Tshuaj lom tsawg, tsis muaj cov khoom seem ntsuab cog kev loj hlob regulator - prohexadione calcium

Prohexadione yog ib hom tshuaj tshiab uas tswj kev loj hlob ntawm cov nroj tsuag ntawm cyclohexane carboxylic acid. Nws tau tsim ua ke los ntawm Nyiv Pooj Combination Chemical Industry Co., Ltd. thiab lub teb chaws Yelemees BASF. Nws inhibits lub biosynthesis ntawm gibberellin hauv cov nroj tsuag thiab ua rau cov nroj tsuag Cov gibberellin cov ntsiab lus raug txo, yog li ntawd qeeb thiab tswj kev loj hlob ntawm cov nroj tsuag. Feem ntau siv rau hauv cov qoob loo cereal, xws li nplej, barley, mov lodging tsis kam, kuj tseem siv tau rau hauv txiv laum huab xeeb, paj thiab nyom kom tswj lawv txoj kev loj hlob.

1 Kev Taw Qhia Txog Khoom

Lub npe Suav: procyclonic acid calcium

Lub npe lus Askiv: Prohexadione-calcium

Lub npe sib xyaw: calcium 3-oxo-5-oxo-4-propionylcyclohex-3-enecarboxylate

CAS tus lej nkag: 127277-53-6

Cov mis mos molecular: C10H10CaO5

Qhov hnyav ntawm cov molecular: 250.3

Cov qauv qauv:

Cov khoom siv lub cev thiab tshuaj lom neeg: Qhov tsos: hmoov dawb; melting point > 360 ℃; vapor pressure: 1.74 × 10-5 Pa (20 ℃); octanol/dej faib coefficient: Kow lgP = -2.90 (20 ℃); ceev: 1.435 g / mL; Henry's tas mus li: 1.92 × 10-5 Pa m3mol-1 (calc.). Solubility (20 ℃): 174 mg / L hauv dej distilled; methanol 1.11 mg / L, acetone 0.038 mg / L, n-hexane ＜0.003 mg / L, toluene 0.004 mg / L, ethyl acetate ＜0.010 mg / L, iso Propanol 0.105 mg / L, dichloromethane 0.004 mg / L. Kev ruaj khov: kub ruaj khov txog li 180 ℃; hydrolysis DT50 <5 d (pH = 4, 20 ℃), 21 d (pH7, 20 ℃), 89 d (pH9, 25 ℃); hauv dej ntuj, dej photolysis DT50 yog 6.3 d, lub photolysis DT50 hauv dej distilled yog 2.7 d (29 ~ 34 ℃, 0.25W / m2).

Kev Lom Zem: Cov tshuaj thawj ntawm prohexadione yog cov tshuaj tua kab uas tsis muaj tshuaj lom. Qhov mob hnyav LD50 (txiv neej / poj niam) ntawm cov nas yog> 5,000 mg / kg, qhov mob hnyav percutaneous LD50 (txiv neej / poj niam) ntawm cov nas yog> 2,000 mg / kg, thiab qhov mob hnyav LD50 ntawm cov nas (txiv neej / poj niam) yog> 2,000 mg / kg. Kev lom zem ntawm kev ua pa LC50 (4 teev, txiv neej / poj niam)> 4.21 mg / L. Tib lub sijhawm, nws muaj kev lom zem tsawg rau cov kab mob ib puag ncig xws li noog, ntses, cov kab dej, algae, muv, thiab cov kab mob hauv av.

Txoj kev ua haujlwm: Los ntawm kev cuam tshuam rau kev tsim cov gibberellic acid hauv cov nroj tsuag, nws txo cov ntsiab lus ntawm gibberellic acid hauv cov nroj tsuag, tswj kev loj hlob ntawm cov ceg, txhawb kev tawg paj thiab txiv hmab txiv ntoo, nce cov qoob loo, tsim cov hauv paus hniav, tiv thaiv cov cell membranes thiab organelle membranes, thiab txhim kho kev tiv thaiv kev ntxhov siab ntawm cov qoob loo. Yog li ntawd, thiaj li tiv thaiv kev loj hlob ntawm cov nroj tsuag sab saud thiab txhawb kev loj hlob ntawm kev yug me nyuam.

2 Kev Sau Npe

Raws li kev nug ntawm Tuam Tshoj Cov Ntaub Ntawv Txog Tshuaj Tua Kab, txij li Lub Ib Hlis 2022, tag nrho ntawm 11 cov khoom lag luam prohexadione calcium tau raug sau npe hauv kuv lub tebchaws, suav nrog 3 cov tshuaj siv thiab 8 cov tshuaj npaj, raws li qhia hauv Rooj 1.

Rooj 1 Kev sau npe ntawm prohexadione calcium hauv kuv lub tebchaws

3 Kev cia siab ntawm kev ua lag luam

Ua ib qho tshuaj tswj kev loj hlob ntawm cov nroj tsuag ntsuab, prohexadione calcium zoo ib yam li cov tshuaj tswj kev loj hlob ntawm cov nroj tsuag ntawm paclobutrazol, niconazole thiab trinexapac-ethyl. Nws inhibits qhov biosynthesis ntawm gibberellic acid hauv cov nroj tsuag, thiab ua lub luag haujlwm hauv kev ua kom cov qoob loo dwarfing, Lub luag haujlwm ntawm kev tswj kev loj hlob ntawm cov nroj tsuag. Txawm li cas los xij, prohexadione-calcium tsis muaj cov seem ntawm cov nroj tsuag, tsis muaj kuab paug rau ib puag ncig, thiab tsawg dua cuam tshuam rau cov qoob loo tom ntej thiab cov nroj tsuag tsis yog lub hom phiaj. Nws tuaj yeem hais tias nws muaj kev cia siab dav heev.