Abalimi bamazambane baseBrithani bangakha isiqalo esihle sezitshalo ngokushintsha isisekelo sezinhlelo zabo zokulawula ukhula olunezinsika ezibanzi zibe Ushaka (carfentrazone-ethyl). Kodwa, njengoba kunjalo nge-diquat, isikhathi siyisihluthulelo sempumelelo.
Iyakwazi ukulawula ukhula olujwayelekile enhlabathini ebanzi ekhula amazambane nasezindaweni, iShark iphumelela kakhulu uma isetshenziswa yodwa noma ixutshwe neminye imithi yokubulala ukhula esele lapho isetshenziswa ngaphambi nje kokuvela kwesitshalo, kusho uJeff Fieldsend, uMphathi Wezobuchwepheshe Bezentengiselwano kwa- I-FMC Agro UK.
Kubalulekile ukubala isikhathi
Kunconywa ukuthi iShark isetshenziswe lapho kuvela u-5-10% (ukuvela kuka-5% ezinhlotsheni zokuqala kanye nokuvela kuka-10% ezinhlotsheni eziyinhloko) kodwa abashayeli kufanele baqaphele uma kukhulunywa ngezikhathi, kuxwayisa uJeff.
"Nakuba ukusetshenziswa kokuvela okungu-5-10% kukhanga maqondana nokuguquguquka kwesikhathi, kungcono ukusebenzisa umkhiqizo “Uma nje ukhula selukhule futhi lungafaki engcupheni yokufaka sekwephuzile, izitshalo ziyashesha kakhulu ngalesi sikhathi futhi ukufakwa sekwephuzile kungazilimaza,” kusho uJeff Fieldsend.
Isazi sezolimo uRob Ramsey siyabika: “I-Shark ibilokhu iyindlela ethembekile yokufaka esikhundleni se-diquat kumakhasimende ami, futhi sibone imiphumela emihle evela ekusetshenzisweni kwesikhathi esifanele, lapho isivuno sibuya ngamandla ngisho nalapho sekuvele u-5-10%, ngakho-ke kukhona ithuba lokufaka isicelo, njengoba kwakunjalo nge-diquat.”
Trials conducted by FMC and AHDB in the UK have proved that Shark is extremely crop-safe when applied at the correct time. However, if application is delayed onto emerged potato plants greater than 5-10%, necrotic spotting will occur, which will be quickly outgrown leading to no long-term effects on vigour or yield.
Isebenza kahle ezinhlobonhlobo zokhula olunamaqabunga abanzi
“Ushaka usebenza kahle kakhulu ezinhlobonhlobo zokhula olunamaqabunga abanzi, ikakhulukazi izinhlobo ze-polygonum, ama-cleavers, i-annual nettle kanye ne-speedwells kuze kufike esigabeni sesitshalo esincane uma kufakwa ngesilinganiso esingu-0.33L/ha, kanti umsebenzi omuhle kakhulu ubonakala zingakapheli izinsuku ezingu-2-3 ngemva kokufakwa,” kusho uJeff.
"Ifanele ukusetshenziswa nazo zonke izinhlobo zamazambane nezinhlobo zezitshalo, kufaka phakathi kokubili izimpahla kanye nembewu, futhi maqondana nokusetshenziswa kwayo ayinasidingo se-buffer zone, futhi imvula ishesha ngehora."
Elinye ithuba lokufaka iShark endaweni engatshaliwe ngaphambi kokutshala kuyindlela evivinyiwe yokuhlanza utshani kanye nokhula olunamaqabunga abanzi, okuvumela ukuqala okuhlanzekile.
“Ukuxuba iShark ne-glyphosate kuvumela abalimi ukuthi babhekane nokhula olunzima i-glyphosate engalulawuli uma lusetshenziswa lodwa,” kweluleka uJeff. “Kukhona intuthuko yangempela ekulawulweni kwe-nettle yonyaka, i-cranesbill kanye ne-willowherbs ngengxube futhi kungavumela amazinga aphansi e-glyphosate ukuthi asetshenziswe. Isikhathi senyanga eyodwa esilandelayo sokusetshenziswa sikhona uma usebenzisa le ngxube ngaphambi kokutshala isivuno kodwa lokhu akuyona inkinga ezimweni eziningi.”
Umbono wesazi sezolimo
Amasimu amasha aqashwe ngabalimi njengendawo yamazambane ehlanzekile aletha izinselele ezintsha zokuphathwa kokhula, kusho uRob Ramsay, ohlinzeka ngezolimo kumahektha angaba ngu-160 ezitshalo zamazambane ezintsha nezicutshungulwayo njengengxenye yokuhamba kwezitshalo ezingamahektha angu-1,600 enyakatho yeLincolnshire.
“Sivame ukubhekana nabantu esingabazi lapho sibhekene nokuphathwa komhlaba omusha, maqondana nobunzima bokhula phakathi kwezinye izinto, ngakho-ke ukuqala ngomhlaba ohlanzekile kubalulekile.
“Yize ingenawo umsebenzi wokhula lotshani, ibamba ukhula olubuthakathaka kancane ngenxa ye-chemistry esele, futhi isinika isiqalo esihle nesihlanzekile sesitshalo, okusisiza ukuthi siphume ngamandla. Futhi uma umthwalo wokhula uphansi, kukhona ithuba lokushintsha izinga kancane, mhlawumbe linciphise libe ngu-0.3 noma ngisho namalitha angu-0.25/ha uma kukhulunywa ngokhula oluncane kuphela, okuyinto evame ukuba njalo.
"Izindleko zokuqasha umhlaba wamazambane azishibhile, ngakho-ke kubalulekile ukutshala imali edingekayo ukuze uthole isivuno esiphezulu. Engeza okusele njenge-Artist (flufenacet + metribuzin) noma i-Praxim (metobromuron), kanye ne-Defy (prosulfocarb), ukuze kwengezwe ukhula olunotshani kanye nokulawulwa kokhula olunezinsika ezibanzi, futhi sinendlela enhle yokubopha ibhande ukuze kuqalwe isivuno kahle."
