Udzu wamchenga ndi chomera "chomata" chomwe chimawoneka ngati udzu.Nthawi zambiri imafika pa kapinga woonda, makamaka m'zaka zouma.Choncho, kulamulira bwino kwa udzu ndi udzu wandiweyani ndi wathanzi.Komabe, ngati udzu wanu ndi woonda kwambiri masika ano ndipo mchenga wa udzu wa chaka chatha ndi vuto, gwiritsani ntchito mankhwala ophera udzu asanatulukire mchengawo usanawonekere.Komabe, si mankhwala onse ophera udzu omwe asanamenyedwe amagwira ntchito.Zinthu zitatu zomwe zingathandize kuchepetsa kudulidwa kwa udzu ndi udzu, pendimethalin ndi propylenediamine.
Oryzalin amagulitsidwa pansi pa dzina la Weed Impede.Ikhoza kugwiritsidwa ntchito pa udzu wonse wa nyengo yofunda ndi udzu wamtali wa fescue.Kupatula fescue ndi udzu wina wautali, sayenera kugwiritsidwa ntchito pa udzu mu nyengo yozizira, monga Kentucky bluegrass.Oryzalin imathanso kugulitsidwa ngati kuphatikiza kwa Green Light Amaze yokhala ndi benefin.Mofanana ndi udzu wokha, ukhoza kugwiritsidwa ntchito pa udzu wonse wa nyengo yofunda ndi udzu wautali wa fescue.Kupatula fescue ndi udzu wina wautali, sayenera kugwiritsidwa ntchito pa udzu mu nyengo yozizira, monga Kentucky bluegrass.Mtengo wa bauhinia ukayamba kuphuka, gwiritsani ntchito mankhwala a Amaze kapena Oryzalin chakumapeto kwa Epulo 15.
Pendimethalin imagulitsidwa ngati Pendulum pamsika, ndipo palinso mayina ena angapo.Kumbali ya eni nyumba, imagulitsidwa ngati Scotts Halts.Ndibwino kugwiritsa ntchito Pendimethalin mosiyana, theka loyamba lidzagwiritsidwa ntchito mozungulira 15 April, ndipo gawo lachiwiri lidzagwiritsidwa ntchito pa June 1st.Kapena, chitani ntchito yoyamba pamene mtengo wa bauhinia uli pachimake, ndipo masabata asanu ndi limodzi pambuyo pa sabata lachiwiri.
Propylenediamine imagulitsidwa pansi pa dzina lamalonda Barricade.Amagulitsidwanso ngati katundu wa eni nyumba Howard Johnson Crabgrass Control Plus ndi 0.37 Prodiamine 00-00-07.Itha kugwiritsidwa ntchito pa udzu wathu wamba wamba.Pafupifupi pa Epulo 15 kapena maluwa a bauhinia, spartina amagwiritsidwabe ntchito.Ntchito imodzi yokha ndiyofunikira pachaka.
Palibe “mankhwala ophera udzu” amene angaletsedwe kotheratu, koma aliyense ayenera kuthandiza.Quinclorac (drive) imatha kuwongolera pakamera, makamaka ngati mchenga uli pagawo.Quiniclac imapezekanso muzinthu zingapo zophatikizira zomwe zimaletsa udzu wamasamba ndi nkhanu, monga chimodzi mwazinthu izi: Ortho Weed-B-Gon Max + Crabgrass Control;Ortho Weed-B-Gon Max + Crabgrass Control;Ortho Weed-B-Gon Max + Crabgrass Control;BioAdvanced zonse-mu-umodzi udzu udzu ndi crabgrass wakupha;Monterey Crab-E-Rad Plus;chonde herbicide crabgrass wakupha;Trimec Crabgrass Plus herbicide ya udzu;Kupalira kwa bonide Onjezani udzu wa C ndi mankhwala a herbicide;Mankhwala a Spectracide herbicide, oyenera kupha udzu ndi nkhanu.