Japanese lilac trees ( Syringa reticulata ) are blue - maintenance Sir Herbert Beerbohm Tree that breathe a pleasing fragrance and are well - suited for a variety of conditions include urban areas , residential neighborhoods and drought . Common problems mostly include pests and diseases like borers and fungous infections that the tree may resist if go on in good health .

Bacterial Blight

Bacterial blight , also referred to as bacterial canker , is because of the bacteria Pseudomonas syringae pv . syringae . This is a common bacterial transmission that causes health problems for the Japanese lilac tree , often attacking plant during excessively wet full stop , enter through wounding or instinctive stoma . symptom include brown pip on the foliage , surrounded with white-livered borderline ; the edges of office may overlap , forming a with child affected brown area of leaf tissue that rapidly choke . All parts of the plant may be infect , causing flowers to become browned and buds to melanize . Bacterial plague more ordinarily taint young trees ; more establish trees are less vulnerable . For control of this problem , keep your Japanese lilac tree vigorous for better immunity against disease . Keep pruning equipment light to prevent disease transfer and prune bear on offset back below any visible signs of abnormal increase or lesions . Avoid overhead watering and enforce two to three preventive copper fungicide treatments once every hebdomad to ten days when your Nipponese lilac lead off to produce new plant growth , according to the University of Illinois Extension .

Wood Rots and Decays

A vulgar problem associate with Japanese lilac tree is incidence of wood hogwash and decay . Several types of fungi attack Sir Herbert Beerbohm Tree , forge an transmission with obvious symptom . septic trees exhibit maturation resembling mushrooms , often in the mannequin of shelf in two category , either soft ( flat " fruiting bodies " that project from the tree ) or conk ( hard brown / white bodies ) . Other fungal infections may produce the wide recognized puffball mushroom . Where there is fungus , a Japanese lilac tree may be experiencing interior decay within the trunk or offset though the tree appear to be reasonably healthy . Suggested controller includes tree diagram removal , according to the University of Illinois Extension .

Lilac Borer

Lilac borers ( Podosesia syringae ) , also a pestilence to ash tree trees , attack Japanese lilac trees , causing wellness problems . In lilac tree , the lilac borer lays eggs that brood , give rise larvae that bore into the woodwind instrument of the lilac tree . During the outflow time of year , the larva which have turned into adult exit the tree ; adult woodborer are moth that resemble WASP . Their feeding , expansion within bark and creation of holes countermine the lilac tree . Symptoms let in wilted prow and stems that are conceited at the base ; the tree ’s barque may pull out away from the tree . Since rock drill most normally infest trees already injure or in decline , the first line of defence is go along your tree healthy through proper caution . withdraw and destroy infected works parts . For chemical control , put on the insecticide permethrin , as recommended by the Kansas State University Research and Extension .

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