aboriginal to Asia , hibiscus trees grow in garden and containers across the United States . These ornamental plants are esteem for their showy yellow , white , orangish or crimson bell - shaped flower and glossy leafage , and form attractive hedging , borders , specimen trees or container plant if prune befittingly . Although considered hardy , certain disease severely damage hibiscus trees and require straightaway attending .

Types

Hibiscus diseases include canker , leafage spot , mushroom-shaped cloud root rot , pinch bunk , genus Phytophthora radical rot and botrytis blight .

Identification

Canker is a fungal disease that is identify by the appearance of smart orangish - red lumps or fruiting bodies on the bark of the septic Sir Herbert Beerbohm Tree . Leaf spot disease in hibiscus trees is because of fungous or bacterial pathogens that vary in size from tiny spots to ones large enough to pass over the entire open of a leaf . These irregular - wrought or round speckle are usually besiege by halo . A brown discoloration that appear at the point where root unite the prow show the presence of collar bunkum . Phytophthora root rot is a stain - abide disease that arises where ground are extremely dry in the summertime and exceedingly blotto in the winter . Botrytis blight , also call up greyish mold is a fungous disease have by Botrytis cinerea .

Symptoms

symptom of canker include sudden twig and arm dieback . Dead leaves affected with leaf spot disease come along fateful , brownish or tan , and some are besiege by a purple or red border . A hibiscus tree that abruptly begins to droop and then dies curtly after is infect by mushroom root hogwash or Armillaria tabescens . Leaves of hibiscus trees infect with collar rot spell brown or the body near the theme becomes slimed . root word infect with phytophthora antecedent molder twist reddish - chocolate-brown and brittle , and the fungus kingdom cause the foliage to turn yellow and shed , plant growth to slow down down and limbs to cash in one’s chips back in the initial stages . The flowers of hibiscus trees infect with botrytis blight develop dark dark-brown blurred patch . These patches also appear on the stem and folio .

Cure

Prune wood infect with canker and discard immediately to prevent the disease from go around . Spray Bordeaux on taint parts to cure leaf spot . Prune parts of the Sir Herbert Beerbohm Tree infect with collar rot and utilise a layer of Bordeaux library paste over it . There is no therapeutic for hibiscus trees infect with mushroom ascendant rot and genus Phytophthora root rot , so prevention is the only control .

Prevention

Practice proper watering , feeding and pruning docket so the hibiscus is hardy and does not succumb to cankers in the future . Minimize barque and automobile trunk injuries to foreclose pathogen from embark open wounding . Provide undecomposed air circulation to the hibiscus tree to forestall the occurrence of leaf spot disease . Plant hibiscus trees in well - run out grunge to forbid mushroom-shaped cloud radical rot . embed the hibiscus tree in well - draining stain and avoid stress to prevent genus Phytophthora root rot . Remove pass bloom ; head off wet flowers and foliage and spray antifungal turn back atomic number 29 hydrated oxide , mancozeb or potassium bicarbonate as soon as symptoms of botrytis blight occur .

References

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