What is wrong with my Photinia?

Are the leaves covered with white powder?

Are there any velvety, olive-green spots formed on all plant parts?

Did the flowers and leaves suddenly blackened, and the tips of growing shoots bend over?

Do the roots and crowns have dark brown spots at the soil level?

Are there any tiny, reddish spots on leaves, spots are sometimes surrounded by a dark red, purple, or yellow halo?

Are the leaves curled and yellow?

Do the leaves have silvery pallor?

Does the plant begins to wilt and are there zigzag paths in roots or stems?

Are the leaves pale and mottled?

Are there wet, sappy areas on the bark of the main trunk, which may crack?

White, powdery patches on the leaves are caused by a fungal disease Powdery mildew. Powdery mildew usually appears in damp places. Encourage good air circulation around the affected plants by thining them and any surrounding plants. Water plants from below to keep foliage dry. Any affected leaves should be cut off and removed. Any commercial fungicidal spray will protect your plant from further infections.

Scab causes velvety, olive-green spots to form on all plant parts. Leaves and fruit fall prematurely. Avoid using sprinkler irrigation. Apply a fungicide in the spring and at regular intervals until the weather dries.

These symptoms indicate a bacterial disease Fire blight. Control fire blight during the growing season by pruning off branches a foot below infected sections. Between each cut, dip pruning shears into isopropyl alcohol or a 10 percent bleach solution to prevent spreading the disease as you prune.

These symptoms indicate fungal disease Phytophthora Root and Crown Rot. Phytophthora pathogens are favored by wet conditions, and the risk of disease can be reduced with good water management. The disease tends to affect plants in poorly drained areas, where susceptible plants are surrounded by standing water or saturated soil for prolonged periods. Provide adequate drainage and know the water needs of individual plants.

Entomosporium leaf spot causes tiny, reddish spots, sometimes surrounded by a dark red, purple, or yellow halo, to appear on infected leaves. Spots darken and enlarge as the leaves mature. Remove and dispose of spotted leaves on plants and the ground near plants. Use drip, flood, or low-volume sprinklers instead of overhead irrigation. Where the problem is severe, a copper fungicide can reduce damage if thoroughly sprayed on plants before they are damaged.

Distorted, curled leaves are caused by aphids. These insects cluster under leaves and on growing tips where they feed on plant sap. You can control them by washing them off the plant with water spray. Insecticidal soap should be used with severe infestations.

Pale, silvery leaves, and petals are caused by thrips. They hide under leaves and inside flowers. Severely infested plant parts should be pruned off and destroyed. Control thrips by introducing lady beetles or lacewings. Insecticidal soap helps in severe infestations.

These symptoms are caused by Black vine weevil larvae. The larvae are small whitish grubs, which feed within the fruit, stem, or roots of plants. The larvae feed on the roots and stems. The feeding can girdle the stem, killing the plant. Drench the soil around your artemisia with the predatory nematodes solution. If there are adult weevils, knock them from the plant on a piece of cloth and destroy them.

Lace bugs are flat, dark-colored insects with lacelike wings that feed on the undersides of leaves. They cause leaves to turn yellow, then brown, and eventually die. Treat plants with a commercial pyrethrin spray or dust if the damage is severe. Prevent problems by covering plants with row cover until they blossom.

Larvae of flatheaded borers tunnel beneath the bark, causing wet, sappy areas on the bark of the main trunk. Boring may kill limbs or entire trees. Providing proper care and protecting landscape plants from injury will make them less attractive to the borers. Avoid pruning spring-summer while adults are active. Properly dispose of infested wood material, as beetles may emerge from logs and attack nearby plants.

Notched edges on leaves are caused by insects - Fuller rose beetles. This small, grayish-brown beetle has a cream-colored stripe on each side of its body. It feeds on foliage usually at night time. Larvae usually feed on roots. You can handpick the adults as they hide in foliage during the day. The application of sticky substances at the base of the plant should prevent adults from climbing up the plant. Introduce parasitic nematodes to the surrounding soil to control larvae.