2024 Tus sau: Chloe Blomfield | [email protected]. Kawg hloov kho: 2023-12-15 23:55
Peb hlub peb cov txiv apples thiab loj hlob koj tus kheej yog qhov kev xyiv fab tab sis tsis muaj qhov nyuaj. Ib kab mob uas feem ntau cuam tshuam rau txiv apples yog Phytophthora dab tshos rot, kuj hu ua crown rot lossis dab tshos rot. Txhua hom pob zeb thiab pome txiv hmab txiv ntoo yuav raug kev txom nyem los ntawm cov txiv hmab txiv ntoo hauv paus rot, feem ntau yog thaum cov ntoo nyob rau hauv lawv cov txiv hmab txiv ntoo loj hlob xyoo ntawm hnub nyoog 3-8 xyoo. Dab tsi yog cov cim qhia ntawm cov cag rot hauv cov txiv apples thiab puas muaj Phytophthora kho rau txiv apples?
Apple Tree Root Rot Symptoms
Cov kab mob apple tsob ntoo hu ua crown rot yog tshwm sim los ntawm Phytophthora cactorum, uas kuj tawm tsam pears. Qee cov cag ntoo muaj qhov cuam tshuam rau tus kab mob ntau dua li lwm tus, nrog cov cag ntoo dwarf yog qhov yooj yim tshaj plaws. Nws feem ntau pom nyob rau hauv qhov chaw qis ntawm cov av tsis zoo.
Cov tsos mob ntawm cov hauv paus rot hauv cov txiv apples tshwm nyob rau lub caij nplooj ntoo hlav thiab tau hais los ntawm kev ncua sijhawm ntawm cov paj tawg, cov nplooj tsis muaj xim, thiab twig tuag. Qhov taw qhia tshaj plaws ntawm cov txiv apples hauv paus rot yog girdling ntawm lub cev uas nyob rau hauv cov tawv ntoo browns thiab thaum ntub yuav slimy. Yog hais tias cov hauv paus hniav yuav tsum tau soj ntsuam, dej soaked necrotic ntaub so ntswg ntawm lub hauv paus ntawm cov hauv paus hniav yuav pom tseeb. Qhov chaw necrotic no feem ntau txuas mus rau hauvlub koom haum graft.
Phytophthora Apple Tree Root Rot Disease Cycle
Txiv hmab txiv ntoo hauv paus rot tshwm sim los ntawm cov kab mob fungal no tuaj yeem nyob hauv av tau ntau xyoo ua spores. Cov spores no tiv taus drought thiab tsawg dua, tshuaj lom neeg. Cov kab mob fungal tshwm sim nrog qhov kub thiab txias (ze li 56 degrees F. lossis 13 C.) thiab dej nag txaus. Yog li ntawd, qhov tshwm sim siab tshaj plaws ntawm cov txiv hmab txiv ntoo rot yog thaum lub sij hawm tawg paj hauv lub Plaub Hlis thiab thaum lub sij hawm dormancy pib thaum lub Cuaj Hli.
Collar rot, crown rot and root rot is all other names for Phytophthora disease thiab txhua tus hais txog cov cheeb tsam tshwj xeeb ntawm tus kab mob. Lub caj dab rot yog hais txog kev kis kab mob saum tsob ntoo koom ua ke, lub hauv paus rot mus rau kev kis kab mob ntawm cov hauv paus hauv paus thiab hauv qab lub cev, thiab cov hauv paus rot hais txog kev kis kab mob ntawm cov hauv paus hniav.
Phytophthora kho hauv apples
Tus kab mob no nyuaj rau tswj thiab thaum pom muaj kab mob, feem ntau nws yuav lig dhau los kho, yog li xaiv cov cag ntoo nrog kev saib xyuas. Txawm hais tias tsis muaj ib tug rootstock yog kiag li resistant rau crown rot, tsis txhob dwarf kua rootstocks, uas yog tshwj xeeb yog raug. Ntawm cov ntoo txiv apples, cov hauv qab no muaj qhov zoo lossis nruab nrab tiv thaiv tus kab mob:
- Lodi
- Grimes Golden thiab Duchess
- Zoo siab heev
- Jonathan
- McIntosh
- Rome Beauty
- Red Delicious
- Nyob zoo
- Winesap
Kuj tseem ceeb heev rau kev tawm tsam txiv hmab txiv ntoo hauv paus rot yog qhov chaw xaiv. Cog ntoo hauv txaj, yog tias ua tau, lossis tsawg kawg, tso dej tawm ntawm lub cev. Tsis txhob cog tsob ntoo nroglub koom haum graft hauv qab cov kab hauv av los yog cog rau hauv thaj chaw hnyav, cov av tsis zoo.
ceg txheem ntseeg lossis lwm yam txhawb nqa cov ntoo hluas. Huab cua cua tuaj yeem ua rau lawv pob zeb rov qab, ua rau lub qhov dej qhib nyob ib puag ncig tsob ntoo uas tuaj yeem sau dej, ua rau mob khaub thuas thiab dab tshos rot.
Yog tsob ntoo twb muaj kab mob lawm, yuav tsum muaj kev txwv txwv. Hais tias, koj tuaj yeem tshem tawm cov av ntawm lub hauv paus ntawm cov ntoo muaj kab mob kom nthuav tawm thaj chaw cankered. Cia thaj chaw no raug huab cua kom nws qhuav. Kev ziab tuaj yeem tiv thaiv kab mob ntxiv. Tsis tas li ntawd, tshuaj tsuag lub cev hauv qab nrog cov tshuaj tua kab mob tas li siv 2-3 tablespoons (60 mus rau 90 mL.) ntawm fungicide ib nkas loos (3.8 L.) dej. Thaum lub pob tw qhuav lawm, rov ua kom thaj chaw ib ncig ntawm lub pob tw nrog cov av tshiab thaum lub caij nplooj zeeg.
Hnub kawg, txo qhov zaus thiab qhov ntev ntawm cov dej, tshwj xeeb tshaj yog tias cov av zoo li saturated rau lub sijhawm ntev uas yog kev caw rau Phytophthora fungal kab mob thaum kub me ntsis, ntawm 60-70 degrees F. (15 -21 C.).
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