Walnut tree ( Juglans spp . ) often devolve their foliage prematurely due to bacterial or fungous diseases . Other symptom of disease on walnut tree trees admit unnatural growth of foliage , damage nuts and dead area of bark . Most walnut tree diseases are not stern and do not cause permanent damage . Grow walnut trees in full sun in rich , moist soil . Plant them at least 60 to 80 feet away from other tree to prevent herd , and trim regularly to provide good air circulation . Remove trimmings and other junk from around the Sir Herbert Beerbohm Tree and destroy it to prevent the bed covering of diseases .

Anthracnose

Anthracnose is a fungal disease of walnut trees that is more wicked after a cool , fuddled spring or summertime . symptom include black spots on the foliage and fruit husks , and shriveled junky . The foliage may wrick yellow and drop untimely , but the disease in not fatal .

Bacterial Blight

Small maverick spots on the foliage , petioles , youthful shoots and nuts of walnut trees characterise bacterial blight . The husks , shells and bollock turn black , and may sink untimely .

Black Walnut Decline

Black walnut decline is also call thousand canker sore disease because of the legion ellipse cankers that form under the bark of septic Sir Herbert Beerbohm Tree . The upper crown produce little or no spring ontogenesis and the stirred region build up down each year . Infected walnut trees normally die in two to five years . There are no chemic controls for black walnut tree declination , although intemperate pruning early in the disease may save the tree .

Walnut Blight

Walnut blight cause small , water - drench spots on the leaves , shoots , junkie and bark of walnut tree tree . The disease remains in the newfangled growth and does not spread to the erstwhile outgrowth . Infected freak may not fill out properly . Apply copper fungicide for walnut blight agree to the manufacturing business ’s directions to control the disease .

Walnut Bunch Disease

Walnut cluster disease is characterise by " witch ’s broom"–abnormal shaggy-coated lateral shoot with undersized leaves . The hag ’s broom normally begin growing earlier in the spring than the normal leaf , and continues develop later in the gloam . septic walnut trees will not produce a normal craw . Prune out the beldame ’s brooms ; if more appear , you must remove the tree .

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