Dr. Phyto

rockspray cotoneaster

Cotoneaster horizontalis

Diseases & pests on this plant

• fire blightErwinia amylovoraEU-notifiable quarantine organism

  Sudden blossom wilt with blackened shoots curling into a shepherd's crook, amber bacterial ooze on bark in warm weather, scorched-looking dead leaves still clinging, rapid spread in spring.

• entomosporium leaf spotDiplocarpon mespili

  Small purple-red spots with grey centers on young leaves, spots merge into larger lesions, defoliation in severe years, fruit blemishes on loquat.

• brown soft scaleCoccus hesperidum

  Flat oval brown-tan scales (3-5mm) on undersides of leaves + along stems, sticky honeydew dripping onto floor or lower leaves, black sooty mould growing on the honeydew, leaf yellowing + drop in heavy infestations, ants attracted to honeydew.

• Phytophthora root + crown rotPhytophthora cinnamomi

  Sudden wilting + collapse of mature trees during summer heat stress, dark sunken cankers at base of trunk often oozing dark sap, root system rotted away to small white feeder roots only, gradual general decline + sparse foliage 1-3 years before final collapse, characteristic V-shaped soil-line lesion when bark peeled back.