What is wrong with my calla lily?

Are the base of stems infected at or below the soil line, causing general chlorosis of foliage?

Are there any water-soaked, brown lesions on the leaves, the center of leaves is breaking down?

Are there any mosaic patterns in leaves, which may be severely distorted?

Are the foliage, petioles, and flower stalks streaked or spotted by whitish or yellowish areas, and sometimes by small, concentric rings?

Are the leaves yellowing, wilting and, dying?

Are the leaves pale on their upper side and are there any dusty blisters on the undersides?

Are the leaves distorted and yellow?

Do the leaves have silvery pallor?

Do the leaves have large, ragged holes in them?

Crown rot (caused by Rhizoctonia solani) is a fungal disease favored by warm, moist conditions. Fungus is present in most field soils. Avoid deep planting and overwatering. Treat soil with PCNB before planting.

Bacterial soft rot is caused by a bacterium that is common in most soils, particularly if the area is frequently planted with susceptible crops. Remove and destroy infected plants. Avoid planting in poorly draining soil. Rotate crops with corn, small grains, or grasses where possible. Treat soil with an insecticide before planting to reduce damage caused by grubs and larvae which promotes bacterial soft rot.

Dasheen mosaic (caused by Dasheen mosaic virus) is Common because Callas are frequently propagated vegetatively, which spreads the virus. A virus is spread by aphids. Spread in planting can be rapid. Can be transmitted by sap but not by seed. Obtain or develop virus-free plants by heat treatment and tissue culture. Control aphids. Remove infected plants.

Spotted wilt (caused by Tomato spotted wilt virus and Impatiens necrotic spot virus) is common because Callas are frequently propagated vegetatively, which spreads the disease. Both viruses are also transmitted by several thrips species. The virus is acquired by the nymphal stage and transmitted by an adult throughout its life. The virus has a very wide host range including many weeds and ornamental plants. Control weeds and thrips. Destroy infected Callas.

Yellow leaves that wilt and die usually indicate Root rot disease. Poorly drained, overly wet soil promotes rot so choose well-drained sites and add organic matter to improve drainage. Remove and destroy infected plants. Solarize the soil before replanting.

Likely cause for these symptoms is a fungal disease - Rust. Provide good air circulation around plants by thining them. Avoid making leaves wet when watering. All infected leaves should be removed. Spray leaves with sulfur early in the season to prevent rust or to treat mild infections.

Distorted, yellow leaves are caused by aphids. These tiny insects cluster under leaves and on growing tips where they feed on plant sap. Leaves, stems, and buds get distorted, and later leaves and flowers drop from the plant. 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.

Large, ragged holes in the leaves are caused by slugs and snails. Slugs and snails feed on the plant leaves usually at night. To control slugs and snails use diatomaceous earth around your plants. You can also handpick them during the night or use shallow dishes filled with beer as a trap.

Leaves stippled with yellow are caused by spider mites. These tiny, spider-like pests feed by sucking sap from the underside of the plant's leaves. You can control spider mites by spraying plants thoroughly with water 2-3 times a day for several days. For severe infestations, spray plants with insecticidal soap.