Bacillus thuringiensisyog cov tshuaj tua kab uas tsis muaj tshuaj lom. Nws feem ntau tsim ob hom tshuaj lom, uas yog endotoxins (crystal inclusions) thiab exotoxins, uas ua rau cov kab tsuag tsis noj mov thiab thaum kawg tuag vim kev tshaib plab, ntshav tsis zoo thiab neurotoxicity.
Txoj kev tua kab
Tom qab lubBacillus thuringiensisyog kab noj, nws ua kab mob hauv plab hnyuv ntawm tus tswv tsev. Hauv qhov chaw alkaline tsim nyog hauv plab, nws loj hlob thiab rov tsim dua. Cov tshuaj lom siv lead ua ke raug hydrolyzed los ntawm proteases hauv txoj hnyuv ntawm lub cev kab, tsim cov subunits me me lom. Cov subunits no ua rau cov hlwb epithelial ntawm lub cev kab, ua rau txoj hnyuv tuag tes tuag taw, perforation, tuag tes tuag taw ntawm lub cev kab, thiab tsis noj mov. Tom qab ntawd, Bacillus thuringiensis nkag mus rau hauv cov ntshav kom rov tsim dua, ua rau septicemia thiab ua rau kab tuag.
Cov txiaj ntsig ntawm Bacillus thuringiensis:
(1) Cov txheej txheem tsim khoom ua raws li cov kev cai tiv thaiv ib puag ncig. Tom qab txau cov tshuaj tua kab, tsis muaj cov khoom seem tshuav hauv daim teb.
(2) Tus nqi tsim khoom qis. Nws cov khoom siv raw muaj ntau thiab txhua yam yog cov khoom ua liaj ua teb thiab cov khoom siv sab nraud, nrog rau tus nqi qis.
(3) Cov khoom muaj ntau yam tshuaj tua kab. Nws lom rau ntau tshaj 200 hom kab tsuag lepidopteran.
(4) Kev siv tas mus li yuav ua rau muaj kab tsuag sib kis, ua rau muaj cov noob kab mob sib kis dav dav, ua tiav lub hom phiaj ntawm kev tswj cov kab tsuag kom ntau.
(5) Nws tsis muaj kuab paug rau ib puag ncig thiab cov dej, tsis muaj teeb meem rau tib neeg thiab tsiaj txhu, thiab muaj kev nyab xeeb rau feem ntau cov kab yeeb ncuab ntuj.
(6) Nws tuaj yeem sib xyaw thiab siv tam sim ntawd nrog ntau yam kev npaj tshuaj lom neeg, cov tshuaj tswj kev loj hlob ntawm kab, cov tshuaj lom pyrethroid spirochete, carbamate, cov tshuaj tua kab organophosphorus, thiab qee cov tshuaj fungicides thiab cov tshuaj chiv.
(7) Kev siv tshuaj tua kab hloov pauv nrog cov tshuaj tua kab tuaj yeem txhim kho kev tiv thaiv kab tsuag rau cov tshuaj tua kab.
Cov lus qhia siv
Tswj cov kab tsuag noj nplooj xws li cov kab ntsig jujube, npauj npaim jujube, npauj npaim lom, thiab npauj npaim pos. Tsuag Bt emulsion ntawm qhov concentration ntawm 500-600 zaug thaum lub sijhawm pib ntawm cov kab me me. Txoj kev no muab cov txiaj ntsig zoo hauv kev tswj cov kab tsuag thiab tiv thaiv nplooj.
Tswj cov kab npauj npaim jujube thiab apple codling moth, nrog rau cov kab npauj npaim pear codling moth. Thaum lub sijhawm uas cov kab npauj npaim laus tso qe thiab lub sijhawm uas cov kab menyuam noj txiv hmab txiv ntoo, tsuag cov tshuaj Bt emulsion (muaj 0.2% synthetic pyrethroid) ntawm qhov concentration ntawm 500-600 zaug ua ntej cov kab menyuam tawm tsam cov txiv hmab txiv ntoo. Txoj kev no muab cov txiaj ntsig zoo hauv kev tua kab tsuag thiab tiv thaiv cov txiv hmab txiv ntoo.
Cov kev ceev faj
① Nws tsis tuaj yeem sib xyaw nrog cov tshuaj tua kab mob.
② Qhov chaw yug kab laug sab yuav tsum tsis txhob siv nws ntau li ntau tau kom tiv thaiv kev lom kab laug sab.
③ Bacillus thuringiensis ua haujlwm tau zoo thaum qhov kub siab (saum toj no 20 ℃). Nws yog ib qho zoo kom siv nws txij lub Rau Hli mus txog rau lub Cuaj Hli.
④ Cov tshuaj no yooj yim nqus dej thiab yuav ua rau muaj pob. Yuav tsum khaws cia rau hauv qhov chaw kaw, qhuav thiab txias.
Lub sijhawm tshaj tawm: Lub Ob Hlis-27-2026