Zotsatira za mayeso ena a greenhouse m'nyengo yachisanu ndi masika komanso zotsatira za maphunziro a m'munda mu nyengo yolima iyi zawonetsa kuti Palmer Palm masamba dicamba (DR) samva mphamvu.Anthu a ku DR awa akhazikitsidwa m'maboma a Crockett, Gibson, Madison, Shelby ndi Warren komanso mwina zigawo zina zingapo.
Mulingo wa kukana kwa dicamba ndi wotsika kwambiri, pafupifupi nthawi 2.5.M'munda uliwonse, kuchuluka kwa infestation kumayamba ndi kathumba kakang'ono, komwe chomera chachikazi chimafesedwa mu 2019, ndipo dera limakwirira maekala angapo.Izi zikhoza kufaniziridwa ndi masamba oyambirira olembedwa a glyphosate osagwirizana ndi Palmer mar omwe adapezeka ku Tennessee m'chaka cha 2006. Pa nthawiyo, alimi ambiri anali ndi mphamvu zowononga masamba a glyphosate Palmer mar, pamene minda ina Munthuyo adawona kuthawa m'munda mwake.
Pamene mbewu za Xtend zidawonekera koyamba pamalopo, sizinali zachilendo kuti masamba a Palmer mar athawe dicamba, yomwe idasokera paliponse.Zothawa izi zidzakula pang'ono kapena sizimakula pakadutsa masabata awiri kapena atatu.Kenako, mbewu zambiri zidzabisika ndi mbewu ndipo sizidzawonekanso.Komabe, lero m'malo ena, mbale za DR Palmer mar ziyambanso kukula m'malo omwe sizinachitikepo mkati mwa masiku 10.
Zina mwazinthu zapadera za kafukufukuyu ndikuwunika namsongole wa DR m'malo obiriwira obiriwira ku yunivesite ya Tennessee ndi yunivesite ya Arkansas.Kafukufukuyu akuwonetsa kuti kulolerana kwa Palmer masamba omwe adathawa dicamba m'minda ingapo ku Tennessee mu 2019 ndi masamba a Palmer omwe adabzalidwa kuchokera kumbewu zomwe zidatengedwa ku Arkansas ndi Tennessee zaka khumi zapitazo.Koposa ka 2.Mayeso otsatila a greenhouse omwe adachitika ku Texas Tech University adawonetsa kuti anthu omwe adasonkhanitsidwa kuchokera ku Shelby County, Tennessee anali ololera dicamba ka 2.4 kuposa Parma a ku Lubbock, Texas (Chithunzi 1).
Mayesero obwerezabwereza adachitidwa pa ena mwa anthu omwe akuwakayikira a Palmer ku Tennessee.Zotsatira zamayesero am'mundawa zikuwonetsa zowonera mu wowonjezera kutentha, kuwonetsa kuti 1x dicamba application rate (0.5 lb/A) ikhoza kupereka 40-60% Palmer mar masamba kuwongolera.M'mayesero awa, kugwiritsa ntchito dicamba kumangowonjezera kuwongolera pang'ono (Zithunzi 2, 3).
Pomaliza, alimi ambiri anena kuti akuyenera kupopera masamba omwewo a Palmer mar 3 mpaka 4 kuti azitha kuwongolera.Tsoka ilo, malipoti awa akuwonetsa kuti maphunziro owonjezera kutentha ndi kumunda akuwonetsa zomwe alangizi, ogulitsa ndi alimi ku Tennessee amawona m'minda.
Ndiye kodi ndi nthawi yochita mantha?ayi.Komabe, ndi nthawi yoti muunikenso kasamalidwe ka udzu.Tsopano, kasamalidwe ka herbicide ndiyofunika kwambiri kuposa kale.Ichi ndichifukwa chake tikugogomezera kugwiritsa ntchito mankhwala ophera tizilombo okhala ndi thonje, monga paraquat, glufosinate, Valor, diuron, metazox ndi MSMA.
Pamene tikuyembekezera 2021, ndikofunikira kuti tigwiritse ntchito bwino zotsalira za PRE pa Palmer.Kuonjezera apo, ufulu uyenera kugwiritsidwa ntchito mwamsanga mutatha kugwiritsa ntchito dicamba kuthetsa kuthawa.Pomaliza, kafukufuku woyambirira wawonetsa kuti DR Palmer mar idzakhalanso yolimbana ndi 2,4-D.
Chifukwa chake, izi zimapangitsa Liberty kukhala mankhwala ophera udzu wofunikira kwambiri pakuwongolera udzu wa mbewu za Xtend ndi Enlist.
Dr. Larry Steckel ndi katswiri wodziwa udzu ku yunivesite ya Tennessee.Onani nkhani zonse za olemba apa.