I-Blackspot bruising iyinkinga yekhwalithi kungakhathaliseki ukuthi iyiphi imakethe yemboni amazambane emiselwe. Ukulimala kwe-blackspot kwenzeka lapho i-tuber ithintwa amandla angaphandle. La mandla angase angaphuli isikhumba, kodwa kunalokho alimaza amaseli angaphansi. I-Blackspot bruise yakheka lapho ama-phenolic compounds amangqamuzana awonakele ekhishwa i-enzyme i-polyphenol oxidase (PPO), yona ekhiqiza amaquinone (umbala obomvana), bese ishintsha ibe nemibala emnyama (melanin). Ngemva kokuba amazambane ehlutshiwe, amangqamuzana awonakele avela njengendawo emnyama noma emnyama.
Ukuthuthukiswa kwendawo emnyama akusheshi futhi kuthatha isikhathi ukuvela ngokubonakalayo. Ubumnyama abulungiseki futhi kuthathwa njengesici kokubili kumazambane amasha kanye nokucubungula. Kudingeka umthelela ukuze kudaleke inxeba le-blackspot. Ngokufanelekile, lapho wazi ngokushesha ngezimo noma okokusebenza okubangela umthelela, kulapho ungenza khona izinguquko ngokushesha noma ukulungisa ukuze unciphise amathuba okulimaza i-blackspot. Ukucwecwa amazambane ukuze ubone inani nezimpawu zokulimaza kwe-blackspot kungaba ithuluzi elihle lokuhlonza izindawo ongazilungisa ukuze ulawule imihuzuko.
Vele uthathe isampula lamazambane ezindaweni ezahlukahlukene ngesikhathi sokuvuna, ukufakwa nokuphuma lapho ugcinwe khona, noma ngemva kokupakisha noma ukuthuthwa. Umthetho ojwayelekile wesithupha uwukubamba amazambane ku-70F amahora angama-24- 48 bese ulinganisa imihuzuko ye-blackspot. Izikhathi ezimfushane (amahora angu-6-12) emazingeni okushisa aphezulu angu-80-90F zisetshenziselwe ukusheshisa ukukhula kokulimala kwe-blackspot ukuze kutholwe ngaphambili. Lezi zincomo bezisekelwe esikhathini namazinga okushisa adingekayo ukuze kushintshe umbala we-blackspot.
Umbuzo usamile, ungawuthola yini umbono omuhle ngezinga lokulimaza kwe-blackspot (isb. umbala ongaphansi kobukhulu) ngesikhathi esifushane ukwenza okokusebenza noma ukulungisa ukulungisa ngokushesha?
Ucwaningo lwakamuva olwenziwe yiNyuvesi yase-Idaho luhlose ukunquma ukuthi ungakwazi yini ukuhlola imihuzuko ngaphambi kwamahora angu-24 futhi ngaphandle kokusebenzisa amazinga okushisa aphezulu. Inhloso eyinhloko kwakuwukubhekana nokuthuthukiswa kwe-blackspot bruise esikhathini esingamahora angu-5 futhi kuqhathaniswe nokuthuthukiswa kokulimala ngemva kwamahora angu-24 eRusset Burbank naseRusset Norkotah. I-pendulum yomthelela yayibekwe endaweni yobude obuyi-intshi engu-7 noma engu-12 futhi yaletha imihuzuko emifaniswano emi-4 kubhatata ngalinye.
Izilimo eziyizigaxa zalinyazwa, zabekwa ku-70⁰ F (isb. izinga lokushisa legumbi), zase zihlolwa ngokubukeka ukuze kutholakale inxeba le-blackspot ku-1, 2, 3, 4, 5, kanye namahora angu-24 ngemva komthelela. Ukushintsha kombala, ngokuyinhloko umbala obomvana, kwaqala ukukhula phakathi nehora lokuqala ngemva komthelela. Isibonelo, i-Russet Burbank ethinteke ngokwehla okungu-12-intshi ibonise u-50% wezindawo zomthelela ezishintshe umbala opinki ngemva kwehora elingu-1.
Ukushintsha kombala obomvana usuka obomvana uye onsundu ngokuyinhloko kwenzeka emahoreni ama-2 kuye kwayi-3 ngemva komphumela, futhi ukuguquguquka kombala ophinki kwehla ngokushesha ngemva kwaleso sikhathi kuzo zombili izimila. Isigameko esiphezulu kanye nobukhulu bokulimala kwe-blackspot kwenzeka emahoreni angama-24; kodwa-ke, ngaphezu kwama-80% wesamba semihuzuko singabonakala ngemva kwamahora ama-3 ukuya kwangu-5 kuye ngamandla omthelela kanye ne-cultivar. Amachashazi amnyama angabonwa esikhathini esingaphansi kwamahora angu-5, kodwa ukuguquguquka okukhulu kusazothatha amahora angaphezu kwangama-24. Le miphumela igqamisa ikhono lokusebenzisa imihuzuko ebomvana noma ensundu/emnyama njengenkomba yangaphambi kwesikhathi yokuhlolwa kwemihuzuko phakathi nokusebenza.
Le mibala ephansi ingase ibonise imihuzuko esanda kuzalwa futhi ingavumela ukukhomba umsuka wokulimala. Ukuhlolwa kokulimala kungaqala phakathi namahora ambalwa ngemva kokuthatha amasampula futhi akudingekile ukulinda amahora angu-24. Ibhokisi elishisayo alidingeki, kodwa iso elihle lokubona "izithunzi" ezihlukahlukene zokulimala kuyadingeka ikakhulukazi imivimbo ebangelwa imithelela ephansi. Ukusheshe kubonakale izindawo ezithinta ukulimala izinguquko ezisheshayo zingenziwa ukuze kuqinisekiswe amazambane asezingeni eliphezulu.