Abstract
In a two-year field experiment, six different weed control methods were studied. The methods were: use of the herbicide glyphosate (GL), use of herbicides based on acetic acid (AA), pelargonic acid (PA) and citrus essential oil (EO), mowing weeds with a thread trimmer (TT) and flaming of weeds with fire (FL). Alternative methods of weed control were significantly less effective than the use of herbicide glyphosate. Due to the lower efficiency of alternative methods, large yield losses have occurred, on average, 31 % at AA, 30.6 % at PA, 22.7 % at EO, 5.4 % at TT and 12.9 % at FL in two years. The cost of carrying out controls with alternative methods was significantly higher than the cost of GL. AA it was higher by 3.2-times, in PA by 7.1-times, in EO by 3.8-times, in TT by 3.8- times and in FL by 5.8-times on average in two years. To achieve a comparable control efficiency of GL, five applications of alternative preparations per year have to be performed, or four times mowing of weeds or five weed flaming operations per year.
Highlights
In a two-year field experiment, six different weed control methods were studied
Strošek izvedbe zatiranja z alternativnimi metodami je bil značilno večji od stroškov pri GL, pri ocetne kisline (OK) za 3,2-krat, pri pelargonske kisline (PK) za 7,1-krat, pri essential oil (EO) za 3,8-krat, pri kosilnico na nit (KO) za 3,8-krat in pri OG za 5,8-krat večji
Letna raba je prilagojena za kmetijo, ki ima 10 ha vinograda
Summary
Poskus je bil izveden v letih 2019 in 2020, v vinogradu na raziskovalni postaji Meranovo (UKC, FKBV UM), na lokaciji Prinčev vrh, v severovzhodni Sloveniji, v 10 let starem vinogradu s sorto ‚Beli pinot‘ (GIS: 46o32′17.01′′N, 15 o33′23.45′′E (n. v. 475 nm)). Kjer smo plevele zatirali s pripravki, s košnjo ali z uporabo ognja, smo imeli še dve vrsti kontrolnih parcelic. Kontrola A - celotno obdobje zapleveljena parcela za ugotavljanje izgube pridelka zaradi plevelov in kontrola B - parcelice, kjer smo plevele vse leto ročno odstranjevali, da ni bilo nikakršnega učinka na pridelek trte. Aplikacija pripravkov je bila izvedena z ročno nahrbtno škropilnico Solo 425 pri uporabi šobe Hypro VP 110 – 03 pri porabi vode 300 l ha-1. Porabo gospodinjskega plina butan/propan smo izračunali tako, da smo jeklenko stehtali pred ožiganjem plevelov in ob zaključku dela na znani površini. Prav tako smo pri stroškovni analizi predvidevali, da se ožiganje plevelov izvede z ožigalnikom, pritrjenim na mulčer, ki ima bočno montirana dva gorilnika.
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