True cedarwood trees ( Cedrus spp . ) belong to the Pinaceae plant family and naturally go on in Asia and Africa . Cedar tree variety bear greenish , needle - like leaves and pine cones . Most cedar varieties choose moist filth in fully sunny locations . While cedar trees have a repute for being hardy , they sometimes suffer from a few mutual cedar diseases .
Cedar-Apple Rust
Cedar - apple rust ( Gymnosporangium juniperi - virginianae ) is a fungous disease that requires two unlike host trees to dispatch its liveliness cycle . Early sign of this disease on cedar trees admit egotistic areas , called gall , mould on the branches . Gel - like , orange growths frequently sprout from these galls . Severe cases of cedar - apple rust typically cause leg dieback . The fungous pathogens overwinter in the bile and then spread to the roseate host in the following spring . Control include planting disease - resistant cedar tree diagram and spraying infected trees with antifungal .
Port-Orford-Cedar Root Disease
The Port - Orford - cedar root disease causes the smaller root of infected cedar tree trees to look darkened and watersoaked . The septic rootlets disintegrate speedily . The disease then move on to nearby larger ascendent , causing them to turn reddened - dark-brown in color . The leaf on affected trees typically look yellowed and slightly wilted . due to the Phytophthora lateralis fungous pathogens , this cedar tree tree diagram disease mainly spreads through soil movement due to construction workers , route maintenance workers and loggers . antimycotic agent often help control the symptoms of Port - Orford - cedarwood stem disease .
Tip Blights
Cedar trees planted east of the Mississippi River sometimes support from Kabatina steer blight or Phomopsis tip blight . These two fungal disease cause unsightly scathe , but seldom kill the infected trees . Phomopsis tip blight ( Phomopsis juniperovora ) typically appear from mid - spring through the fall during warm , humid weather condition . The new arm typically turn red - browned in color , and then fade to an ashen gray . Tiny , gray spots often gird the arm steer and get folio blighting . flyspeck , pitch-black fruiting bodies organize inside of these lesions . take over infection often cause stunted foliage growing . Kabatina tip blight ( Kabatina juniperi ) generally appear in February and March . Branch crown first turn a dull unripe color , and then develop chicken or red spots that contain small , black fruiting dead body . The dead foliage typically drops from the infected Sir Herbert Beerbohm Tree by summertime . Preventative measures include planting disease - resistant true cedar tree and providing proper air circulation . Fungicidal applications sometimes control Phomopsis tip blight .
Cedar-Quince Rust
cedarwood - quince rust , a fungous disease triggered by the Gymnosporangium clavipes pathogens , commonly bear on easterly red cedar trees . Cedar - quince rust infection cause the branches to swell up , often girdling and killing the small branches and twigs . These puffiness often crack and develop cankers . Orange , gel - corresponding bodies grow through the swollen bark during wet spring weather . According to the Missouri Botanical Garden , the swellings can rest infective for more than six years . dominance includes pruning out septic tissue , applying preventative antifungal and planting disease - resistant cedar varieties .
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