Maple trees are among the most pop shade trees in North America . Though some are used for the commercial-grade sirup diligence , many others are planted merely for the use , tincture and beauty they render . The trees , however , are susceptible to many disease , some of which bring about brown spots on the leaves . Maple possessor should watch for disease signboard and take action , if possible .
Anthracnose
Anthracnose is one of the most usual maple diseases and is typically not very serious . The most obvious signs are purplish brown spot that constitute along the folio veins . Light brown or saturnine dark-brown maculation may also form between the veins . This maple fungal disease is most ordinarily noted after a cool , blind drunk winter , which provides the spore with their optimal growing conditions .
Tar Spots
Tar spots are another common fungal disease in maple that is not believe very serious , but can be a aesthetic eyesore . The spots generally start off as yellow and may become half an in or more . They eventually ferment smutty , but there is also a stage where they are brown . This disease most usually appears in mid - June , but may start somewhat in the first place in warmer climates .
Fungal Treatment
In both of these cases , the fungus life story cycle usually ends when winter comes . Dead leave can harbor spores over the winter and therefore should be graze and remove to preclude infection in subsequent days . repeat infection can induce problems for maple , specially those with anthracnose , because previous leaf drop could impact the power of the tree to nurture itself . If the tree is young enough , you could also spray with a fungicide as a preventative measure , but once the brownish spots appear , it is too late .
Chlorosis
Chlorosis is reasonably less common than the maple fungal infection , but still can make brownish spots on maples leaves . The first symptom , however , will probably be a pale leaves . greensickness can come along at any time other than the wintertime , if you live in an field where maple trees go dormant in the winter .
Chlorosis Treatment
Chlorosis is an absence seizure of chlorophyll and , if leave alone untreated , can kill the tree diagram , which will not be able-bodied to make its own carbohydrates through photosynthesis . It is most unremarkably stimulate by an absence seizure of iron or an dissymmetry in pH stratum and may even be the result of over - lachrymation . Have the soil test and take appropriate action at law to raise the smoothing iron or alter the pH , if either one is revealed as the problem .
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