Qhov kub thiab txias uas peb tau muaj tau ua rau thrips thiab tsawg dua ob qhov pom kab laug sab mite, TSSM (Tetranychus urticae) cov pejxeem kom nce sai hauv qee cov zaub hauv Maryland.
Cov kab no pub los ntawm punncturing txheej txheej ntawm cov ntaub so ntswg thiab nqus tawm ntawm tes, uas ua rau stippling, discolored flecking, los yog silvering ntawm nplooj nplooj (Fig.1). Peb yuav tham feem ntau txog thrips lub sijhawm no raws li kuv tau hais txog TSSMs hauv ib tsab xov xwm dhau los. Kev pub thrips feem ntau yog nrog cov flecks dub ntawm frass (thrips poop) (Fig. 1a), thaum mite poop yog dawb los yog ntshiab.
Ob kab no tuaj yeem ua kom tsis muaj xim thiab caws pliav nplooj, paj, thiab txiv hmab txiv ntoo nto, thiab cuam tshuam cov nroj tsuag thiab, nyob rau hauv cov ntaub ntawv ntawm thrips, vector nroj tsuag pathogens. Muaj ntau hom zaub thrips uas feem ntau yog Eastern paj thrips, Frankliniella tritici, Tobacco thrips Frankliniella fusca, Western paj thrips, F. occidentalis thiab Dos thrips Thrips tabaci. Peb hom kawg yog cov uas yuav kis tus kab mob lws suav uas muaj kab mob virus, TSWV.
Kev pub thrips ua rau ntau cov ntaub so ntswg teb, nrog rau kev tsim caws pliav thiab kev loj hlob tsis zoo (daim duab 2). Cov poj niam ntawm feem ntau cov nroj tsuag pub tsiaj nteg lawv lub raum zoo li lub qe ntawm los yog rau hauv cov ntaub so ntswg (qhov kev tso kawm tom kawg no ua rau nws tsis yooj yim sua kom pom cov qe ntawm cov nroj tsuag). Thrips hatch los ntawm lub qe thiab loj hlob mus rau hauv ob theem larval thiab tom qab ntawd lub 'prepupa thiab pupa' theem, ua ntej ua ib tug neeg laus.
Prepupae thiab pupae ntawm feem ntau hom poob rau hauv av los yog nplooj litter kom pupate. Thrips muaj ntau tiam (mus txog yim) ib xyoos. Thaum huab cua sov, lub neej voj voog yuav luv li 2 lub lis piam.
Thrips thresholds rau zaub yog: paj ntawm lws suav, kua txob los yog watermelon tuaj yeem zam tau 5 thrips / paj uas tsis muaj teeb meem kev loj hlob ntawm txiv hmab txiv ntoo. Squash thiab taub dag paj tuaj yeem tiv taus 5-10 thrips / paj uas tsis cuam tshuam rau cov txiv hmab txiv ntoo zoo. Ib lossis ob daim ntawv thov ntawm pyrethroid lossis neonic lossis spinosad (saib 2020/2021 Mid-Atlantic Commercial Vegetable Production Recommendation phau ntawv qhia) thov nrog dej txaus (60-80 gal / a, koj yuav tsum muaj kev pabcuam zoo) yuav tsum tswj cov kab mob thrips feem ntau.
Rau ob qhov pom kab laug sab mites Agri-Mek tau pom cov txiaj ntsig zoo heev txawm tias cov tshuaj tsuag tsis txaus. Muaj ob peb lwm yam tshuaj miticides xws li Acramite uas tseem yuav muab kev tswj xyuas zoo ntawm TSSM thiab tuaj yeem pom hauv cov lus pom zoo. Nco ntsoov siv tshuaj tua kab thaum muv yuav tsis ua haujlwm hauv thaj teb.
Ib txhia ntawm cov pejxeem ntawm thrips thiab mites nyob rau hauv lub teb tam sim no yog tej zaum tshwm sim ntawm transplants uas tau maj mam kis nrog cov kab no. Cov kab mob no feem ntau muaj cov tsis paub tab, uas yog ib qho nyuaj rau pom los yog qe uas tsuas yog nrhiav tsis tau yog tias lawv pw hauv cov ntaub so ntswg (thrips) los yog tsuas muaj ob peb ntawm lawv nyob rau hauv qab ntawm nplooj hauv crevices (mites).
Cov kev tshawb fawb kuv tau ua qhia tias yog tias koj kho koj cov kev hloov pauv (tshwj xeeb yog txiv lws suav) nrog 2 daim ntawv thov ntawm cov tshuaj tua kab mob (0.5-1% ntawm ntim) nrog rau thawj daim ntawv thov tuaj 7-10 hnub ua ntej cog thiab 2.nd tuaj 1-2 hnub (los yog ib daim ntawv qhia cov lus qhia) ua ntej koj mus rau hauv lub teb, koj yuav luag tshem tawm tej thrips los yog ob pom kab laug sab mite teeb meem uas pib los ntawm koj hloov.
Thaum lub caij txau ntau dua 3-4 zaug rau thrips lossis ob kab kab laug sab mites hauv thaj teb dhau 4-5 lub lis piam nrog kev tswj me me yuav ua rau muaj teeb meem loj dua. Qhov no yog vim hais tias cov tshuaj tsuag yuav txo tau tag nrho cov kab tsuag 'natural yeeb ncuab, tab sis tsis yog cov thrips los yog TSSM uas tej zaum yuav muaj kev tiv thaiv rau cov tshuaj tua kab. Thaum koj siv tshuaj tua kab lossis tshuaj tua kab mob koj yuav tsum ntsuas seb nws ua haujlwm tau zoo npaum li cas los ntawm kev tshawb nrhiav thaj chaw dua ob peb hnub tom qab daim ntawv thov. Yog tias cov kab tsuag tseem muaj zog heev koj yuav tsum rov ntsuam xyuas qhov tau thov thiab siv nws li cas.
Hu rau koj tus kws qhia ntawv hauv nroog lossis tus kws paub txog qoob loo kom tau txais kev pab hauv kev ntsuam xyuas.
- Jerry Brust, IPM Vegetable Specialist, University of Maryland
Daim duab 2 rau saum. Kua txob nplooj distortions vim thrips noj.