When grown in its lifelike environment , the coast or coastal sequoia tree ( Sequoia sempervirens ) is susceptible to few diseases . However , many redwoods are grown as landscape tree diagram in conditions that are quite different from the forest . While these trees may survive , inappropriate growing status put them in a never-ending state of matter of stress that leaves them vulnerable to a routine of disease .
Sudden Oak Death
Sudden oak death ( Phytophthora ramorum , also known as ramorum blight or dieback ) is a virulent disease that affect a mixture of species , including the coast redwood . septic redwoods see extensive branchlet dieback that work the affiliated leaves brown . Shortly thereafter , the sea-coast redwood will die . There is no curative for sudden oak end . The well course of action is to extirpate and destroy the tree diagram to prevent the spread of infection .
Phytophthora Root Rot
Phytophthora root rot is triggered by a soil - borne organism . When first infected , the coast redwood ’s foliage may droop , yellow-bellied and dry out but remain on the tree . The folio damage is because of the slow destruction of the redwood ’s roots , which limit its ability to absorb enough quantity of water supply . Eventually , the entire tree will turn brown and is improbable to recover . If caught early enough , genus Phytophthora root rot ’s presence in the territory may be cope , or at least reduced , with the practical software of a fungicide turn back potassium inorganic phosphate . But this is not always successful .
Armillaria Root Rot
Armillaria rootage molder seldom infect hefty coast redwoods . But accentuate , under- or overwatered redwoods may fall fair game to this disease . This soil - borne disease enters the plant through the roots , where it may be year before symptoms become detectable . An infected seashore sequoia may easy decline over a point of old age , section by section . Or it may suddenly droop and then choke in a few week . To place armillaria root rot , pull back the tree ’s bark . Infected trees will have white or yellow devotee - shape mycelium growing between the bark and the wood . There is no cure for armillaria root rot . Infected Tree should be uprooted and destroy and the soil sterilized before another tree is planted in its seat .
Botryosphaeria Canker
This fungus feeds on the cambium , sapwood and inner bark of de-escalate tree , forming turgid cankers . As these canker arise , the fungus develops pimply black fruiting social structure . The cankers will finally gird the branch , cutting of the nutrient supply to the leave . To get free of botryosphaeria canker , dress away the septic plant tissue .
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