Kodi udzu wanu uli nawo zomwe zikuwoneka zikufa zikukhala ndi pinki kapena utoto wofiira mwa iwo? Izi zikhoza kukhala chizindikiro chodziwika cha ulusi wofiira. Ulusi wofiira ndi matenda a turfgrass omwe amayamba chifukwa cha kuchepa kwa nayitrogeni m'nthaka. Matendawa amapezeka pakati pakumapeto kwa mwezi wa April ndi pakati pa mwezi wa June koma amatha kuwonekera nthawi yochulukirapo. Nthaŵi zake zowonjezereka zimakhala miyezi ya May ndi June pamene kutentha kwa usiku kumapachikidwa kuzungulira 70 F ndipo udzu umakula mopitirira muyeso, pogwiritsa ntchito nayitrogeni m'nthaka.
Kusokonezeka kwa Grasses
Nthawi zambiri udzu wambiri umakhala wofiira kwambiri. Mitundu yosiyanasiyana imaphatikizapo fescue yofiira, ryegrass, Kentucky bluegrass, ndi bentgrass. Mitundu ina yamtunduwu ndi yachibadwa chosakanikirana. Izi zikuphatikizapo "Bilart" ndi "Claudia" zabwino zokongola, "Chateau" Kentucky bluegrass, ndi "Pennant" yosatha ryegrass.
Kodi Nsalu Yofiira Imapha Mbewu?
Ngakhale malo omwe udzu wathanzi amaoneka ngati wakufa, ulusi wofiira supha udzu. Nkhumba zomwe zimayambitsa nkhono zimakhala mu dzenje ndi nthaka ndipo zimatha kufalitsidwa ndi mbewu zakufa zomwe zimatayika ndi kupopera ndi zina zowonongeka. Mitengo ya pinki yomwe imaoneka mu udzu siimapangitsa korona kapena mizu ya zomera, choncho udzu sufa ndi bowa.
Zinthu Zokonda Red Thread
Ulusi wofiira ukhoza kuchitika m'madera ambiri osiyana koma amakhala wamba m'madera omwe ali ndi mvula yamkuntho kapena mvula yambiri kumapeto kwa nyengo yachisanu.
Zomwe zimayambitsa ulusi wofiira ndi:
- Kutsika kwa nayitrogeni
- Kutentha pakati pa 68 F ndi 75 F
- Kutentha kwakulu
Kuzindikira Red Thread
Ulusi wofiira ndi kukula kwa bowa Laetisaria fuciformis ndipo umapezeka m'magulu awiri pa udzu wodwala. Fomu imodzi ili ndi nthambi zofanana ndi ulusi, nthawi zina zimafanizidwa ndi antlers, zotchedwa sclerotia.
Maonekedwe ena amaoneka ngati masango obiriwira a mycelium. Malo okhudzidwa amakhala ozungulira ndipo amakhala oposa 4 mpaka 8 cm. Udzu nthawi zambiri umakhala ndi tani kapena bulauni yofiira pansi pa kukula kwa ulusi wofiira.
Ulusi wofiira nthawi zambiri umasokonezeka ndi matenda otchedwa pinki. Zili ndi mawonekedwe ofanana ndi nkhungu ya pinki ya pinki ndi dola, ndipo matenda onsewa amatha kuwonekera nthawi yomweyo. Komabe, ulusi wofiira amadziwika bwino ndi mawonekedwe ake ofanana ndi mapulani kapena mycelium masango.
Chifukwa Chake Mafunde Anu Angakhudzidwe
Pafupifupi udzu uliwonse umakhala ndi zofiira zofiira. Komabe, si zachilendo kuti udzu wina ukhale ndi zinthu zambiri kusiyana ndi malo oyandikana nawo, chifukwa cha nthaka, malo osungirako, ndi madzi. Cholinga cha ulusi wofiira ndi matenda ena amtunduwu akhoza kumvetsetsedwa poyang'ana pazifukwa za katatu katatu. Izi zimagwiritsidwa ntchito kufotokoza momwe bowa zimamera pa zomera.
Zinthu zitatu mu katatu wa matendawa ndizo zimakhala zochititsa chidwi, tizilombo toyambitsa matenda kapena tizilombo tokha, komanso malo abwino okhudzana ndi matenda. Mabungwe ndiwo udzu wosowa ndi nayitrogeni ndipo akukumana ndi kukula pang'onopang'ono kusiyana ndi miyezi yapitayi. Tizilombo toyambitsa matenda timakhala pamtunda wachitsulo ndipo simungathe kuchotsa kwathunthu.
Pamene chomeracho chili chofooka, ndipo kutentha ndi chinyezi chapafupi zimapangitsa kukula kwa fungal, ulusi wofiira udzawonekera ndikupitiriza kukula.
Kuchiza kwa Red Thread
Nthaŵi zambiri eni eni amadzifunsanso zomwe zingachitike kuti athetse ulusi wofiira pa udzu pamene ukuwonetsa chaka chilichonse. Njira yothetsera vutoli ndiyo kusokoneza katemera wa matendawa kotero kuti bowa amasiya kukula. Popeza sizingatheke kuchotsa tizilombo toyambitsa matenda kapena kuteteza nyengo, njira yabwino kwambiri yothetsera ulusi wofiira ndikulumikiza chomera chokhudzidwa ndikuchilimbitsa ndi feteleza.
Chithandizo chachikulu cha ulusi wofiira ndi kumera udzu wokhala ndi nayitrojeni yoyenera monga gawo la pulogalamu yodyera yopitirira. Mavitrogeni amagwiritsidwa ntchito ku udzu mu kugwa kudzadyetsa nkhuni yowonongeka m'chaka, koma zambiri za nitrojeni zidzatha kumapeto kwa kasupe.
Panthawiyi, nthawi zambiri zimakhala zogwiritsira ntchito makilogalamu awiri a nayitrojeni pamtunda umodzi, ndipo izi zingasinthidwe pa nthaka ndi nyengo. Dziwani kuti zingatenge zaka ziwiri kapena kuposerapo kudyetsa mosamala kuti tipewe ulusi wofiira kuti abwerere kumapeto.
Kutenga ulusi wofiira ndi mankhwala sikukufunikira ndipo sikunyanjidwe ku zitsamba zokhalamo, koma mankhwala ndi njira yabwino kwambiri yochulukirapo. Izi zimaphatikizapo kugwiritsa ntchito fungicide, kawirikawiri mtundu wa Qol inhibitor (strobilurins). Ngati mukufuna kugwiritsira ntchito ulusi wofiira ndi mankhwala, funsani akatswiri othandizira udzu kuti akuthandizeni.