Ua loiloi mākou i nā lāʻau lapaʻau fungicide no ka kaohi ʻana i nā maʻi ma ke kikowaena noiʻi a me ka diagnostic ʻo William H. Daniel Turfgrass ma ke Kulanui ʻo Purdue ma West Lafayette, Indiana. Ua hana mākou i nā hoʻokolohua ʻōmaʻomaʻo ma nā ʻōmaʻomaʻo creeping bentgrass 'Crenshaw' a me 'Pennlinks'.
Kiʻi 1: Ka mālama ʻana i ka lāʻau fungicide ʻo Crenshaw bentgrass. Ua waiho ʻia nā noi hope loa ma ʻAukake 30 no Maxtima lāua ʻo Traction a me ʻAukake 23 no Xzemplar. Hōʻike nā pua i nā manawa noi o 14 mau lā (Xzemlar) a me 21 mau lā (Maxtima lāua ʻo Traction) no kēlā me kēia lāʻau fungicide.
Mai ʻApelila 1 a hiki i Kepakemapa 29, 2023, e ʻoki mākou i nā lau ʻōmaʻomaʻo ʻelua i ʻelima mau manawa i ka pule ma 0.135 ʻīniha. Ua hoʻohana mākou i ka mea hoʻomaʻū 4 fl. Excalibur (Aqua-Aid Solutions) ma nā lau ʻōmaʻomaʻo ʻelua ma Iune 9 a me 28. oz/1000 sq. ft. ʻO ke kumukūʻai ma Iulai 20 he 2.7 fl oz. oz/1000 sq. ft. e kaupalena i nā wahi maloʻo kūloko.
A laila ua hoʻopili mākou i ka mea hoʻomaʻū Fleet (2.7 fl oz/1000 sq ft) i nā greens ma ʻAukake 16 e kaupalena i nā wahi maloʻo kūloko.
Ua hoʻohana mākou i 9 mau wai Tempo SC (cyfluthrin, Envu). oz/ʻeka a me Meridian (Thiamethoxam, Syngenta) 12 fl oz. Iune 9 oz/ʻeka no ka kaohi ʻana i nā ʻanuʻu. Ua hoʻopili mākou i 0.5 lb o ka mea hoʻomomona naikokene ma Iune 10 a me Kepakemapa 2 me ka hoʻohana ʻana iā Country Club MD (18-3-18, Lebanon Lawn). N/1000 kapuaʻi kuea
ʻO ka nui o kā mākou mau ʻāpana hoʻokolohua he 5 x 5 kapuaʻi a ua hoʻolālā ʻia me ka hoʻohana ʻana i kahi hoʻolālā poloka piha randomized me ʻehā mau replications. E hoʻohana i kahi mea pīpī CO2 ma 50 psi a me ʻekolu mau nozzles pīpī pālahalaha TeeJet 8008 ma ke ʻano like me 2 galani/1000 kapuaʻi kuea o ka wai.
Ma nā haʻawina ʻelua (Hoʻokolohua 1 a me Hoʻokolohua 2), ua hoʻomaka mākou i nā lāʻau lapaʻau āpau ma Mei 17, me ka manawa o ka hoʻokele hope loa e loli ana ma waena o nā lāʻau lapaʻau (Papa 1). Ma Iulai 1, ua hoʻohana mākou i kahi mea hohola lima e hoʻolaha like i ka palaoa rye i hoʻopiha ʻia me kahi kiko kālā ma ka wikiwiki o 12.5 cc no kēlā me kēia moena. A laila waiho mākou i ka palaoa rye ma luna o ka lau nahele no ʻehā lā ma mua o ka ʻoki ʻana.
Ua loiloi mākou i ke koʻikoʻi o nā kiko kālā ma muli o ka helu o nā kikowaena maʻi ma kahi. Ua helu ʻia ka wahi ma lalo o ke kaʻina holomua o ka maʻi (AUDPC) me ka hoʻohana ʻana i ke ʻano trapezoidal me ka hoʻohana ʻana i ke ʻano Σ [(yi + yi+1)/2] [ti+1 − ti], kahi i = 1,2,3, … n -1, kahi yi - helu, ti - manawa o ka helu i-th. Ua hoʻokomo ʻia nā ʻikepili i ka nānā ʻana o ka variance a me ka mean separation (P=0.05) me ka hoʻohana ʻana i ka hoʻāʻo LSD pale ʻia a Fisher.
Ua ʻike mua mākou i nā ʻokoʻa o ka kaohi ʻana i ke kālā ma waena o nā wahi lapaʻau ma Mei 31. Ma Iune 13, ʻoi aku ka kiʻekiʻe o ke koʻikoʻi o ke kālā ma nā lapaʻau o ka papahana ma mua o nā lapaʻau ʻē aʻe (Kiʻi 1). I ka ʻaoʻao ʻē aʻe, ʻoi aku ka haʻahaʻa o ke koʻikoʻi o ka papahana $20 Iulai 20 ma mua o nā lapaʻau ʻē aʻe.
Ma ʻAukake 2, ua mālama ʻia nā wahi me 1.3 fl o Traction (fluazimide, tebuconazole, Nupharm). oz/1000 sq. ft. – ʻOi aku ke kiʻekiʻe o ke kumukūʻai kiko 21 lā ma nā kālā US ma mua o nā ʻāpana i mālama ʻia me Maxtima (fluconazole, BASF) 0.4 oz. oz/1000 sq. kapuaʻi ma ka manawa like. Ma Kepakemapa 16 a me 28, ʻelua a me ʻehā pule ma hope o ka noi hope loa, kēlā me kēia, ʻoi aku ka nui o nā kālā kiko o nā ʻāpana i mālama ʻia me Traction ma mua o Maxtima a he haʻahaʻa loa nā waiwai AUDPC ma mua o ka mana.
Ua ʻike mua mākou i ke kiko kālā ma Iulai 7. I ka lā 7 o Iulai, ua emi iho ma mua o hoʻokahi puka ʻana o ka maʻi ahulau ma nā wahi āpau i mālama ʻia ma kēlā me kēia wahi. ʻAʻohe ʻokoʻa o ka mālama ʻana ma o ka hoʻokolohua. ʻOi aku ka haʻahaʻa o nā waiwai AUDPC ma nā ʻāpana āpau i mālama ʻia ma mua o nā mea ma nā ʻāpana kaohi i mālama ʻole ʻia (Papa 1).
Ua loiloi ke Kikowaena Noiʻi a me Diagnostic ʻo Daniel Turfgrass ma ke Kulanui ʻo Purdue i ka pono o nā lāʻau lapaʻau fungicide ma ka bentgrass kolo makua a kūʻokoʻa.
Mai ʻApelila 1 a ʻOkakopa 1, e ʻoki mauʻu i ʻekolu manawa i ka pule a hiki i ke kiʻekiʻe o 0.5 ʻīniha. Ua hoʻolauna mākou iā Ference (cyantraniliprole, Syngenta) ma Iune 30 ma 0.37 fl. oz/1000 sq. ft. no ka kaohi ʻana i nā ʻuku keʻokeʻo. Ma Iulai 20, ua hoʻohana mākou i ka mea hoʻomaʻū Excalibur ma kahi nui o 2.7 fl. oz/1000 sq. ft. e kaupalena i nā wahi maloʻo kūloko.
Ua hoʻohana mākou i ka mea hoʻomaʻū Fleet (Harrell's) ma ʻAukake 16 i loko o kahi 3 fl. oz/1000 sq. ft. e kaupalena i nā wahi maloʻo kūloko. A laila ua hoʻopili mākou i 0.75 lbs o ka naikokene ma Mei 24 me ka hoʻohana ʻana iā Shaw (24-0-22). N/1000 sq. ft. Sep 13, 1.0 lbs. N/1000 kapuaʻi kuea
He 5 x 5 kapuaʻi ka nui o nā ʻāpana a ua hoʻonohonoho ʻia i loko o nā poloka piha i hoʻonohonoho ʻia me ʻehā mau hana hou. E hoʻohana i kahi mea pīpī CO2 ma 45 psi a me ʻekolu mau nozzles pīpī pālahalaha TeeJet 8008 ma ke ʻano like me 1 galani/1000 kapuaʻi kuea o ka wai.
Ua hoʻopili mākou i ka hoʻopili fungicide mua ma Mei 19 a ʻo ka hope ma ʻAukake 18. Ua hoʻopili like ʻia ka palaoa rai i loaʻa i ka pathogen dollar spot me ka mea hohola lima ma Iune 27 a me Iulai 1 ma ka helu o 11 cm3 a me 12 cm3 no kēlā me kēia ʻāpana. A laila waiho mākou i ka palaoa rai ma luna o ka lau nahele no ʻehā lā ma mua o ka ʻoki ʻana.
Ua loiloi ʻia ke koʻikoʻi o ka maʻi i kēlā me kēia ʻelua pule ma ke aʻo ʻana. Ua loiloi ʻia ke koʻikoʻi o ka maʻi ma ka loiloi ʻana i ka pakeneka o ka wahi i hoʻopilikia ʻia ma kēlā me kēia wahi. Ua helu ʻia ka wahi ma lalo o ke kaomi kaomi maʻi (AUDPC) me ka hoʻohana ʻana i ke ʻano trapezoidal i wehewehe ʻia ma luna. Ua hoʻokomo ʻia nā ʻikepili i ka nānā ʻana o ka ʻokoʻa a me ka hoʻokaʻawale awelika (P=0.05) me ka hoʻohana ʻana i ka hoʻāʻo LSD pale ʻia a Fisher.
Ua ʻike mua mākou i nā kiko kālā (<0.3% koʻikoʻi, 0.2 mau ʻeha i loaʻa i kēlā me kēia wahi) ma Iune 1, a ua piʻi aʻe ko lākou helu ma hope o ka hoʻopili ʻia ʻana. Ma Iulai 20, ua mālama ʻia nā wahi me Encartis (boscalid a me chlorothalonil, BASF) 3 fl. oz/1000 sq. ft - 14 mau lā a me 4 fl oz/1000 sq. ft. - 28 mau lā, Daconil Ultrex (chlorothalonil, Syngenta) 2.8 fl oz/1000 sq. ft. - 14 mau lā, ʻoi aku ka liʻiliʻi o nā kiko kālā o nā ʻāpana i mālama ʻia ma mua o nā ʻāpana ʻē aʻe a pau i mālama ʻia a me nā kaohi i mālama ʻole ʻia.
Mai Iulai 20 a hiki i Kepakemapa 15, ua emi ka nui o nā maʻi i nā ʻāpana āpau i mālama ʻia ma mua o nā ʻāpana kaohi i mālama ʻole ʻia. ʻO nā wahi i mālama ʻia me Encartis (3 fl oz/1000 sq ft – 14 lā), Encartis (3.5 fl oz/1000 sq ft – 21 lā) Kepakemapa 2, ʻelua pule ma hope o ka hoʻopili hope loa (WFFA) d), Xzemplar (fluxapyroxad, BASF) 0.21 fl. ounce/1000 sq. ft. – 21 lā, Xzemlar (0.26 oz/1000 sq. ft. – 21 lā) a me nā wahi i mālama ʻia me ka papahana i loaʻa ka liʻiliʻi loa o ke koʻikoʻi o ka wahi kālā.
Ma ʻAukake 3 a me ʻAukake 16, ʻaʻole i loaʻa ka hopena koʻikoʻi o nā kumukūʻai a me nā lā palena noi o Encartis i nā kaohi kiko o ke kālā US. Eia nō naʻe, ma Kepakemapa 2 a me 15 (WFFA 2 a me 4), ʻoi aku ka nui o ka mālama ʻia ʻana o nā wahi me Encartis (3 fl oz/1000 sq ft - 14 mau lā) a ʻo Encartis (3.5 fl oz/1000 sq ft). . . - 21 mau lā) he haʻahaʻa ka pale ʻana i ka ʻili USD ma mua o Encartis (4 fl oz/1000 sq ft - 28 mau lā).
I ka hoʻohālikelike ʻana, ʻaʻole i hoʻopilikia nui nā ʻokoʻa o ka nui o ka lawelawe ʻana a me ka manawa mālama ʻana o Xzemplar lāua ʻo Maxtima i ke koʻikoʻi o nā wahi dollar i ka wā o ke aʻo ʻana. ʻO nā helu noi kiʻekiʻe o Daconil Action (3 fl oz/1000 sq ft) i hui pū ʻia me Secure Action ʻaʻole i hopena i ka emi ʻana o ka wahi dollar. Ma Kepakemapa 2, ua mālama ke kikowaena kaohi maʻi Dollar Point o Xzemplar i nā wahi liʻiliʻi ma mua o Maxtima.
ʻOi aku ka haʻahaʻa o nā waiwai AUDPC o nā wahi i mālama ʻia a pau ma mua o nā wahi kaohi i mālama ʻole ʻia. ʻOi aku ka haʻahaʻa o ke koʻikoʻi o ka dollar spot ma nā kiʻi ma kēia papahana ma o ke aʻo ʻana, me nā waiwai AUDPC helu haʻahaʻa loa o nā lāʻau āpau.
ʻO nā wahi i mālama ʻia me Daconil Ultrex wale nō he kiʻekiʻe aʻe nā waiwai AUDPC ma mua o nā wahi i mālama ʻia me nā lāʻau āpau koe wale nō nā mea i mālama ʻia me 0.5 ml Secure (fluridinium, Syngenta). oz/1000 sq. ft. – 21 lā) Daconil Action (2 fl oz/1000 sq ft) a me Secure Action (azibendazole-S-methyl a me fluazinam, Syngenta) 0.5 fl. oz/1000 sq. ft. – 21 lā ʻAʻohe phytotoxicity i ʻike ʻia ma ke aʻo ʻana.
Ka manawa hoʻouna: ʻApelila-16-2024