Agriculture and forestry

Rudska Nina – Candidate of Agricultural Sciences, Senior Lecturer of the Department of Botany, Genetics and Plant Protection, Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3, e-mail: ruds@vsau.vin.ua).

The article confirms the feasibility and effectiveness of modern herbicides in corn crops for various methods of tillage. According to the research results, a mixed type of weediness is formed in corn crops, among which the largest share is occupied by late spring late spring species, which accounted for 71,8 % of the total number of weeds that appeared during the growing season of the crop. These included: millet of chickens (Echinochloa crus-galli (L.) Roem.) – 16,1 %, blue bristles (Setaria glauca L.) – 30,4 %, among dicotyledons: small-flowered Galinsoga (Galinsoga rarviflora Cav. ) – 18,4 %, common thyroid (Amaranthus retroflexus L.) – 5,4 %. Early spring was 7,6 %, including white quinoa (Chenopodium album L.) –      7,5 %. Among wintering species, the shepherd's purse ordinary (Capsela bursa pastoris L. Medic) prevailed. – 3,9 %, odorless chamomile (Matricaria perforata Merat.) – 3,2 %, Field yarut (Thlaspi arvense L.) – 2,5 %, field violet (Viola arvensis Murr.) – 2,0 %, with ephemera - medium asterisk (Stellaria media L.) – 5,3 %. Perennial rootstock and weeds of sow thistle pink (Cirsium arvense (L.) Scop.) 0,9%, yellow sow thistle (Sonchus arvensis L.) – 0,1 %, field bindweed (Convolvulus arvensis L.) – 0,9 %, of perennial rhizome - creeping wheatgrass (Elytrigia repens L.) – 0.8%. An insignificant proportion of the species composition of weeds was occupied by perennial strzynekoreni and weeds. Also, when conducting research, it was found that the density of corn standing in the phase of full germination on arable land was in the range of 78,3–78,6 pcs./m2. For small disk processing, this indicator decreased to 78,1–78,2 pcs./m2. For the period  of  maize  harvesting,  differences  in  the  density of standing of corn during various methods of tillage were also noted. So, on plowing under the conditions of herbicide protection, the density was high and was in the range of 72,9–7,2 thousand units. / Ha, while for small disk – 72,3–72,6 thousand units./ha. Herbicidal protection options ensured the death of weeds by 89–100 % within 30 days after their application. At the time of harvesting the crop, the decrease in the number of weeds compared to the untreated areas amounted to 71–98 %. The most effective was the double application of roundup max 2,4 l/ha in phases 3 and 8 of the leaves in corn. The highest yield of corn grain was obtained due to the double use of the herbicide roundup max at a rate of 2,4 l/ha. In the case of police processing, the collection was 9,4 t/ha, and for small-scale processing, it was 9,2 t/ha.

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