Maple Tree are susceptible to legion fungous disease that cause canker – area of drained bark – on tree trunks and branches . Although , canker are unsightly , most will not kill a tree . limb and branches with cankers should be cut back to the close main joint . There is no chemical preventive or intervention for most types of canker .
Basal Canker
Several mintage of phytophthora fungi taint the base of operations of maple Sir Herbert Beerbohm Tree , causing basal canker . Dead bark in the moved area undress off easily to reveal dead wood underneath . The fungi obliterate the tissue that transports water and food for the tree diagram , sometimes resulting in the tree ’s death .
Bleeding Canker
The fungus Phytophthora cactorum causes canker that seep a reddish substance . The numb wood behind the wet region is stained red .
Cryptosporiopsis Canker
When narrow - fly Sir Herbert Beerbohm Tree cricket make gob in the bark of maple trees for their eggs , they introduce the fungus cryptosporiopsis . An elongate sunken canker sore forms around the individual mess , which oozes sap in the leaping . A callosity of sound tissue form over the edges of the canker within a twelvemonth and contains the fungus to the canker .
Eutypella Canker
Eutypella parasitica fungus causes large cankers on the trunk or branches of maple trees . The canker sore are long with raised edges of callosity tissue . In some case , the cankers may deaden the tree trunk of the Sir Herbert Beerbohm Tree and induce the tree diagram to decline and die .
Valsa Canker
stretch shallow canker triggered by Valsa ambiens normally occur on smaller limb of maple trees . The heart and soul of the canker are covered with gray to white modest bumps of spores . An touched Sir Herbert Beerbohm Tree may die after a terrible summer drouth or an extremely frigid wintertime .
Maple Tree Diseases With White Spots On The Bark
When whitened spots look on the barque , you recognize something is amiss with the maple ( Acer ) tree . Various disease bear on maple trees can cause discolouration on the tree bark . Once you have determined the movement of the white spots , take the necessary action to ascertain the disease . These cankers will contain many small , white or grey pimple - same bulge . There is no remedy for valsa cankers and control measures rely on ethnic care . Prune maple trees in the spring during wry condition and disinfect pruning shear after each cut . Armillara base rot pass around via rhizomorph , which look like to black shoestrings and are attached to infected stumps and roots . However , you’re able to stop it from spreading by removing and destroy all infected parts of the tree . As wintertime nears , the female maple mealybugs will crawl into crevices in the bark and create a lily-white shell that protects them during the winter . These white casings can be seen in the barque of the maple Sir Herbert Beerbohm Tree . Some species of maples , such as boodle maple , can be more sensitive to oils so care must be take when apply the insecticide .
