M'zaka zaposachedwa, kuchuluka kwa dzimbiri la rapeseed white rust kwakhala kokulirapo, kusokoneza kwambiri mtundu wa rapeseed.
Dzimbiri loyera la rapeseed lingakhudze ziwalo zonse zomwe zili pamwamba pa nthawi yonse ya kukula kwa kugwiriridwa, makamaka kuwononga masamba ndi zimayambira. Masamba akayamba kudwala, mawanga ang'onoang'ono obiriwira okhala ndi halo wachikasu amawonekera kutsogolo kwa masamba, omwe pang'onopang'ono amasanduka achikasu kukhala zotupa zozungulira. Zipsera zoyera ngati utoto zidzawonekera kumbuyo kwa masamba. Pamene zipsera zimang'ambika, ufa woyera udzatuluka. Woopsa milandu, matenda Masamba kutembenukira chikasu ndi kugwa. Pamwamba pa pedicel yemwe ali ndi kachilomboka ndi kutupa komanso kupindika, kutenga mawonekedwe a "popu", ndipo chiwalo chamaluwa chimawonongeka. Ma petals ndi opunduka, amakulitsidwa, amasanduka obiriwira komanso ngati masamba, ndipo samafota kwa nthawi yayitali ndipo sakhala amphamvu. Zilonda pa tsinde ndi oblong zoyera zipsera, ndi zotupa ndi zopindika.
Pali nthawi ziwiri zazikuluzikulu kuyambira pakukula mpaka maluwa athunthu. Matendawa sachedwa kuchitika kawirikawiri pansi kutentha otsika ndi mkulu chinyezi chilengedwe mikhalidwe. Matendawa amapezeka kwambiri m'madera omwe ali ndi malo otsika, madzi osayenda bwino, nthaka yolemera, kuthirira kwambiri, kutentha kwakukulu pakati pa usana ndi usiku, mame ochuluka, komanso kuthira feteleza wa nayitrogeni.
Kupewa ndi kuchiza matendawa kungayambe kuchokera kuzinthu zotsatirazi. Choyamba, m'pofunika kusankha mitundu yosamva matenda. Mtundu wa mpiru ndi rapeseed ndizovuta kwambiri, zotsatiridwa ndi mtundu wa kabichi. Mtundu wa kabichi umatengeka ndi matenda ndipo ukhoza kusankhidwa malinga ndi momwe zinthu ziliri; chachiwiri, ndikofunikira kuzungulira ndi mbewu za udzu kwa chaka 1 mpaka 2 kapena kutembenuza mbewu pakati pa kusefukira kwa madzi ndi chilala; chachitatu, m`pofunika mosamalitsa kuthetsa matenda. Mbande, pamene "mampopi" akuwonekera, amadula nthawi yake ndikuwotcha kwambiri; Chachinayi, thirirani feteleza bwino ndikuchotsa mitsinje ndikuchotsa madontho.
Pa nthawi ya bolting of rapeseed, Chlorothalonil75% WP 600 times liquid, kapena Zineb65% WP 100-150g/667 square metres, kapena Metalaxyl25% WP 50-75g/667 Square metres, kupopera madzi 40 mpaka 50 kilogalamu 7 aliwonse mofanana, kamodzi. mpaka masiku 10, utsi 2 mpaka 3, zomwe zingalepheretse kuchitika kwa matenda.
Kumayambiriro kwa maluwa, mukhoza kupopera mankhwala a Chlorothalonil75% WP 1000-1200 times zamadzimadzi + Metalaxyl25% WP 500-600 times liquid, kapena Metalaxyl 58% ·Mancozeb WP 500 times liquid , kulamulira 2 mpaka 3 mosalekeza, ndi pakapita nthawi. Masiku 7 mpaka 10 pakati pa nthawi iliyonse, yomwe imakhudza bwino dzimbiri loyera.
Nthawi yotumiza: Mar-25-2024
