Ntau cov ntshauv nyiam kis thoob lub vaj thiab tsis tshua nco cov nroj tsuag. Dab tsi ntawm louse hom phiaj Douglas fir? Txawm li cas los xij, hom ntoo no tuaj txawv teb chaws kuj plagued los ntawm lwm cov kab me me. Lawv yog dab tsi thiab koj taug qab lawv li cas?
Puas yog kab tsuag tua Douglas fir?
Cov kab ntau tshaj plaws ntawm Douglas fir yog Douglas fir mealybugs thiab bark beetles. Mealybugs nqus ntawm cov koob, ua rau tsis muaj xim thiab koob poob, thaum bark beetles tua cov ntoo tsis muaj zog thiab overwinter nyob rau hauv cov tawv ntoo.
Cov kab ntau tshaj plaws
Nyob rau hauv thawj theem ntawm lub neej, nyob ib ncig ntawm 15 xyoo, Douglas firs muaj ntau raug kab mob thiab feem ntau raug tua los ntawm kab ntau tshaj cov laus. Cov kab tsuag loj tshaj plaws suav nrog:
- Douglas Mealybugs
- bark beetle
Tus Douglas fir mealybugs ua raws li Douglas fir, uas tuaj rau peb ntawm North America txog 200 xyoo dhau los, hla lub pas dej loj thiab tam sim no tau nthuav dav heev ntawm no thiab. Douglas fir sawfly yog lwm yam kab mob nkag teb chaws.
Lub luag haujlwm ntawm lub caij ntuj no Frost puas thiab kab mob fungal
Douglas fir tsis tshua muaj kab tsuag, tab sis yog tias nws tsis muaj zog los ntawm kev puas tsuaj los yog kab mob fungal, qhov tshwm sim ntawm kev kis kab mob nce ntxiv. Ob leeg ua ke tuaj yeem ua rau muaj kev puas tsuaj loj rau tsob ntoo kev noj qab haus huv thiab txawm ua rau nws tuag tag.
Douglas Mealybugs
Tus Douglas fir mealybug nyiam nqus cov koob ntawm tsob ntoo no, qhov tshwm sim sai sai yuav pom meej:
- koob khoov
- thawj discolorations ua pom
- Tau kawg koob poob tshwm sim
Yog tsob ntoo tseem raug kev txom nyem los ntawm Sooty Douglas Fir, kev poob koob tuaj yeem mob hnyav heev uas nws tsis tuaj yeem rov zoo dua.
Tip
Koj tuaj yeem paub qhov kab mob mealybug tau yooj yim yog tias koj saib ze dua ntawm cov koob ntawm Douglas fir. Cov kab no tawm dawb, hmoov me me rau ntawm lawv.
Control Measures
Mealybugs feem ntau yog tswj nrog cov tshuaj tua kab pom zoo. Cov tshuaj hauv tsev feem ntau siv hauv vaj tsev tsis tshua muaj txiaj ntsig thiab siv tsis yooj yim rau kev xyaum ntawm cov ntoo loj.
Txhawm rau tiv thaiv kab tsuag ua ntej, koj yuav tsum ntxiv dag zog rau koj cov ntoo hluas. Nettle manure thiab horsetail broth yog ob lub ntuj tonics uas leej twg tuaj yeem ua rau lawv tus kheej yooj yim.
bark beetle
Ntau thiab ntau hom kab tsuag yog nrhiav tau Douglas fir, suav nrog bark beetles. Tshwj xeeb tshaj yog thaum tsob ntoo tsis muaj zog los ntawm cov kab mob fungal lossis cov kab mob tsis zoo, cov kab no nyiam tua nws.
- Pest hibernates under the bark
- thawj kab yuav pom thaum nruab nrab lub Plaub Hlis
- pab tawm ntawm sab sauv ntawm lub crown
- Tuag, koob liab liab yog qhov tshwm sim
Cov ntoo raug kab mob yuav tsum tau txiav kom sai li sai tau, txwv tsis pub cov kab tsuag tuaj yeem kis mus rau lwm tsob ntoo.
