" Sky Pencil " holly ( Ilex crenata " Sky Pencil " ) , a cultivar of Japanese holly , has a distinctive tall , columniform shape that works especially well for narrow space such as entree . It grow in U.S.
" Sky Pencil " holly ( Ilex crenata " Sky Pencil " ) , a cultivar of Japanese holly , has a classifiable magniloquent , columnar shape that works specially well for narrow spaces such as entryways . It grows in U.S. Department of Agriculture flora hardiness zone 6 through 8 , and grow easily in well - draining dirt that receive full Lord’s Day to fond shade . While " Sky Pencil " holly does n’t need significant maintenance , this evergreen plant is susceptible to several diseases that can stunt its increase or pour down it . Being capable to discover the most common disease means you’re able to set forth treatment quickly .
Black Root Rot
opprobrious root rot , triggered by the fungus Thielaviopsis basicola in " Sky Pencil " holly and other Japanese holly , attack the root system . dissemble plants have dark brown to black source where the fungus is raise in or on the root tissue . Areas where the roots have begun to decay also come out discolored . The plant life often show sign of decline over the course of instruction of several months and normally become flat during or just after dry periods . The fungal spores can continue in the dirt for years , especially if the ground is dampish and frigid . The spore are carried by malarkey , water , garden equipment and infected plant . If you ’ve lost " Sky Pencil " holly institute to black origin rot , use the surface area for other shrubs that are repellent to the disease . To prevent blackened root rot , plant in well - drain soil or plant the Buddy Holly in upgrade beds .
Botryosphaeria Canker
Botryosphaeria canker unremarkably affects " Sky Pencil " Buddy Holly and other Japanese holly cultivar that have been exposed to extremely low or eminent temperatures or have experience extreme drouth conditions . hefty plant life do n’t normally have problem with this disease . Early symptoms admit yellow and dropping of the leave and dieback of the branchlet . canker sore also appear as sunken , cracked areas of brown or black stain on the twig bark . The tissue palisade the canker can also become discolored and bark may fall off . To treat a " Sky Pencil " holly industrial plant with Botryosphaeria canker sore , prune the affected twigs and burn down the infected pieces , if potential . Disinfect the pruning tools by soak them in a result of 1 part household bleach to 9 component part H2O for 10 moment or dip the pecker in 70 percent alcohol and allow them to dry . To forestall the disease , water " Sky Pencil " holly plant regularly . If your soil drains poorly , imbed the Buddy Holly in a raised bottom . Add mulch , such as pine straw or aged barque , around the plant to prevent hurt to the barque when mow the lawn and to help keep the grime moist .
Nematodes
microscopical parasitic worms , nematode can infest " Sky Pencil " holly establish . They ’re more of a problem in sandy or sandy loam soils . Several different types of nematodes may sham " Sky Pencil " holly , let in root - gnarl , stunt , sting , closed chain , lesion , shaft and spiral roundworm . The parasites go in organic material in the soil surrounding the plant life or within the industrial plant ' root , and attack the root system . symptom include stunted growth , white-livered leaves , foliage passing , poor response to water and fertilizer and stem dieback . nematode worm are most likely to be in the grease of old vegetable garden , so avoid planting " Sky Pencil " holly in those areas . If the hollies show signs of nematodes , remove the Sir Herbert Beerbohm Tree as well as the surrounding dirt and avoid engraft holly in that orbit in the future .
Phytophthora Root Rot
If you plant a " Sky Pencil " holly in poorly draining soil , it may develop Phytophthora rootage rot . The disease usually affects container works . Infected plants show symptoms including wilt leaves with tiresome gullible , red , imperial or yellow discoloration ; twig dieback ; and slowed growing . Bark at the soil personal credit line may appear darker in colour . The fungus that make the rot can pull through in soil for years if the soil remains moist . The fungal spore can be spread through water supply , contaminated garden tools and filth . Phytophthora root rot is more likely to spread during cool , moist conditions in early spring or belated fall . To prevent the disease , make certain the holly ’s beds or containers have well drain and avoid overwatering the plants .
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