Takaongorora mishonga yefungicide yekudzivirira zvirwere paWilliam H. Daniel Turfgrass Research uye Diagnostic Center paPurdue University muWest Lafayette, Indiana.Takaita miedzo yakasvibirira pane zvinokambaira bentgrass 'Crenshaw' uye 'Pennlinks' girini.
Mufananidzo 1: Crenshaw bentgrass fungicide kurapwa.Zvikumbiro zvekupedzisira zvakatumirwa muna Nyamavhuvhu 30 yeMaxtima uye Traction uye Nyamavhuvhu 23 yeXzemplar.Miseve inoratidza nguva yekushandiswa kwemazuva gumi nemana (Xzemlar) uye mazuva makumi maviri nerimwe (Maxtima uye Traction) yega yega fungicide.
Kubva Kubvumbi 1 kusvika Gunyana 29, 2023, tichacheka ese magirini kashanu pasvondo pa 0.135 inches.Takashandisa 4 fl.Wetting agent Excalibur (Aqua-Aid Solutions) pamagreens ese ari munaJune 9 ne28. oz/1000 sq. ft. mutengo musi wa20 Chikunguru waive 2.7 fl oz.oz/1000 sq. ft. kudzikamisa nzvimbo dzakaoma nzvimbo.
Takazoisa Fleet wetting agent (2.7 fl oz/1000 sq ft) kune girinhi musi waNyamavhuvhu 16 kudzikamisa nzvimbo dzakaoma.
Takashandisa 9 Tempo SC zvinwiwa (cyfluthrin, Envu).oz/acre uye Meridian (Thiamethoxam, Syngenta) 12 fl oz.June 9 oz/eka yekudzora masvosve.Takaisa 0.5 lb yenitrogen fetiraiza musi waChikumi 10 naGunyana 2 tichishandisa Country Club MD (18-3-18, Lebanon Lawn).N/1000 mativi mana
Zvirongwa zvedu zvekuedza zvaive 5 x 5 tsoka muhukuru uye zvakagadzirirwa kushandisa zvisina kujairika yakazara block dhizaini ine zvidzokororo zvina.Shandisa CO2 powered sprayer pa50 psi uye matatu TeeJet 8008 flat spray nozzles akaenzana ne2 galoni/1000 square feet dzemvura.
Muzvidzidzo zvese (Kuedza 1 uye Kuedza 2), takatanga kurapwa kwese muna Chivabvu 17, nenguva yekutonga kwekupedzisira ichisiyana pakurapa (Table 1).Musi waChikunguru 1, takashandisa chiparadzi chemaoko kugovera zvakaenzana zviyo zverye zvine dhora pamwero we12,5 cc pamubhedha.Tinozosiya tsanga yerye pamusoro pelawn kwemazuva mana tisati tacheka.
Takaongorora kuoma kwenzvimbo dzemadhora zvichienderana nehuwandu hwenzvimbo dzehutachiona panzvimbo.Nzvimbo iri pasi pechirwere chekukura kwechirwere (AUDPC) yakaverengwa uchishandisa nzira ye trapezoidal uchishandisa fomula Σ [(yi + yi+1)/2] [ti+1 - ti], apo i = 1,2,3, ... n -1, apo yi - chiyero, ti - nguva yechiyero che-i.Dhata dzakaiswa mukuongororwa kwekusiyana uye kupatsanurwa kwezvinoreva (P = 0.05) uchishandisa Fisher's yakachengetedzwa LSD bvunzo.
Takatanga kuona mutsauko mukudzora nzvimbo yedhora pakati penzvimbo dzekurapa muna Chivabvu 31st.Musi waChikumi 13, kuomarara kwedhora mukurapa kweprojekiti kwakakwira zvakanyanya pane kumwe kurapwa (Mufananidzo 1).Sezvineiwo, iyo $20 Chikunguru 20 chirongwa chekuomarara kwaive kwakaderera pane kumwe kurapwa.
Musi waAugust 2, nzvimbo dzakabatwa ne 1.3 fl yeTraction (fluazimide, tebuconazole, Nupharm).oz/1000 sq. ft. – The 21-day spot price in US dollars was very high than for the parcel kurapwa neMaxtima (fluconazole, BASF) 0.4 oz.oz / 1000 sq. tsoka pamusoro penguva imwe chete.Musi waGunyana 16 na28, mavhiki maviri neina mushure mekupedzisira chikumbiro, zvichiteerana, zvirongwa zvakarapwa neTraction zvaive nemadhora akawanda kupfuura Maxtima uye aive akadzikira zvakanyanya AUDPC kukosha pane kutonga.
Takatanga kuona nzvimbo yedhora musi waChikunguru 7.Kubva munaChikunguru 7, nzvimbo dzese dzakarapwa dzaive neasingasviki kubuda kumwe pasaiti.Pakanga pasina misiyano yekurapa mukati mekuyedza.AUDPC maitiro muzvikamu zvese zvakarapwa aive akaderera zvakanyanya pane ayo ari muhurongwa hwekutonga husina kubatwa (Table 1).
Purdue University's Daniel Turfgrass Tsvagiridzo uye Diagnostic Center akaongorora kushanda kwemishonga yefungicide pane yakakura, yakasununguka-yakamira inokambaira bentgrass.
Kubva Kubvumbi 1 kusvika Gumiguru 1, cheka katatu pasvondo kusvika pakureba 0.5 inches.Takasuma Ference (cyantraniliprole, Syngenta) musi waChikumi 30 pa 0.37 fl.oz/1000 sq. ft. yewhite grub control.Musi waChikunguru 20, takashandisa iyo moisturizing agent Excalibur pachiyero che2.7 fl.oz/1000 sq. ft. kuderedza nzvimbo dzakaoma dzenzvimbo.
Takashandisa Fleet moisturizing agent (Harrell's) musi waNyamavhuvhu 16 mune 3 fl.oz/1000 sq. ft. kudzikamisa nzvimbo dzakaoma nzvimbo.Takazoisa 0.75 lbs yenitrogen muna Chivabvu 24 tichishandisa Shaw (24-0-22).N/1000 sq. ft. Sep 13, 1.0 lbs.N/1000 mativi mana
Mapoti aive 5 x 5 tsoka muhukuru uye akarongwa mune randomized akazara mabhuroko ane mana akadzokorora.Shandisa CO2 powered sprayer pa45 psi uye matatu TeeJet 8008 flat spray nozzles akaenzana ne1 galoni/1000 square feet dzemvura.
Isu takaisa yekutanga fungicide application muna Chivabvu 19 uye yekupedzisira muna Nyamavhuvhu 18.Rye zviyo zvakatapukirwa nedollar spot pathogen yakashandiswa zvakaenzana nemaoko ekuparadzira paJune 27 uye July 1 pamwero we 11 cm3 uye 12 cm3 per plot, maererano.Tinozosiya tsanga yerye pamusoro pelawn kwemazuva mana tisati tacheka.
Kuoma kwechirwere kwakaongororwa mavhiki maviri ega ega mukati mekudzidza.Kuoma kwechirwere kwakaongororwa nekuona chiyero chenzvimbo yakakanganisika panzvimbo yega yega.Nzvimbo iri pasi pechirwere chekudzivirira kwechirwere (AUDPC) yakaverengwa uchishandisa nzira ye trapezoidal inotsanangurwa pamusoro apa.Dhata dzakaiswa mukuongororwa kwekusiyana uye kupatsanurwa kwezvinoreva (P = 0.05) uchishandisa Fisher's yakachengetedzwa LSD bvunzo.
Takatanga kuona nzvimbo dzemadhora (<0.3% kuoma, 0.2 maronda ane utachiona panzvimbo imwe neimwe) musi waJune 1, uye nhamba yavo yakawedzera kutevera inoculation.Musi waChikunguru 20, nzvimbo idzi dzakarapwa neEncartis (boscalid uye chlorothalonil, BASF) 3 fl.oz/1000 square kupfuura mamwe marongero akarapwa uye asina kurapwa asina kubatwa.
Kubva munaChikunguru 20 kusvika Gunyana 15, hurongwa hwese hwakarapwa hwaive nehutachiona hushoma pane husina kurapwa.Nzvimbo dzakabatwa neEncartis (3 fl oz/1000 sq ft - 14 mazuva), Encartis (3.5 fl oz/1000 sq ft - 21 mazuva) Gunyana 2, mavhiki maviri mushure mekupedzisira application (WFFA) d), Xzemplar (fluxapyroxad, BASF) 0.21 fl.Ounzi/1000 sq. ft. – 21 mazuva, Xzemlar (0.26 oz/1000 sq. ft. – 21 mazuva) uye chirongwa akarapwa nzvimbo aiva shoma dhora nzvimbo kuomarara.
Musi waNyamavhuvhu 3 naNyamavhuvhu 16, mitengo yeEncartis uye nguva dzekupedzisira dzekunyorera hadzina kukanganisa zvakanyanya pakudzora kwedhora reUS.Zvakadaro, munaGunyana 2 uye 15 (WFFA 2 ne4), nzvimbo dzaigona kurapwa neEncartis (3 fl oz/1000 sq ft - 14 mazuva) uye Encartis (3.5 fl oz/1000 sq ft)...– 21 days) ine yakaderera USD stain resistance pane Encartis (4 fl oz/1000 sq ft – 28 days).
Kusiyana neizvi, kusiyana kwehuwandu hwehutungamiri uye nguva yekurapa yeXzemplar naMaxtima haina kukanganisa zvakanyanya kuoma kwemadhora emadhora panguva yekudzidza.Makwikwi ekushandisa epamusoro eDaconil Action (3 fl oz/1000 sq ft) yakasanganiswa neSecure Action haina kukonzera kuderera kwedhora nzvimbo.Musi waGunyana 2, Xzemplar's Dollar Point yekudzivirira hutachiona nzvimbo yakabata mashoma masaiti pane Maxtima.
Iwo maAUDPC maitiro emasaiti ese akarapwa aive akaderera zvakanyanya pane ayo asina kubatwa ekudzora nzvimbo.Kuoma kweDollar spot kwaingogara kwakadzikira muchirongwa ichi mukati mekudzidza, nenhamba yakaderera yeAUDPC tsika dzekurapa kwese.
Nzvimbo dzakarapwa neDaconil Ultrex chete dzaive nepamusoro AUDPC hunhu pane masaiti anorapwa nemarapiro ese kunze kweaya akarapwa ne0.5 ml Secure (fluridinium, Syngenta).oz/1000 sq. ft. – 21 days) Daconil Action (2 fl oz/1000 sq ft) uye Secure Action (azibendazole-S-methyl uye fluazinam, Syngenta) 0.5 fl.oz / 1000 sq. ft. - 21 mazuva Hapana phytotoxicity yakaonekwa mukati mekudzidza.
Nguva yekutumira: Kubvumbi-16-2024