Hardy and strong , lilacs are fairly disease resistive and some sort are breed to be even more so . Plant them with space between and in good sunlight to better their chances of avoid disease . Wet springs , over - tearing and shady areas can contribute to disease so void these situations whenever possible . Recognize the signs of the common diseases and know what to do about them when they come . in some case , you may have to destroy the lilac bush to preclude the cattle farm of the disease .

Lilac Blight

Lilac blight or lilac bacterial blight is a disease affecting lilac George W. Bush that leaves bud and new leaves looking melanise and scorched . It is prevalent following a wet , rainy spring , especially following a winter combat injury to the plant or a former frost . bud and leaves may seem normal at first but leaves will develop black stripe and buds will blacken and continue closed .

Treatment for Blight

The only treatment for lilac blight is to prune any affected limbs and burn the wastefulness . Prevention is a better way to go . Keep plants well - space and pruned to prevent rubbing and let right air flow around the plants . Avoid over - fertilizing and fertilizing late in the summertime . Each give before bud begins , spray the bushes with bull sulfate .

Powdery Mildew

Powdery mildew is a fungus that affects ornamental plants and causes a white or gray powdery - wait appearance on leaves , flowers and stems . Sometimes , leave of absence will begin to twist or curl before the fungus is visible . Airborne spores cause the infection and outbreaks are most uncouth when temperature are between 60 and 80 degree Fahrenheit . Powdery mold is not disastrous but can cause works to turn a loss leaves early and enter premature fall dormancy .

Treatment for Powdery Mildew

absent diseased branch and dispose of them through burning . Prune scrub on a regular basis and keep spacing between plant to prevent overcrowding . Remove fall leave from the groundwork of the plant , peculiarly infected leaves , and destroy them . Do not forge with industrial plant when wet . Use soaker - type hose for tearing during juiceless flow instead of overhead sprinkler that give the foliage wet .

Viruses

Virus pack bit is a computer virus that display yellow spots , like target , on leaves . The leaf ultimately fall off and the industrial plant will die . Virus ring spot causes leaves to lose their green people of colour and become evenly color in in white-livered . Mosaic virus causes a dappled visual aspect of green and yellow . Affected plant should be destroyed immediately to preclude the spread of the virus . Viruses attack subvert or damage plants and may be diffuse by insects such as aphid and leafhoppers . Pesticides that control these dirt ball may prevent the computer virus from destroying the plant .

References

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