Erin Lizotte, Michigan State University Extension, MSU Department of Entomology Dave Smitley thiab Jill O'Donnell, MSU Extension-Plaub Hlis 1, 2015
Spruce kab laug sab mites yog cov kab tsuag tseem ceeb ntawm Michigan Christmas ntoo.Kev siv tshuaj tua kab tsawg tsawg tuaj yeem pab cov neeg cog qoob loo tiv thaiv cov kab mob uas muaj txiaj ntsig zoo, yog li pab tswj cov kab tsuag tseem ceeb no.
Hauv Michigan, spruce kab laug sab mite (Oligonuchus umunguis) yog ib qho tseem ceeb ntawm cov ntoo coniferous.Cov kab me me no cuam tshuam tag nrho cov khoom lag luam tsim Christmas ntoo thiab feem ntau ua rau poob nyiaj txiag loj hauv kev cog qoob loo ntawm spruce thiab Fraser fir.Nyob rau hauv ib txwm tswj kev cog qoob loo, cov pej xeem ntawm cov kab mob predatory me me vim yog siv cov tshuaj tua kab, yog li kab laug sab mites feem ntau yog kab tsuag.Predatory mites muaj txiaj ntsig zoo rau cov neeg cog qoob loo vim tias lawv noj cov kab tsuag thiab pab tswj cov pej xeem.Yog tsis muaj lawv, cov pej xeem spruce kab laug sab mite yuav tawg sai sai, ua rau cov ntoo puas.
Raws li lub caij nplooj ntoos hlav mus txog, cov neeg cog qoob loo yuav tsum tau npaj kom lawv cov phiaj xwm tua tsiaj.Txhawm rau pom cov kab laug sab mites, cov neeg cog qoob loo yuav tsum coj ntau tsob ntoo hauv txhua qhov cog thiab nco ntsoov xaiv ntoo los ntawm qhov siab sib txawv thiab kab hauv tsev thiab sab nraum zoov.Cov qauv ntoo loj dua yuav ua rau muaj qhov tseeb ntawm cov neeg cog qoob loo thaum ntsuas cov pej xeem thiab muaj peev xwm txaus ntshai.Kev soj ntsuam xyuas yuav tsum tau ua txhua lub caij nyoog, tsis yog tom qab cov tsos mob tshwm sim, vim tias feem ntau nws lig dhau rau kev kho mob zoo.Txoj hauv kev yooj yim tshaj plaws los txheeb xyuas cov neeg laus thiab cov menyuam yaus yog co lossis tuav cov ceg ntoo ntawm lub rooj tsav xwm saib xyuas lossis ntawv (duab 1).
Spruce kab laug sab mite qe yog lub pob liab me me nrog cov plaub hau nyob nruab nrab.Cov qe hatched yuav pom tseeb (duab 2).Nyob rau hauv lub ce, kab laug sab mite yog heev me me thiab muaj ib tug mos mos lub cev zoo li.Tus neeg laus spruce kab laug sab mite yog lub cev oval zoo nrog cov plaub hau saum lub plab.Cov tawv nqaij tones sib txawv, tab sis Tetranychus spruce feem ntau yog ntsuab, tsaus ntsuab los yog yuav luag dub, thiab yeej tsis dawb, liab los yog lub teeb liab.Cov kab mob uas muaj txiaj ntsig zoo feem ntau yog dawb, mis nyuj dawb, liab dawb los yog lub teeb liab, thiab lawv tuaj yeem txawv ntawm cov kab tsuag los ntawm kev saib xyuas lawv cov dej num.Thaum muaj kev ntxhov siab, cov neeg laus predatory mites feem ntau txav nrawm dua li cov kab tsuag kab, thiab nws tuaj yeem pom kom txav mus sai rau ntawm pawg saib xyuas.Liab spruce kab laug sab yuav nkag mus maj mam.
Yees duab 2. Cov neeg laus spruce kab laug sab mites thiab qe.Duab qhov chaw: USDA FS-Northeast Regional Archives, Bugwood.org
Cov tsos mob ntawm spruce kab laug sab mite puas muaj xws li chlorosis, koob pricks thiab discoloration thiab txawm xim av nplooj thaj ua rau thaj, uas nws thiaj li kis mus rau tag nrho cov ntoo.Thaum soj ntsuam qhov raug mob los ntawm daim iav tes, cov tsos mob tshwm sim me me daj puag ncig ntawm qhov chaw pub mis (duab 3).Los ntawm kev saib xyuas kom zoo, kev tswj hwm kev tiv thaiv thiab kev siv cov tshuaj tua kab uas tsis tshua muaj kev phom sij rau cov tsiaj nyeg tsiaj qus, spruce kab laug sab mites tuaj yeem tiv thaiv kom tsis txhob raug puas tsuaj.Txoj hauv kev yooj yim tshaj plaws los txiav txim siab txog kev tswj hwm kev xav tau yog los soj ntsuam seb qhov kev tshawb xyuas qhia tau tias cov pej xeem loj hlob los yog nyob rau theem ntawm kev puas tsuaj.Nws yog ib qho tseem ceeb kom nco ntsoov tias spruce kab laug sab mite cov pej xeem hloov pauv sai, yog li tsuas yog saib qhov kev puas tsuaj rau tsob ntoo tsis qhia meej tias yuav tsum tau kho li cas, vim tias cov pej xeem uas tau tuag txij thaum ntawd los yuav ua rau muaj kev puas tsuaj, yog li tshuaj tsuag tsis muaj nuj nqis. .
Yees duab 3. Spruce kab laug sab mite noj koob puas lawm.Duab credit: John A. Weidhass ntawm Virginia Tech thiab State University Bugwood.org
Cov lus hauv qab no muaj cov kev xaiv kho mob tam sim no, lawv cov tshuaj lom neeg, lub hom phiaj ntawm lub neej theem, kev ua tau zoo ntawm cov txheeb ze, tswj lub sijhawm thiab txheeb ze tshuaj lom rau cov kab mob uas muaj txiaj ntsig zoo.Yog tias tsis siv tshuaj tua kab, kab laug sab liab tsis tshua muaj teeb meem, vim tias cov kab mob predatory yuav ua rau lawv tswj tau.Sim kom tsis txhob tsuag tshuaj tua kab kom txhawb kev tswj hwm ntuj.
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Avid 0.15EC, Ardent 0.15EC, pob tshab kho kom zoo nkauj, Nufarm Abamectin, Minx Quali-Pro Abamectin 0.15EC, Timectin 0.15ECT&O (abamectin)
Txaus siab rau Pro, Couraze 2F, Couraze 4F, Mallet 75WSP, Nuprid 1.6F, Pasada 1.6F, Prey, Provado 1.6F, Sherpa, Poj ntsuam, Wrangler (imidacloprid)
1 Cov ntawv txav muaj xws li mite larvae, nymphs thiab cov neeg laus theem.2S kuj muaj kev nyab xeeb rau mite predators, M yog tshuaj lom, thiab H yog tshuaj lom heev.3Avermectin, thiazole thiab tetronic acid acaricides qeeb qeeb, yog li cov neeg cog qoob loo yuav tsum tsis txhob xav tsis thoob yog tias cov mites tseem muaj sia nyob tom qab siv.Nws yuav siv sij hawm 7 mus rau 10 hnub kom pom tag nrho cov neeg tuag.4 Cov roj cog tuaj yeem ua rau phytotoxicity, tshwj xeeb tshaj yog thaum siv rau lub caij ntuj sov, thiab tuaj yeem txo cov xim xiav hauv spruce xiav.Nws yog feem ntau muaj kev nyab xeeb los tsuag cov roj ua kom zoo nkauj zoo nkauj nrog lub siab ntawm 1% txhua lub sijhawm ntawm lub xyoo, tab sis thaum qhov concentration yog 2% lossis siab dua, nws tuaj yeem ua rau cov paj tawg los ntawm kev hloov pauv ntawm cov dej khov nab kuab thiab ua rau muaj cov tsos mob tsis zoo. ..5 Apollo daim ntawv lo yuav tsum tau nyeem thiab ua tib zoo ua raws li kev siv kom raug thiab ua rau kev loj hlob ntawm kev tiv thaiv.
Pyrethroids, organophosphates thiab abamectins txhua tus muaj kev ua haujlwm zoo knockdown thiab seem tswj ntawm spruce kab laug sab mites nyob rau hauv lub neej active theem, tab sis lawv ua rau tuag taus ntawm predatory mites ua rau lawv tsis zoo txoj kev kho mob.Vim qhov txo qis ntawm cov yeeb ncuab ntuj thiab cov neeg tua tsiaj, cov kab laug sab spruce mites cov pejxeem tawg, kev siv cov ntaub ntawv no feem ntau yuav tsum tau ua tiav rau lub caij no.Neonicotine, uas muaj imidacloprid ua cov khoom muaj txiaj ntsig, kuj yog ib qho kev xaiv tsis zoo rau kev tswj cov kab laug sab mites, thiab qee zaum kuj yuav ua rau muaj kab laug sab mites.
Piv nrog rau cov ntaub ntawv hais saum toj no, carbamates, quinolones, pyridazinones, quinazolines thiab kab kev loj hlob regulator ethoxazole tag nrho qhia cov txiaj ntsig zoo ntawm Tetranychus spruce thiab nruab nrab rau cov tsiaj txhu.tshuaj lom.Kev siv cov ntaub ntawv no yuav txo qhov kev pheej hmoo ntawm kab mob mite thiab muab peb mus rau plaub lub lis piam ntawm kev tswj qhov seem rau txhua theem ntawm lub neej ntawm spruce kab laug sab mites, tab sis etozol muaj kev txwv rau cov neeg laus.
Tetronic acid, thiazole, sulfite thiab horticultural roj kuj qhia tau zoo los ntawm qhov seem ntawm kab laug sab mite.Horticultural roj muaj kev pheej hmoo ntawm phytotoxicity thiab chlorosis, yog li cov neeg cog qoob loo yuav tsum tau ceev faj thaum siv cov khoom tshiab los yog cov tsiaj tsis kho.Tetronic acid, thiazole, sulfite thiab horticultural roj kuj tseem muaj cov txiaj ntsig tseem ceeb ntxiv, uas yog, nws muaj kev nyab xeeb rau cov kab mob mites thiab muaj peev xwm ua rau muaj kab mob mite.
Cov neeg cog qoob loo yuav pom tau tias yuav tsum muaj ntau tshaj ib qho kev kho mob, tshwj xeeb tshaj yog thaum cov pej xeem siab siab, lossis thaum siv tshuaj tua kab uas tsis muaj txiaj ntsig ntawm txhua theem ntawm lub neej.Thov nyeem daim ntawv lo ua tib zoo, vim qee cov khoom siv tsuas yog siv rau hauv ib hom rau ib lub caij.Thaum ntxov caij nplooj ntoos hlav, xyuas cov koob thiab twigs rau qe ntawm Tetranychus spruce.Yog tias cov qe muaj ntau, siv cov roj horticultural ntawm qhov concentration ntawm 2% los tua lawv ua ntej hatching.Cov roj ua vaj zoo nkauj nrog cov ntsiab lus ntawm 2% muaj kev nyab xeeb rau cov ntoo Christmas feem ntau, tshwj tsis yog xiav spruce, uas poob qee qhov xiav luster tom qab tau txau nrog cov roj.
Txhawm rau ncua kev txhim kho cov tshuaj tiv thaiv acaricides, Michigan State University Promotion Department txhawb cov neeg cog qoob loo kom ua raws li cov lus pom zoo ntawm daim ntawv lo, txwv cov khoom siv tshwj xeeb siv rau qee lub caij, thiab xaiv cov tshuaj acaricides los ntawm ntau tshaj ib cov tshuaj tua kab.Piv txwv li, raws li cov pej xeem pib rov zoo, cov neeg cog qoob loo tuaj yeem cog cov roj dormant nyob rau lub caij nplooj ntoo hlav thiab tom qab ntawd siv tetronic acid.Daim ntawv thov tom ntej yuav tsum yog los ntawm ib pawg uas tsis yog tetrahydroacid.
Cov kev cai tshuaj tua kab hloov tas li, thiab cov ntaub ntawv muab hauv tsab xov xwm no yuav tsis hloov cov lus qhia ntawm daim ntawv lo.Txhawm rau tiv thaiv koj tus kheej, lwm tus thiab ib puag ncig, thov nco ntsoov nyeem thiab ua raws li daim ntawv lo.
Cov ntaub ntawv no yog raws li kev ua haujlwm txhawb nqa los ntawm National Institute of Food and Agriculture ntawm Tebchaws Meskas Lub Tsev Haujlwm Saib Xyuas Kev Ua Liaj Ua Teb raws li kev pom zoo tus lej 2013-41534-21068.Txhua qhov kev xav, kev tshawb pom, cov lus xaus, lossis cov lus pom zoo uas tau hais hauv tsab ntawv tshaj tawm no yog cov neeg sau thiab tsis tas yuav cuam tshuam txog kev xav ntawm Tebchaws Meskas Lub Tsev Haujlwm Saib Xyuas Kev Ua Liaj Ua Teb.
Kab lus no tau txuas ntxiv thiab luam tawm los ntawm Michigan State University.Yog xav paub ntxiv, thov mus saib https://extension.msu.edu.Txhawm rau xa cov lus xaus ncaj qha rau koj tus email inbox, thov mus saib https://extension.msu.edu/newsletters.Hu rau cov kws tshaj lij hauv koj cheeb tsam, thov mus saib https://extension.msu.edu/experts lossis hu rau 888-MSUE4MI (888-678-3464).
Lub Tsev Kawm Ntawv Tshawb Fawb muaj 22 lub vev xaib los ntawm cov kws tshaj lij tiv thaiv qoob loo los ntawm 11 lub tsev kawm qib siab hauv Midwest, muab los ntawm CPN.
Michigan State University yog ib qho kev lees paub, tus tswv haujlwm sib npaug, cog lus los txhawb txhua tus kom ua tiav lawv lub peev xwm los ntawm ntau haiv neeg ua haujlwm thiab kev coj noj coj ua kom ua tau zoo.
Michigan State University cov phiaj xwm nthuav dav thiab cov ntaub ntawv qhib rau txhua tus, tsis hais haiv neeg, xim, lub tebchaws tuaj, poj niam txiv neej, poj niam txiv neej, kev ntseeg, hnub nyoog, qhov siab, qhov hnyav, kev tsis taus, kev ntseeg, kev coj noj coj ua, kev sib deev, kev txij nkawm, tsev neeg, lossis nyiaj laus. Tub rog xwm txheej.Hauv kev koom tes nrog Asmeskas Lub Tsev Haujlwm Saib Xyuas Kev Ua Liaj Ua Teb, nws tau tshaj tawm los ntawm MSU nce qib txij lub Tsib Hlis 8 txog rau Lub Rau Hli 30, 1914. Quentin Tyler, Tus Thawj Coj Ib ntus, MSU Development Department, East Lansing, Michigan, MI48824.Cov ntaub ntawv no yog rau kev kawm nkaus xwb.Kev hais txog cov khoom lag luam lossis cov npe lag luam tsis txhais tau tias lawv tau txais kev pom zoo los ntawm MSU Extension lossis cov khoom nyiam tsis tau hais.