Nthawi yoyenera yothira mankhwala a herbicide ndi itatha 6 koloko madzulo.Chifukwa cha kutentha kochepa komanso chinyezi chambiri panthawiyi, madziwa amakhala pamasamba a udzu kwa nthawi yayitali, ndipo namsongole amatha kuyamwa bwino zosakaniza za herbicide.Ndizopindulitsa kupititsa patsogolo zotsatira zopalira, ndipo panthawi imodzimodziyo, chitetezo cha mbande za chimanga chikhoza kukhala bwino, ndipo phytotoxicity si yophweka.

Pamene ntchito herbicides pambuyo chimanga mbande?

1. Chifukwa chakuti mankhwala ophera udzu akamera amapopera, zimatenga maola 2-6 kuti mayamwidwe ake.M'maola 2-6 awa, ngati zotsatira za herbicide zili bwino nthawi zambiri zimakhala zogwirizana ndi kutentha ndi chinyezi cha mpweya.Utsi m’maŵa, kapena masana ndi masana pamene kuli kouma.

2. Chifukwa cha kutentha kwakukulu, kuwala kwamphamvu, ndi kusinthasintha kwachangu kwa mankhwala amadzimadzi, mankhwala amadzimadzi amasungunuka posakhalitsa kupopera mbewu mankhwalawa, kotero kuti mankhwala a herbicide omwe amalowa mu namsongole amakhala ochepa, zomwe zimapangitsa kuti mayamwidwe osakwanira asokonezeke. herbicidal zotsatira.Kupopera mbewu mankhwalawa pa kutentha kwakukulu ndi chilala, mbande za chimanga zimakhalanso ndi phytotoxicity.

3. Nthawi yoyenera kupopera mbewu mankhwalawa ndi pambuyo pa 6 koloko madzulo, chifukwa panthawiyi, kutentha kumakhala kochepa, chinyezi chimakhala chochuluka, madzi amakhala pamasamba a udzu kwa nthawi yaitali, ndipo namsongole amatha kuyamwa. zosakaniza za herbicide., imathandizira kuwonetsetsa kuti kupalira, ndipo mankhwala amadzulo amathanso kupititsa patsogolo chitetezo cha mbande za chimanga, ndipo sikophweka kuyambitsa phytotoxicity.

4. Popeza ambiri mwa mankhwala a herbicides omwe atuluka mu chimanga ndi nicosulfuron-methyl, mitundu ina ya chimanga imakhudzidwa ndi gawoli ndipo imakonda phytotoxicity, kotero sikoyenera minda ya chimanga kubzala chimanga chokoma, chimanga cha waxy, mndandanda wa Denghai ndi zina. mitundu yopopera mbewu mankhwalawa , kupewa phytotoxicity, kwa mitundu yatsopano ya chimanga, ndikofunikira kuyesa ndikulimbikitsa.

Momwe mungagwiritsire ntchito post-emergence herbicides pachimanga?

1. Yang'anani kukula kwa udzu

(1) Popopera mankhwala ophera udzu pambuyo pa mbande za chimanga, alimi ambiri amaganiza kuti namsongole akakhala ang’onoang’ono, m’pamene amachepetsa kukana komanso kupha udzuwo mosavuta, koma sizili choncho.

(2) Popeza udzu ndi waung’ono kwambiri, palibe malo opangira mankhwala, ndipo zotsatira zake zopalira si zabwino.Zaka zabwino za udzu ndi masamba awiri ndi mtima umodzi mpaka masamba 4 ndi mtima umodzi.Panthawi imeneyi, namsongole ali ndi malo ogwiritsira ntchito.Kukana kwa udzu sikuli kwakukulu, kotero kuti Kupalira kumakhala bwino.

2. Mitundu ya chimanga

Chifukwa chakuti mankhwala ambiri ophera udzu mu chimanga ndi nicosulfuron-methyl, mitundu ina ya chimanga imakhudzidwa ndi chigawochi ndipo imakonda phytotoxicity, choncho n'zosatheka kupopera mbewu m'minda ya chimanga kumene chimanga chokoma, chimanga cha waxy, mndandanda wa Denghai ndi mitundu ina.Kuti apange phytotoxicity, mitundu yatsopano ya chimanga iyenera kuyesedwa isanayambe kukwezedwa.

3. Vuto losakaniza mankhwala ophera tizilombo

Mankhwala ophera tizilombo a Organophosphorous sayenera kupopera mbewu mankhwalawa kwa masiku 7 asanayambe kupopera mbewu mankhwalawa, apo ayi ndizosavuta kuyambitsa phytotoxicity, koma zimatha kusakanikirana ndi pyrethroid.Mankhwalawa amadzaza mtima.

4. Kukana kwa udzu womwewo

M'zaka zaposachedwapa, mphamvu ya namsongole yolimbana ndi kupsinjika maganizo yakhala bwino.Pofuna kupewa kutuluka kwakukulu kwa madzi m'thupi, namsongole amakula osati amphamvu komanso olimba, koma amakula ndi kuchepa, ndipo msinkhu wa udzu siung'ono.Udzu umakutidwa ndi tinthu tating'ono toyera thupi lonse kuti tichepetse kutuluka kwa madzi.