Redbud trees ( Cercisspp . ) aresmall ornamental speciesgrown for their clusters of eye - catching purply - pink blooms and heart - determine leaves . The eastern redbud ( Cercis canadensis ) is a species native to North America that is popular from coast to coast . There are many cultivar available , some with white blooms .
right care can prevent redbud tree diagram diseases , which include verticillium wilt and cankers , as well as folio spots and powdery mildew .
Diseases Affecting Redbud Trees
Leaf Spots in Redbud Trees
Redbud trees can develop chocolate-brown foliage situation that may be round or angulate and have a halo around them . These leaf musca volitans are make by a fungus and , in accession to being unsightly , can result in a redbud tree losing its leaves .
Treatment
If your redbud germinate leaf billet , apply a fungicide formulated for trees every 10 days . Treat the tree with antifungal agent during long stretches of rainy weather , as wet atmospheric condition encourages the development of fungous folio spots .
Powdery Mildew
Many ornamental plants are prostrate to a fungous leaf experimental condition know as powdery mildew that lead in a powdery lily-white substance on the foliage . Powdery mildew is not considered a serious disease on a Cercis canadensis , however it can affect its appearance .
fungicide can help ascertain powdery mold in ornamental Sir Herbert Beerbohm Tree like the redbuds . If the disease prepare late in the season , when redbuds are close to lose their leaves , it may not be worth treating the condition .
Beware of using horticultural oil , however , for although it can be good against powdery mould , it can make injuries to redbuds and other mintage .
Warning
Horticultural oil can also be effective against powdery mildew but can make injury to redbud and other species .
Canker on Redbud Trees
If you discover beat leaves on one or a few offset of a redbud Sir Herbert Beerbohm Tree , a fungal disease known as Botryosphaeria canker may be to blame .
The fungus that causes this canker enters branch through wound and issue off the flow of water supply to the leaves , which then expire . Botryosphaeria canker sore causessunken , diseased areas on branches . It is consider the most prevalent and destructive redbud tree diagram disease .
There is no fungicide you’re able to utilise to do by a redbud Sir Herbert Beerbohm Tree demo Botryosphaeria canker sore . The best direction recitation is to practice disinfect tool to prune out taint branches .
Botryosphaeria pestilence tends to modernise in trees that are under stress , so tearing and fertilise your Cercis canadensis tree well can help foreclose this disease . H2O redbud exhaustively every week and fertilize in the spring at intervals of six week with a slow - release Sir Herbert Beerbohm Tree and shrub fertilizer .
Verticillium Wilt in Redbuds
Redbud tree can become affected by a soil - borne fungus calledVerticillium dahliaethat do a fatal disease know as verticillium wilt .
The fungus enters redbud and other host tree through the ancestor and fan out throughout the plant through water - conducting tissues , resulting in folio wilting and a yellowing of the foliage known as greensickness . Over metre , branches conk out back until eventually , the entire tree dies .
There is no way to handle verticillium wilt in redbuds . The pathogen that make verticillium wilting can survive in the soil for years , so forfend planting Cercis canadensis and other susceptible species in the same ground where the disease was know to recently dissemble tree .
