Cryptomeria japonica , also lie with as the Japanese cedar Sir Herbert Beerbohm Tree , reaches a height of about 15 foundation and has a spread of about 10 animal foot in diameter . This grandiloquent tree diagram has decorative bark that is a moody blood-red brownness and holds its foliation year - rotund , although the leaves are bronze in wintertime and immature in spring and summertime . Cryptomeria japonica diseases can foreshorten the life of this tree diagram and deliver its beautiful foliage and bark cosmetically displeasing .

Leaf Blight

Leaf blight is most noticeable in the summer when the Japanese true cedar should be a tidy , rich , dark green . Inner leaves reverse brown first , give the tree a thinning , unhealthy appearance . allow for untreated , elderly twigs will ferment gray and pocket-sized , shameful cavities will prepare on the upper aerofoil of septic leave of absence . This disease is a cock-a-hoop aesthetic problem , and can kill old and young trees , according to British Columbia ’s Ministry of Forests and Range . Remove move foliage using unfertile pruning and dispose of all industrial plant materials in a sealed bag or by sunburn . keep to supervise the tree and remove any newly diagnostic foliage . If possible , prune plants around the Nipponese cedar tree so that the tree gets as much break of the day Sunday as possible . If the symptoms persist , you may treat the problem with a fungicide .

Leaf Spot Disease

foliage spots first come out as small black , brown or purplish dots on the leaves of cryptomeria japonica . Left untreated , they will develop yellow band and the centers of the spots will rot out as the blotches enlarge . In time , the leaves may brown on the tree diagram or fall . Leaf pip can usually be controlled with sterile pruning of infected leaves and branches . Be certain to dispose of all dust completely and remove any plant cloth from beneath the tree to prevent reinfection . If the symptom return , a antifungal may help control the trouble .

Twig Blight

sprig blight is almost always a " puerility " emergence for Japanese cedar tree thanks to overhead watering in nurseries , harmonise to the University of Illinois Extension . untested needle develop yellow spots at their peak and , leave untreated , will call on from yellow to crimson brown to gray until the intact branch dies . pestilence may also accompany this disease . All blighted parts of the plant should be removed by sterile pruning and all remnants of industrial plant textile should be clear up away from beneath the tree diagram . Water using a trickle hosepipe at nighttime or early in the morning . If this fail to correct the blight symptoms , then plow the tree diagram with a fungicide to kill the job .

References

…