Testing of herbicidal systems for maize cultivation in the Steppe of Ukraine

  • V. Sudak State Institution Institute of Grain Crops of NAAS, 14, V. Vernadskyi str., Dnipro, 49027, Ukraine
  • A. Horbatenko State Institution Institute of Grain Crops of NAAS, 14, V. Vernadskyi str., Dnipro, 49027, Ukraine
  • S. Semenov State Institution Institute of Grain Crops of NAAS, 14, V. Vernadskyi str., Dnipro, 49027, Ukraine
  • А. Kulyk State Institution Institute of Grain Crops of NAAS, 14, V. Vernadskyi str., Dnipro, 49027, Ukraine
Keywords: herbicide system; weeds; weather conditions; technical efficiency; yield; production profitability

Abstract

Goal. To determine the agrarian and economic efficiency of different technological systems for herbicidal protection of maize depending on the weed harmfulness level and weather conditions.

Methods. Field experiment — for the weeds and maize yield accounting, and calculation method — for determining of the technical and economic efficiency of herbicide systems.

Results. We recorded a significant decrease in the inhibitory effect of soil herbicides without precipitation, at elevated air temperature and hot dry wind in the first 5—7 days after their application. Also we specified the best pre-emergence herbicide Acris SE containing the active ingredients: Dimethenamid P (280 g/l) + Terbuthylazine (250 g/l). The number of weeds was indicated according to the experiment variants before spraying crops and 21 days after the application of toxicants. The technical and economic efficiency of combined (pre-emergence + post-emergence herbicides) and mixture of post-emergence products for protection systems of maize was determined.

Conclusions. Under arid conditions, within 5—7 days after the application of pre-emergence herbicides (in 2018, the average background weed infestation of crops — 37 pcs/m2), the chemical plant protection system based on a tank mixture of post-emergence herbicides was ahead in terms of technical efficiency, yield and profitability grain production: Frontier Optima CE (Dimethenamid, 720 g/l) + Stellar RK (Topramezone, 50 g/l + Dicamba, 160 g/l) + Metolat wetting agent. The manifestation of soil herbicide phytotoxicity in favorable weather (in 2019—2020, background weed infestation of crops 129—147 pcs/m2) was more effective when using a combined system for controlling harmful species in the maize production technology: Dual Gold KE (S-metolachlor, 960 g/l) — before sowing + Stellar RK (Topramezone, 50 g/l + Dicamba, 160 g/l) + Metolat wetting agent — post emergence application. The best pre-emergence chemical product was Acris SE (Dimethenamid P, 280 g/l + Terbuthylazine, 250 g/l).

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Published
2021-05-27
How to Cite
Sudak, V., Horbatenko, A., Semenov, S., & Kulyk А. (2021). Testing of herbicidal systems for maize cultivation in the Steppe of Ukraine. Quarantine and Plant Protection, (2), 32-36. https://doi.org/10.36495/2312-0614.2021.2.32-36
Section
MEANS AND METHODS