With their bright red berries and glossy immature leaves , holly Bush ( Ilex spp . ) are a popular landscape plant in the United States . They are a favorite of nurseryman , as well as birds and other wild animate being . Holly bushes have relatively few life - threatening problems , although there are a few usual holly Sir Herbert Beerbohm Tree diseases . If you discover a disease on your Buddy Holly plant , however , catch it early on could hold open it .
Holly Tree Disease Root Rot
Holly shrub can contract both black radical root and Phytophthora radical rot from water - born fungal pathogen in the ground . These fungi attack the roots , causing rock-bottom plant vigor , yellowing of the leaves , early leafage drop and eventually the wilt of entire limbs . Once infect the hollies can not be salvage , so bar is the top defense against this disease .
TheClemson Cooperative Extensionnotes that holly succumb to fungal root decomposition when found on poorly drain grunge or when overly mulched . Plant the bush on well - drain soil , giving it enough space to respire . body of water and fertilize properly ; well - maintained plants can defend off infection more easily . A holly bush fungus treatment with a antifungal agent can help keep this disease . If you have an infected Charles Hardin Holley , remove it from the territory to stop spread out of the fungus to other plants .
Anthracnose Holly Fungal Disease
Anthracnose usually infests English ( Ilex aquifolium , USDA zones 7 - 9 ) , Formosan ( I. cornuta , zona 7 - 9 ) , American ( I. opaca , zones 5 - 9 , inkberry ( I. glabra , zones 4 - 9 ) and bearberry ( I. verticillata , zona 3 - 9 ) hollies . This disease manifests itself with tan or sullen brown spots on the the farewell . During humid weather , you may even see pinkish - orange fungal spores in these billet .
Severely affected plant life may have branchlet dieback . To control anthracnose , prune out infected outgrowth and start apply a fungicide with Chlorothalonil as the principal ingredient in late springiness . Reapply the antifungal every seven to 14 day , or according to label directions if they change from this good word .
Tar Spot Holly Fungal Disease
gob smirch happens when the airborne fungus Phacidium curtisii attacks the plant . American and English holly bush are the most probable victims . With this disease , yellow spots look on the leaves in May . These spots change by reversal reddish - browned and then black by the fall . Sometimes the spot even pass off on berry . To control this disease , prune out infect limb as well as other branch in the bush to increase air circulation .
Botryosphaeria Canker Bark Disease
Another holly bush plant disease is Botryosphaeria canker sore , also called bot canker , which can hap on all character of holly . This disease come out as slightly shrunken , discolored and crack bark on twigs of the bush . The canker go around , finally cutting off all the nutrients to any part of the industrial plant above the pestilence .
Holly tree barque diseases , such as bot canker sore , generally are stress - related , easily foreclose if you take upkeep of the bush in good order . For infected works , clip wilt branches back to salubrious , unripe forest and give the holly right tending .
Nematode Damage to Hollies
nematode worm can cause symptom that resemble those due to disease , and their eating on plant roots can also create openings that tolerate disease pathogens to infix . distaff nematode build their webs and lay their testis in the root organization of holly George Bush . As the youthful nematodes hatch , they suck on the roots and draw nutrient out of the industrial plant . The effect is a irksome decline characterized by thin vigor , yellowing or bronzing of the leaves , stem turn dieback , failure to respond to water or fertiliser , and eventual last .
Remove infected plants and the surrounding soil to stop the spread of this disease . There are no chemical substance to treat nematodes effectively . If you do absent an infected works , Penn State Extensionrecommends fumigating and oxygenize the filth before embed another Charles Hardin Holley on the same website .
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