Kwiminyaka yakutshanje, izehlo ze rapeseed white rust ziphezulu kakhulu, zichaphazela kakhulu umgangatho we rapeseed.
Umhlwa omhlophe we rapeseed ungachaphazela onke amalungu angaphezulu komhlaba ngalo lonke ixesha lokukhula kodlwengulo, ingakumbi amagqabi kunye neziqu. Xa amagqabi eqala ukusuleleka, amachokoza amancinci aluhlaza anehalo emthubi aya kuvela phambi kwamagqabi, athi ngokuthe ngcembe ajike abe tyheli abe zizilonda ezisazinge. Imibala emhlophe efana nepeyinti iya kubonakala ngasemva kwamagqabi. Xa izibazi zigqabhuka, umgubo omhlophe uya kuphuma. Kwiimeko ezinzima, isifo Amagqabi ajika abe tyheli kwaye awele. Umphezulu we-pedicel osulelekileyo udumbile kwaye ugobile, uthatha ubume be "faucet", kwaye ilungu leentyatyambo lonakaliswe. Iipetals zikhubazekile, zandisiwe, zijika zibe luhlaza kwaye zifana neqabunga, kwaye azibuni ixesha elide kwaye azinamandla. Izilonda ezikwisiqu zinemiva emhlophe e-oblong, kwaye izilonda zidumbile kwaye zigobile.
Kukho amaxesha amabini aphezulu ukusuka kwi-bolting ukuya kwintyatyambo epheleleyo. Esi sifo siqhele ukwenzeka rhoqo phantsi kobushushu obuphantsi kunye neemeko zokufuma eziphezulu zokusingqongileyo. Esi sifo sixhaphake kakhulu kwiindawo ezinomhlaba ophantsi, amanzi amdaka, umhlaba onzima, ukunkcenkceshela ngokugqithisileyo, umahluko omkhulu wobushushu phakathi kwemini nobusuku, ukujiya kombethe onzima, kunye nokufakwa ngokugqithisileyo kwesichumiso senitrogen.
Ukuthintelwa kunye nokunyangwa kwesi sifo kunokuqala kule miba ilandelayo. Okokuqala, kuyimfuneko ukukhetha iintlobo ezikwaziyo ukumelana nezifo. Uhlobo lwe Mustard kunye ne rapeseed zixhathisa kakhulu, zilandelwa luhlobo lwekhaphetshu. Uhlobo lwekhaphetshu luchaphazeleka kwizifo kwaye lunokukhethwa ngokweemeko zendawo; okwesibini, kuyimfuneko ukujikeleza kunye nezityalo zengca kwi-1 ukuya kwi-2 iminyaka okanye ukujikelezisa izityalo phakathi kwezikhukhula kunye nembalela; okwesithathu, kuyimfuneko ukuphelisa ngokungqongqo izifo. Izithole, xa kubonakala "iifaucets", zinqumle ngexesha kwaye zitshise kakhulu; okwesine, faka isichumiso ngokufanelekileyo kwaye ucoce imisele kwaye ukhuphe amabala.
Ngexesha lokuntywilwa kwembewu, iChlorothalonil75% WP 600 amaxesha olwelo, okanye iZineb65% WP 100-150g/667 square metres, okanye iMetalaxyl25% WP 50-75g/667 square metres, fafaza ngama-40 ukuya kuma-50 eekhilogram zamanzi ngokulinganayo, kanye ukuya kwiintsuku ezili-10, fafaza amaxesha ama-2 ukuya kuma-3, anokuthintela ngokufanelekileyo ukwenzeka kwezifo.
Kwinqanaba lokuqala leentyantyambo, unokutshiza iChlorothalonil75% WP 1000-1200 amaxesha olwelo + Metalaxyl25% WP 500-600 amaxesha olwelo, okanye iMetalaxyl 58% ·Mancozeb WP 500 amaxesha olwelo, lawula amaxesha amabini ukuya ku-3 ngokuqhubekayo, kunye nekhefu Iintsuku ezi-7 ukuya kwezi-10 phakathi kwexesha ngalinye, elinefuthe elihle lokulawula kwi-rust emhlophe.
Ixesha lokuposa: Mar-25-2024
