Productivity of a soybean agrophytocenosis depending upon variety, seeding and rate and methods of crop care. Izvestiya Timiryazevskoy selskohozyaystvennoy akademii = News of the Timiryazev Agricultural Academy, 2019, vol. 1, pp. 170-181. (In Russian).

6. Vascular plants of the Soviet Far East. Leningrad, Nauka, 1985, vol. 1, 398 p. (In Russian).

7. Golubev A.S., Borushko P.I., Zheltova K.V. Geyser herbicide for soybean protection. Zemledelie = Zemledelie, 2018, no. 6, pp. 37-40. (In Russian). DOI: 10./24411/0044-3913-201810610.

8. Pararhin N.V., Lysenko N.N., Petrova S.N., Kuzmicheva Yu.V., Ryzhov I.A. Evaluation of herbicide system efficacy in agrocenosis of different soybean varieties depending on tillage method. Zemledelie = Zemledelie, 2017, no. 2, pp. 39-43. (In Russian).

9. Kolomiytsev F.B., Sinegovskaya V.T., Sergeev V.K., Gayduchenko A.N. Weed vegetation of the Amur region and measures to combat it. Blagoveschensk, IPK «Priamure», 2003, 168 p. (In Russian).

10. Mantrova G.F., Zaykova L.A. Soil bank of seeds of undesirable plants in agrolandscapes of northern forest-steppe of South Urals. Dokla-dyi Rossiyskoy akademii selskohozyaystvennyih nauk = Reports of the Russian Academy of Agricultural Sciences, 2015, no. 3, pp. 43-46. (In Russian).

11. Spiridonov Yu.Ya., Kalimullin A.T., Abubikerov V.A., Bosak G.S. Some features of weed development in sunflower crops in central nonchernozem region. Agrohimiya = Agricultural Chemistry, 2018, no. 3, pp. 43-49. (In Russian). DOI: 10.7868/S0002188118030067.

12. Koshkin E.I. Crop-weed competitiveness in a canopy. Izvestiya Timiryazevskoy selskohozy-aystvennoy akademii = News of the Timiryazev Agricultural Academy, 2016, vol. 4, pp. 53-64. (In Russian).

13. Kosolap N.P. Atlas of weed seeds. Zerno = Agro, 2008, no. 2, pp. 57-73. (In Russian).

14. Sobolev V.F. Population dynamics of Chenopodium album L. in sowings of spring wheat, using herbicides. Vestnik IrGSHA = Vestnik IrG-SHA, 2016, vol. 76, pp. 86-91. (In Russian).

15. Krylova T.S., Dubrovin A.N., Dorozhkina L.A. Herbicide Gaur in soybean crops of the Amur region. Zaschita i karantin rastenii = Board of Plant Protection and Quarantine, 2020, no. 9, pp. 23-24. (In Russian).

16. Krylova T.S., Dubrovin A.N., Dorozhkina L.A. Efficiency of soil herbicides and their mixtures in soybean crops in the Amur region. Zemledelie = Zemledelie, 2020, no. 4, pp. 33-36. (In Russian). DOI: 10.24411/0044-3913-2020-1040.

17. Krylova T.S., Dubrovin A.N., Dorozhkina L.A. Efficiency of herbicides in soya seeds in the Amur region. Agrohimicheskiy vestnik = Agrochemical Bulletin, 2020, no. 2, pp. 54-57. (In Russian). DOI: 10.24411/1029-2551-2020-10024.

18. Scientific and practical aspects of the technology of application of modern herbicides in crop production / N.V. Nikitin et al. Moscow, Pe-chatnyiy gorod, 2010, 200 p. (In Russian).