Kugwiritsa ntchito Bacillus thuringiensis

Bacillus thuringiensisndi mankhwala ophera tizilombo toyambitsa matenda omwe sawononga kwambiri. Amapanga mitundu iwiri ya poizoni, yomwe ndi endotoxins (crystal inclusions) ndi exotoxins, zomwe zimapangitsa kuti tizilombo tisiye kudya ndipo pamapeto pake timafa ndi njala, kuwonongeka kwa magazi komanso kuwonongeka kwa mitsempha.

Njira yophera tizilombo

Pambuyo paBacillus thuringiensisTizilombo tikameza, timayamwa m'mimba mwa tizilombo. M'malo oyenera amchere m'matumbo, timakula ndikuberekana. Poizoni wa kristalo amasungunuka ndi ma protease m'matumbo a tizilombo, ndikupanga tinthu tating'onoting'ono toopsa. Tizilomboti timagwira ntchito pa maselo a m'matumbo a tizilombo, zomwe zimapangitsa kuti matumbo azifa, kubowoka, kufooka kwa thupi la tizilombo, komanso kusiya kudya. Pambuyo pake, Bacillus thuringiensis imalowa m'magazi kuti ibereke, zomwe zimayambitsa septicemia ndikupangitsa kuti tizilombo tife.

Ubwino wa Bacillus thuringiensis:

(1) Njira yopangira ikutsatira zofunikira zoteteza chilengedwe. Pambuyo popopera mankhwala ophera tizilombo, pamakhala zotsalira zochepa m'munda.

(2) Mtengo wopangira ndi wotsika. Zipangizo zake zopangira zimapezeka paliponse ndipo zonse ndi zaulimi komanso zinthu zina, zomwe zimakhala ndi mitengo yotsika.

(3) Mankhwalawa ali ndi zotsatirapo zosiyanasiyana zophera tizilombo. Ndi oopsa ku mitundu yoposa 200 ya tizilombo ta lepidopteran.

(4) Kugwiritsa ntchito mosalekeza kudzapanga dera lomwe lili ndi mliri wa tizilombo, zomwe zidzapangitsa kuti mbewu za tizilombo toyambitsa matenda zifalikire kwambiri, zomwe zingathandize kuwongolera kuchuluka kwa tizilombo mwachilengedwe.

(5) Sili ndi kuipitsa chilengedwe ndi madzi, silivulaza anthu ndi ziweto, ndipo ndi lotetezeka ku tizilombo tambiri tachilengedwe.

(6) Ikhoza kusakanizidwa ndikugwiritsidwa ntchito nthawi yomweyo ndi mankhwala ena osiyanasiyana achilengedwe, owongolera kukula kwa tizilombo, poizoni wa pyrethroid spirochete, carbamate, mankhwala ophera tizilombo a organophosphorus, ndi mankhwala ena ophera fungicides ndi feteleza wa mankhwala.

(7) Kusinthana kugwiritsa ntchito mankhwala ophera tizilombo ndi mankhwala ophera tizilombo kungathandize kuti tizilombo tisamavutike ndi mankhwala ophera tizilombo.

Malangizo ogwiritsira ntchito

Lawani tizilombo todya masamba monga mphutsi za jujube, mphutsi za jujube, mphutsi zapoizoni, ndi mphutsi zobaya. Thirani Bt emulsion pamlingo wa nthawi 500-600 kumayambiriro kwa kukula kwa mphutsi. Njirayi imapereka zotsatira zabwino poletsa tizilombo komanso kuteteza masamba.

Lamulirani jujube ndi apulo codling moth, komanso peyala codling moth. Mu nthawi yoika mazira a mphutsi komanso nthawi yodya zipatso, thirani Bt emulsion (yomwe ili ndi 0.2% synthetic pyrethroid) pamlingo wa nthawi 500-600 mphutsi zisanaukire chipatsocho. Njirayi imapereka zotsatira zabwino popha tizilombo komanso kuteteza zipatso.

Kusamalitsa

① Sizingasakanizidwe ndi mankhwala ophera tizilombo toyambitsa matenda.

② Malo olerera nyongolotsi za silika ayenera kupewa kuwagwiritsa ntchito momwe angathere kuti apewe poizoni wa nyongolotsi za silika.

③ Bacillus thuringiensis imagwira ntchito bwino kutentha kukakhala kokwera (kupitirira 20℃). Ndikoyenera kugwiritsa ntchito kuyambira Juni mpaka Seputembala.

④ Mankhwalawa amatha kuyamwa chinyezi ndipo amapanga ziphuphu. Ayenera kusungidwa pamalo otsekedwa, ouma komanso ozizira.