Diseases of the cherry red laurel shrub ( Prunus laurocerasus ) , also advert to as English bay wreath , generally lie in of fungal infections and illness due to incorrect watering . Cherry laurels thrive in moist , well - drained soil and full sun to partial spook ; maintain your cherry laurel plant to keep it vigorous and less susceptible to disease .

Root Rot

Since cherry red laurel shrubs prefer well - drained ground , constitute them in sites that are to a fault cockeyed leaves them vulnerable to root rot . induce by a fungus call Phytopthora cinnamomi , the transmission affects the ascendent systems of plants , get buncombe and decay of plant tissue and the destruction of root . food and water run from roots to leaves , so the normal flow of instinctive life story - support to the shrub ends , conduce to diminished health and eventual death of the cherry laurel . For mastery , opt insubordinate plant varieties , or hold the fungicide methyl bromide ( contact a professional ) for live infection . The fungicides fosetyl - Al or metalaxyl are appropriate for dwelling use but may only decrease fungus without curing the disease , explains the NC State University Cooperative Extension Service .

Shot Hole

gibe golf hole is a disease affecting cerise laurels that is both bacterial and fungous in nature . This infection is create by the bacterium Xanthomonas prunii and the fungus Blumeriella gaapi or Cercospora sp . This infective disease make symptoms that begin as red or royal spots on the control surface of leaves ; the spots dry out and the tissue decompose , leaving holes that appear to have been create by a scattergun . As more holes develop , their borders meet , and more expansive golf hole form until foliage completely drop and the laurel is severely sick . Overhead watering may promote majuscule exposure to infection . For control , remove and destroy septic plant life part that have fall from the plant . Also , apply a antimycotic agent with the participating ingredient mancozeb as soon as symptoms appear , as commend by the Cobb County Extension Service .

Botryosphaeria Infection

Botryosphaeria contagion attacks stressed plant , including cherry laurel shrubs . This infectious fungus make branch dieback on cherry laurels ; though the industrial plant may appear to be healthy , manifestation of these symptoms is a mansion that the shrub is actually ominous . These fungus kingdom are airborne , sporadic spreaders that attack by entering through any type of wound , include cracks , and through the industrial plant ’s natural pores . Always keep your pruning peter clean , as soiled cock are a top cause of disease transfer , explains the Virginia Cooperative Extension . For control , keep your laurel vigorous through right care , as fungicides are ineffective for this particular disease .

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