Ka pōʻino a me ka kaohi ʻana i ka palaho lau ʻuala

ʻO ka ʻuala, ka palaoa, ka laiki, a me ke kulina, ua ʻike ʻia ʻo ia nā mea kanu ʻehā koʻikoʻi ma ka honua, a he kūlana koʻikoʻi ko lākou i ka hoʻomohala ʻana i ka hoʻokele waiwai mahiʻai o Kina. ʻO ka ʻuala, i kapa ʻia hoʻi he ʻuala, he mau mea kanu maʻamau i ko kākou ola. Hiki ke hana ʻia i mau mea ʻono he nui. Loaʻa iā lākou ka waiwai nui o ka meaʻai ma mua o nā huaʻai a me nā mea kanu ʻē aʻe. He waiwai nui lākou i ka starch, nā minelala a me ka protein. Loaʻa iā lākou nā "ʻāpala ma lalo o ka honua". Inoa. Akā i ke kaʻina hana o ke kanu ʻana i nā ʻuala, hālāwai pinepine nā mahiʻai me nā ʻano mea ʻino a me nā maʻi like ʻole, kahi e hoʻopilikia nui ai i nā pono kanu o nā mahiʻai. I ke kau mahana a me ka pulu, ʻoi aku ka nui o ka maʻi lau ʻuala. No laila, he aha nā hōʻailona o ka maʻi lau ʻuala? Pehea e pale aku ai?

Nā hōʻailona pōpilikia Hoʻopōʻino nui i nā lau, ʻo ka hapa nui o ia mau mea ka maʻi mua ma nā lau ʻelemakule haʻahaʻa i waena a me nā pae hope o ka ulu ʻana. Hoʻopilikia ʻia nā lau ʻuala, e hoʻomaka ana mai kahi kokoke i ka lihi lau a i ʻole ka piko, hoʻokumu ʻia nā kiko necrotic ʻōmaʻomaʻo-ʻeleʻele i ka pae mua, a laila ulu mālie i kokoke i ka poepoe a hiki i nā kiko necrotic nui hina-ʻeleʻele "V", me nā ʻano apo i ʻike ʻole ʻia, a ʻo nā lihi o waho o nā kiko maʻi he Chlorescence a melemele pinepine, a ʻo ka hope loa he necrotic a wela nā lau maʻi, a i kekahi manawa hiki ke hana ʻia kekahi mau kiko ʻeleʻele ʻeleʻele ma nā wahi maʻi, ʻo ia hoʻi, nā conidia o ka pathogen. I kekahi manawa hiki iā ia ke hoʻopili i nā kumu a me nā kumu waina, e hana ana i nā kiko necrotic hina-ʻeleʻele ʻaʻole i hoʻohālikelike ʻia, a ma hope hiki ke hana i nā kiko ʻeleʻele liʻiliʻi ma ka ʻāpana maʻi.

ʻAno hanana ʻO ka palaho lau ʻuala i hoʻokumu ʻia e ka maʻi o ka fungus imperfect fungus Phoma vulgaris. Noho kēia pathogen i ka hoʻoilo ma ka lepo me ka sclerotium a i ʻole hyphae me nā ʻiʻo maʻi, a hiki nō hoʻi ke hoʻoilo ma luna o nā koena kikowaena ʻē aʻe. Ke kūpono nā kūlana i ka makahiki aʻe, hoʻopīpī ka wai ua i nā pathogens lepo ma luna o nā lau a i ʻole nā ​​​​kumu e hoʻoulu ai i ka maʻi mua. Ma hope o ka puka ʻana o ka maʻi, hana ʻia ka sclerotia a i ʻole conidia ma ka ʻāpana maʻi. ʻO nā maʻi hou me ke kōkua o ka wai ua e hoʻolaha ai ka maʻi. ʻO ka mahana a me ke kiʻekiʻe o ka makū e kōkua i ka hanana a me ka laha ʻana o ka maʻi. ʻOi aku ka koʻikoʻi o ka maʻi ma nā ʻāpana me ka lepo maikaʻi ʻole, ka hoʻokele nui ʻana, ke kanu nui ʻana, a me ka ulu nāwaliwali o nā mea kanu.

Nā ʻano hana pale a me ka kaohi Nā hana mahiʻai: koho i nā ʻāpana momona no ke kanu ʻana, e hoʻomaopopo i ka nui o ke kanu kūpono; e hoʻonui i nā mea hoʻouluulu organik, a e hoʻopili pono i nā mea hoʻouluulu phosphorus a me potassium; e hoʻoikaika i ka hoʻokele ʻana i ka wā ulu, e hoʻoinu a me ka hoʻouluulu ʻana i ka manawa kūpono, e pale aku i ka ʻelemakule mua o nā mea kanu; i ka manawa kūpono ma hope o ka ʻohi ʻana E wehe i nā kino maʻi ma ke kula a luku iā lākou ma ke ʻano kikowaena.

Kaohi kemika: ka pale ʻana i ka pīpī a me ka mālama ʻana i ke kahua mua o ka maʻi. I ke kahua mua o ka maʻi, hiki iā ʻoe ke koho e hoʻohana i ka 70% thiophanate-methyl wettable powder 600 manawa wai, a i ʻole 70% mancozeb WP 600 manawa wai, a i ʻole 50% iprodione WP 1200 Multiplying liquid + 50% Dibendazim wettable powder 500 manawa wai, a i ʻole 50% Vincenzolide WP 1500 manawa wai + 70% Mancozeb WP 800 manawa wai, a i ʻole 560g/L Azoxybacter·Wā 800-1200 manawa wai o Junqing suspending agent, 5% chlorothalonil powder 1kg-2kg/mu, a i ʻole 5% kasugamycin·copper hydroxide powder 1kg/mu hiki ke hoʻohana ʻia no ke kanu ʻana i nā wahi i pale ʻia.