Txhawm rau kom txo qis kev puas tsuaj los ntawm kab tsuag rau cov qoob loo, peb tau tsim ntau ntawm cov tshuaj tua kab sib txawv. Tus txheej txheem ntawm kev ua ntawm ntau yam tshuaj tua kab yog tib yam, yog li peb xaiv qhov twg uas tsim nyog rau peb cov qoob loo? Niaj hnub no peb yuav tham txog Ob qho tshuaj tua kab nrog cov qauv zoo sib xws ntawm kev nqis tes ua ： imidacloprid thiab thiamethoxam.
Peb cov ua liaj ua teb tau paub nrog imidacloprid, yog li thiamethoxam yog lub hnub qub tshiab rau lub hnub qub. Nws qhov zoo dua rau kev ua haujlwm laus dua yog li cas?
01. Kev txheeb xyuas qhov sib txawv ntawm imidacloprid thiab thiamethoxam
Txawm hais tias ob lub txheej txheem ntawm kev ua haujlwm zoo sib xws (muaj peev xwm xaiv tau thaiv cov kab hauv nruab nrab cov hlab ntsha nicotinic acid acetylcholinesterase receptor, yog li thaiv cov kab kev ua haujlwm ntawm kab nruab nrab lub paj hlwb, ua rau tuag tes tuag taw thiab tuag ntawm kab tsuag), thiamethoxam muaj 5 qhov txiaj ntsig zoo:
Thiamethoxam tseem ua haujlwm ntau dua
Lub ntsiab metabolite ntawm thiamethoxam hauv kab yog fabricianidin, uas muaj kev sib txuam ntau dua rau cov kab mob acetylcholine receptors dua li thiamethoxam, yog li nws muaj ntau dua cov kev ua kom zoo;
Cov kev ua ntawm hydroxylated metabolites ntawm imidacloprid tau txo qis.
Thiamethoxam muaj solubility siab hauv dej
Lub solubility ntawm thiamethoxam hauv dej yog 8 lub sij hawm uas ntawm imidacloprid, yog li txawm tias nyob hauv qhov chaw qhuav, nws tsis cuam tshuam rau qhov nqus thiab siv thiamethoxam los ntawm cov nplej.
Cov kev tshawb fawb pom tau tias hauv ib qho av noo noo, thiamethoxam qhia tau tias muaj kev tswj hwm zoo ib yam li imidacloprid; tab sis nyob rau hauv lub ntuj qhuav heev, nws yog qhov zoo dua imidacloprid.
Tsawg thiamethoxam tsis kam
Txij li thaum imidacloprid tau nyob rau hauv kev ua lag luam rau ze li 30 xyoo, txoj kev loj hlob ntawm cov tshuaj tiv thaiv kab tsuag tau nce zuj zus.
Raws li cov lus ceeb toom, cov xim av daj cua daj, paj rwb aphid, thiab chive larval yoov tshaj cum tau tsim qee yam ua rau nws.
Txoj kev pheej hmoo ntawm cov ntoo khaub lig-cuam tshuam ntawm thiamethoxam thiab imidacloprid ntawm cov xim cog planthoppers, paj rwb aphids thiab lwm yam kab tsuag muaj tsawg heev.
Thiamethoxam tuaj yeem txhim kho cov qoob loo tiv thaiv kab mob thiab txhawb kev cog qoob loo
Thiamethoxam muaj qhov zoo uas lwm cov tshuaj tua kab tsis tuaj yeem sib phim, uas yog, nws muaj cov txiaj ntsig ntawm kev txhawb nqa cov hauv paus hniav thiab cov noob muaj zog.
Cov kev tshawb fawb pom tau tias Thiamethoxam tuaj yeem ua kom cov nroj tsuag tiv thaiv kev ntxhov siab, thiab tib lub sijhawm tsim cov auxin, cytokinin, gibberellin, abscisic acid, peroxidase, polyphenol oxidase, thiab phenylalanine ammonia lyase hauv cov nroj tsuag. Yog li ntawd, thiamethoxam nyob rau hauv lem ua rau cov qoob loo qia thiab cag ntau khov thiab ua kom muaj kev ntxhov siab tiv thaiv kev ntxhov siab.
Thiamethoxam kav ntev dua
Thiamethoxam muaj cov nplooj ua kom muaj zog thiab cov cag ntoo muaj zog, thiab tus neeg sawv cev tuaj yeem ua haujlwm nrawm thiab nqus tau.
Thaum nws ua ntawv thov rau cov av lossis noob, thiamethoxam yog nqus tau sai heev los ntawm cov hauv paus hniav los yog cov paj ntoo tuaj tshiab, thiab thauj mus rau txhua qhov chaw ntawm tsob ntoo lub cev los ntawm xylem hauv tsob ntoo lub cev. Nws nyob qis hauv tsob nroj cev rau lub sijhawm ntev thiab ua rau qeeb qeeb. Qhov kev puas tsuaj ntawm cov khoom siv khaub hlabianidin muaj ntau dua cov tshuaj tua kab, yog li thiamethoxam muaj qhov ua kom ntev dua li ntawm imidacloprid.
Lub sij hawm tshaj tawm: Lub Ib Hlis-11-2021