Pūtaiao Huawhenua
Ko te pūtaiao huakita o ngā tipu ahuwhenua he peka pūtaiao e ako ana i ngā huakita e pā ana ki ngā tipu kua whakatōkia, hei take mate, hei huakita whai hua hoki hei tautoko i te tipu me te hua. I roto i ngā pūnaha ahuwhenua hou, he mea nui ake te mārama ki te pūtaiao huakita o ngā tipu nā te mea ka taea e ia te āwhina i ngā kaimahi ahuwhenua me ngā kaimahi ahuwhenua ki te whakahaere tika ake i te hauora o ngā tipu, te whakaiti i te whakawhirinaki ki ngā matū, me te whakanui ake i ngā hua o te hua. Kei roto tata i ngā wāhanga katoa o te pūnaha ahuwhenua ngā huakita—i roto i te oneone, i te wai whakamakuku, i ngā mata rau, i ngā kiko tipu, tae noa ki te rohe pakiaka—ā, ka taunekeneke hihiri ki ngā tipu me ētahi atu huakita.
Te tūranga o ngā huakita i roto i ngā pūnaha ahuwhenua
I roto i ngā mara ahuwhenua, ko ngā huakita te kaupapa matua o te huringa matūkai. Ka āwhina rātou i te pirau o ngā mea rauropi, te pirau i ngā toenga tipu, me te huri i ngā huānga pēnei i te hauota, te whākawa, me te whanariki ki ngā āhua ka taea e ngā tipu te mimiti. I tētahi atu taha, ka taea hoki e ētahi huakita te noho hei mate urutā, te whakaeke i te kiko tipu, te whakaoho i ngā tohu mate, te whakaiti i te kounga hua, tae noa ki te whakararu i te hua. Nō reira, ko te ako huakita tipu ahuwhenua ehara i te mea ko te tautuhi huakita anake engari ko te mārama hoki ki te whanaungatanga huakita-tipu-taiao me ngā rautaki hei whakahaere i a rātou.
Ngā huakita tukumate i roto i ngā tipu: ngā āhuatanga me ngā tauira
Ko ngā huakita pathogenic he huakita ka taea te pangia ngā tipu me te whakaputa mate. Ko te tikanga ka puta te mate mā roto i ngā patunga miihini, ngā stomata, ngā hydathode, ngā puare tūturu rānei i roto i te tipu. Ko ngā āhuatanga taiao pēnei i te haumākū nui, te ua, te waipuke, me ētahi pāmahana ka tere ake te horapa o ngā mate huakita.
Ko ētahi o ngā rōpū huakita mate tipu e kitea whānuitia ana:
1. Ngā momo Xanthomonas
E mōhiotia ana tēnei rōpū ka puta ai ngā ira rau, ngā mate pāwera, me ngā pirau i roto i ngā momo hua pērā i te raihi, te tiri, te tōmato, me te hua rākau citrus. Hei tauira, ko te Xanthomonas oryzae te take o te mate pāwera huakita i roto i te raihi, he mate nui ka taea te whakaiti i te hua.
2. Pseudomonas syringae
He maha ngā wā ka puta ngā ira rau me ngā mate pukupuku o te kakau i roto i ngā māra me ngā hua rākau, nā tēnei huakita. Ka ora i runga i ngā mata rau, ā, ka tupu pai i roto i ngā āhuatanga makuku.
3. Ralstonia solanacearum
Ka puta ngā tipu pēnei i te tōmato, te tiri, te rīwai, me te aubergine i roto i te oneone nā te mate pirau huakita. Ka noho tēnei huakita ki roto i te oneone, ka whakaeke i ngā pakiaka, kātahi ka ārai i ngā oko xylem, ka pirau te tipu ahakoa he nui te makuku o te oneone.
4. Erwinia/Pectobacterium spp.
E mōhiotia ana ka pirau ngāwari i roto i ngā huawhenua me ngā kūmara pērā i te rīwai, te kāreti, me te kāpeti. Ka whakaputahia e ngā huakita te whākōkī pectinase, e whakarewa ana i ngā pakitara pūtau, ka ngohengohe, ka waiwai hoki te kiko.
Ko ngā tohu o ngā mate kitakita i roto i ngā tipu ko ngā ira rau kua rumakina ki te wai, te kōwhai o ngā rau, te pirau o te kakau, te pirau haunga kino, me te memeha ohorere. He mea nui te tautuhi tika i te mate, nā te mea he rite tonu ngā tohu kitakita ki ngā mate harore, ki ngā mate tinana rānei.
Ngā huakita whai hua: ngā hoa tipu
Ehara i te mea he kino ngā huakita katoa. He maha ngā huakita e mahi ana hei "mōroiti whai hua" e tautoko ana i te tipu o ngā tipu, e whakanui ana i te wātea o ngā matūkai, e tiaki ana hoki i ngā tipu mai i ngā mate. He maha ngā wā ka kitea ēnei huakita whai hua i roto i te rhizosphere (te rohe e karapoti ana i ngā pakiaka), ngā endophytes (i roto i te kiko tipu), i runga rānei i te mata o ngā rau.
Ko ētahi o ngā mahi a ngā huakita whai hua ko:
1. Te whakapiri hauota
Ka hono tahi ngā huakita pēnei i te Rhizobium ki ngā tipu rēkiumu (pīni soya, pīnati, me te pīni mung) hei hanga i ngā pona pakiaka. I roto i ēnei pona, ka hurihia te hauota hau ki te haukini, he mea pai mō te tipu. Hei tāpiri, ka taea hoki e ngā huakita ora kore utu pēnei i te Azotobacter me te Azospirillum te whakapūmau i te hauota me te kore e hanga pona.
2. Ngā whakarewa phosphate (ngā huakita whakarewa phosphate, PSB)
He maha ngā wā ka herea te whākawa i roto i tētahi āhua e uaua ana ki ngā tipu te mimiti. Ka taea e ngā huakita whakarewa-whākawa pērā i a Bacillus me Pseudomonas te whakaputa waikawa waro, whākōkī rānei hei whakarewa i te whākawa, kia nui ake ai tōna wātea.
3. Te whakaputanga o te homoni tipu
Ka whakaputahia e ētahi huakita ngā phytohormone pērā i ngā auxin (IAA), ngā gibberellins, me ngā cytokinins, e taea ai te whakaoho i te tipu o te pakiaka me te whakanui ake i te mimiti o ngā matūkai.
4. Te whakahaere koiora i ngā mate pāwera
Ka taea e ngā huakita ārai-mate te pehi i ngā pathogens mā te whakataetae mō te wāhi me ngā matūkai, te whakaputa paturopi, te whakaputa siderophore (he here-rino), te whakaoho rānei i te ātete pūnaha i roto i ngā tipu. Ko ngā tauira noa ko Bacillus subtilis me Pseudomonas fluorescens.
Te taunekeneke a ngā huakita ki ngā tipu me te taiao
He nui te pānga o ngā āhuatanga taiao me ngā tikanga whakatipu ki ngā taunekeneke huakita me ngā tipu. Ko ngā āhuatanga pēnei i te pH o te oneone, te nui o ngā mea rauropi, te haumākū, te pāmahana, ngā pūnaha whakamakuku, me te whakamahinga tongi me ngā patupatu ka pā ki te hanganga o ngā hapori huakita. Hei tauira, ko te whakamahinga nui o ngā tongi hauota ka taea te whakaiti i te whakawhirinaki o te tipu ki ngā huakita whakapūmau hauota, ko te whakamahinga o ētahi patupatu ka taea te pehi i ngā moroiti whai hua.
I tētahi atu taha, he pānga nui anō hoki tō te huringa āhuarangi. Ka taea e te pikinga o te pāmahana me ngā tauira ua pōturi te whakawhānui ake i te horapa o ētahi mate urutā me te whakanui ake i te tūponotanga o ngā pakarutanga o ngā mate kitakita. Nō reira, ko te whakahaere e ahu mai ana i te taiao e whai whakaaro ana ki ngā moroiti oneone me ngā tipu he rautaki nui mō te ahuwhenua ā muri ake nei.
Ngā tikanga mō te tautuhi me te tātaritanga o ngā huakita tipu
I roto i te pūtaiao huakita o ngā tipu ahuwhenua, he mea nui te tautuhi tika mō te angitu o te whakahaere. Ka taea e ngā tikanga tautuhi te whakamahi i ngā tikanga tuku iho me ngā tikanga hou:
– Te wehe me te whakatipu i ngā huakita ki runga i te pāpāho agar hei tirotiro i te āhua, te tae, me te tere tipu o te koroni.
– Ngā whakamātautau matū koiora, pērā i te whakamātautau Gram, te oxidase, te catalase, te whakapūtanga huka rānei hei wehewehe i ngā rōpū kitakita.
– Whakamātautau i te mate pāwera (ngā whakatau a Koch) hei whakarite ko ngā huakita te pūtake o te mate.
– Ngā tikanga ngota ngota pēnei i te PCR, te raupapatanga DNA, me te tautuhi ira 16S rRNA mō te tino tika.
– Te whakamātautau serology (ELISA) hei kimi tere i roto i te taiwhanga.
Mā ngā whanaketanga o te hangarau ngota ka taea te tere ake me te tika ake te kite, ahakoa i mua i te putanga mai o ngā tohu, ka taea ai te whakahaere wawe ake.
Ngā rautaki whakahaere mate kitakita i roto i ngā tipu
Me whai huarahi whakauru te whakahaere i ngā mate kitakita nā te mea he uaua te whakahaere i ngā kitakita mā te whakamahi i ngā patu harore tuku iho. Ko ētahi rautaki e whakamahia whānuitia ana ko:
1. Ngā purapura hauora, parakore hoki
He maha ngā mate pāwera e haria ana e ngā purapura, e ngā toenga hua rānei. Mā te whakamahi i ngā purapura whaimana me te horoi i ngā taputapu ahuwhenua ka taea te whakaiti i ngā pūtake o te kano kano.
2. Te hurihanga hua
Mā te hurihanga ki ngā hua ehara i te kainoho ka āwhina i te whakaiti i te taupori o ngā huakita mate i roto i te oneone, inā koa mō ngā mate ka kawea mai e te oneone pērā i te Ralstonia.
3. Te whakahaere wai me te rerenga wai
Ka tere ake te horapa o te mate i te wai mākū me ngā tauhiuhi. Ka taea e ngā pūnaha whakamakuku maturuturu me te rerenga pai te aukati i te whanaketanga o te mate.
4. Ngā momo ātete
He mahi whai hua, he mahi ōhanga hoki te whakamahi i ngā momo momo ātete ki ngā momo ira e pāngia ana e ētahi mate.
5. Ngā kaihoko koiora me ngā tongi koiora
He kōwhiringa pai mō te taiao te whakamahi i ngā huakita hoariri hei patu paturopi koiora me hei ārai moroiti hei whakapai ake i te hauora o te oneone.
6. Ngā patu huakita parahi, ētahi paturopi rānei
Me tūpato te whakamahinga o ngā matū nā te mea he tūponotanga kei te ātetehia ngā rongoā paturopi me ngā pānga ki te taiao. Kua piki haere te here o ngā paturopi ahuwhenua i roto i te maha o ngā whenua.
Ngā tūmanakohanga o te pūtaiao huakita i roto i te ahuwhenua tauwhiro
I ngā rā kei te heke mai, ka nui haere te whakaurunga o te pūtaiao huakita o ngā tipu ahuwhenua ki ngā ariā o te microbiome me te ahuwhenua tika. Ka taea e te rangahau mō ngā hapori huakita oneone te āwhina i te hoahoa i te "hangarau microbiome" mā te tāpiri i te huinga o ngā huakita whai hua, te pehi i ngā pathogens, me te whakanui ake i te whai huatanga o te tongi. Mā ngā auahatanga pēnei i ngā tongi koiora, ngā whakaoho koiora e hangai ana ki ngā huakita, me ngā hangarau tere ki te kimi mate ka tautoko i te whakaputa kai pumau ake i waenga i ngā wero o te huringa āhuarangi me te whakahekenga whenua.
Hei whakamutunga, e whakaako ana te pūtaiao huakita o ngā tipu ahuwhenua, ehara i te mea ko te momo me te tongi anake te mea e whakatau ana i te hauora o ngā tipu, engari ko te taurite o ngā moroiti e karapoti ana i a ia. Mēnā he māramatanga tika, ka taea e ngā huakita te noho hei hoariri hei whakahaere, hei hoa hoki hei atawhai. Ko te whakahaere whakaaro nui i ngā huakita ko te whakahaere i te pūtake o te ora o te oneone me te hua ahuwhenua pumau.
