Propiconazole zokhudza zonse ntchito triazole fungicide
Mafotokozedwe Akatundu
Propiconazole ndi mtundu wa triazole fungicide, womwe umagwiritsidwa ntchito kwambiri m'njira zosiyanasiyana.Amagwiritsidwa ntchito pa udzu womwe umabzalidwa ku mbewu, bowa, chimanga, mpunga wakuthengo, mtedza, ma almond, manyuchi, oats, pecans, apricots, mapichesi, nectarines, plums ndi prunes.Pa chimanga chimalamulira matenda obwera chifukwa cha Erysiphe graminis, Leptosphaeria nodorum, Pseudocerosporella herpotrichoides, Puccinia spp., Pyrenophora teres, Rhynchosporium secalis, ndi Septoria spp.
Njira ya Propiconazole ndi demethylation ya C-14 panthawi ya ergosterol biosynthesis (kupyolera mu kulepheretsa ntchito ya 14a-demethylase monga momwe tafotokozera m'munsimu), ndikupangitsa kuti C-14 methyl sterols ikhale yambiri.The biosynthesis ya ergosterols ndi yofunika kwambiri pakupanga makoma a ma cell a bowa.Kuperewera kwa ma sterols otereku kumachepetsa kapena kuletsa kukula kwa bowa, ndikupewa matenda enanso komanso/kapena kuwukiridwa kwa minyewa yowakokera.Chifukwa chake, propiconazole imatengedwa ngati fungistatic kapena inhibiting kukula osati fungicidal kapena kupha.
Propiconazole imakhalanso inhibitor yamphamvu ya Brassinosteroids biosynthesis.Brassinosteroids (BRs) ndi mahomoni a poly-hydroxylated steroidal omwe amakhudza kwambiri mayankho a zomera zingapo.Amagwira nawo ntchito yowongolera kukula kwa ma cell ndi kugawikana, kusiyanitsa kwa mitsempha, photomorphogenesis, kupendekeka kwa masamba, kumera kwa mbewu, kukula kwa stomata, komanso kupondereza kwa tsamba la senescence ndi abscission.
Propiconazole (PCZ) ndi imodzi mwazogwiritsidwa ntchito kwambiri paulimi.Triazole fungicides amakhala ndi theka la moyo wamfupi komanso kutsika kwa bioaccumulation poyerekeza ndi mankhwala ophera tizilombo a organochlorine, koma zowononga zachilengedwe za m'madzi zimatha kubwera chifukwa cha kutsetsereka kwa utsi kapena kusefukira kwamadzi mvula ikagwa.Amanenedwa kuti asinthidwa kukhala ma metabolites achiwiri mu nyama zakutchire.
Propiconazole imalowa m'malo apansi pa ntchito yake ngati fungicide ya mbewu zosiyanasiyana.M'malo okhala padziko lapansi, propiconazole imawonetsedwa kuti ikulimbikira pang'ono kulimbikira.Biotransformation ndi njira yofunikira yosinthira propiconazole, yokhala ndi zinthu zazikulu zosinthira kukhala 1,2,4-triazole ndi ma hydroxylated pagawo la dioxolane.Phototransformation pa nthaka kapena mumlengalenga sikofunikira pakusintha kwa propiconazole.Propiconazole ikuwoneka kuti ili ndi kusuntha kwapakatikati mpaka kutsika m'nthaka.Imatha kufikira madzi apansi kudzera mu leaching, makamaka mu dothi lokhala ndi zinthu zochepa.Propiconazole imapezeka m'nthaka zamtunda, koma zosintha zimazindikiridwa mozama munthaka.
