The Leyland cypress ( x Cupressocyparis leylandii ) has a muckle going for it . tight development , with evergreen plant , feathery foliageand a pleasing , svelte profile , it make an excellent specimen tree or cover plant . regrettably , there ’s a downside to go along with all that good : The Sir Herbert Beerbohm Tree is susceptible to several insect pests , diseases and environmental issue that can damage it , cause the foliage to turn chocolate-brown .
Temperature Troubles
grow in U.S. Department of Agriculture works hardiness zones 6 through 10 , the Leyland cypress fly high in mild to temperate clime and can suffer saltiness spray , which wee-wee it an excellent choice for home gardener who live near the glide . Damage to these trees can occur in the winter , however , when ironical , cold winds draw wet out of the tree ’s leaves , causing them to work brown . Reflective sun on snowfall can scorch leaves , also turning them brown . There ’s not much you’re able to do to protect the tree diagram other than providing protection for it — if your Leyland cypress rise in a grass , consider go it to a location where it will be protected from strong winter farting . In former spring , remove the brown arm and your tree should bounce back .
Damaging Diseases
The Leyland cypress is vulnerable to disease that damage both the roots and leaf . The most destructive is a fungal disease called Seiridium canker , which presents as benighted , depressed country on the woods . Often , you may see petite pitch-black spots on the woodwind , which are the fruiting bodies of the fungus . Affected leaf sprain reddish - brown and should be rationalize out . To keep the spore from spreading , plunge your pruning tool in a resolution of 1 part blanching agent to 9 parts water before you make each slash , and make out a full column inch below the pestilence . No chemical controls are effective in preventing or curing the fungus , grant to the North Carolina State University Plant Pathology Extension . Other disease that might cause brown foliage include ascendant rot diseases , which weaken or destroy the roots of the tree , make the tree to step by step sicken or decease . bacterium and fungi that live in the grease are usually responsible . Chemical control condition is not good in this case either . The best cure is bar — ensure your trees are planted in well - drained ground where no previous plant has died of a disease .
Bothersome Bugs
You probably wo n’t even note if your Leyland cypress Sir Herbert Beerbohm Tree is habitation to a few bugs — unless it ’s home to the common bagworm ( Thyridopteryx ephemeraeformis ) . The bagworm is the most serious insect pest of the Leyland cypress , harmonise to the North Carolina Cooperative Extension . plague can stunt the growth of the Sir Herbert Beerbohm Tree , and severe infestations can even toss off it . The cat feed on the needle , cause them to turn browned and come down off , and they produce little bags that look fairly like cones . Usually , rude predator are enough to keep bagworm populations low enough to avoid seriously damage the tree , but you may also remove the bags to help control the spreadhead of the pest .
Suffering From Stress
Like all plants , the best the produce consideration , the stronger and healthier the plant . Adverse environmental conditions can stress a Leyland cypress , make it more vulnerable to diseases and blighter , stunting ontogenesis , and causing the foliage to die back . Although they will tolerate poor dirt , fond shade and once in a while dry experimental condition , Leyland cypress tree diagram ask full sun and plentiful , moist and well - drain soil to remain healthy . Extended time period of drought can accentuate the tree diagram , especially in hot climates . A mark between two Pacific seashore species , the Leyland cypress tree expand best in moist , cool climates .
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