Lettuce Plant Diseases

Diseases Affecting Lettuce Plants. Diseases affecting lettuce plants are either bacterial or fungal.

Powdery Mildew Of Lettuce Plant Diseases Powdery Mildew Plant Leaves

Treat these lettuce diseases by spacing the plants apart to provide airflow and by reducing the amount of irrigation the.

Lettuce plant diseases. Bidens mosaic virus Cucumber mosaic virus Turnip mosaic virus. The states warm and moist climate provides the perfect environment for diseases to develop. Leaf spots may have chlorotic halos.

Mosaic Lettuce mosaic virus. Fungal lettuce diseases such as damping off or sclerotinia drop white mold are caused by soil borne fungi that thrive in cool damp soil and are primarily lettuce seedling diseases. Also known as Soft Rot White Mould.

On the attacked plants can be observed bleaching spots that give the plant a mosaic look. However growing lettuce involves pest management and more importantly disease management. If plant is severely infected lesions may coalesce forming large necrotic patches wilting leaves and plant death.

Other diseases can be very damaging in certain cropping situations either regularly or occasionally such as ring spot powdery mildew and pythium root rot. Among the virus diseases transmitted by green peach aphids are potato leaf roll potato virus Y beet mosaic beet yellows and lettuce mosaic. Big vein Lettuce big vein virus.

Greenfly can sometimes be a problem and slugs or snails can do great damage especially to young crops. Elizabeth Macarthur Agricultural Institute Menangle April 2008 Gplpphds datalettuce projectfinal report VG04012-1 LT 19052008 1. Lettuce crops can be attacked by several fungal and Oomycete diseases the principal ones being downy mildew grey mould and sclerotinia.

High temperatures and too much nitrogen can aggravate tipburn injury. Edges of inner head lettuce leaves are brown and rotten. Soil-borne Sclerotinia sclerotiorum and S.

Diseases in hydroponic lettuce HAL Project VG04012 Len Tesoriero et al. Calico Alfalfa mosaic virus. And provided plant samples for disease surveys.

Lettuce leaf drop Credit. Necrotic yellows Lettuce necrotic yellows virus. Fungus Gnats surprisingly the adult fungus gnats are not harmful but their larvae feed on roots and feeder roots which can slow plant growth invite bacterial infectionand if take to extremeeven plant death.

Botrytis grey mould Sclerotinia rot. Small irregularly shaped chlorotic spots on oldest plant leaves which enlarge and turn brown and dry out. While lettuce is susceptible to many issues theyre usually not life-threatening to the plant.

Miller The Ohio State University. Here are the ones you should definitely watch for. These diseases range from serious ones such as downy mildew to minor diseases such as bottom rot.

Now that youve learned a little about these hydroponic pests lets talk about how to get rid of them. Rust lettuce mosaic virus. Lesiuons may fall out of leaves creating holes.

Internal rib necrosis. Most of the spots can be observed on the spaces between the nerves. Unfortunately lettuce is one of those plants that struggles with numerous common diseases.

Tipburn is a physiological disorder caused by soil calcium deficiency. Root aphids are not visible to the naked eye and can also do great damage LETTUCE DOWNY MILDEW AND MOULDS. Viral and viroid diseases.

Plant lettuce in shadows of taller crops. Usually not visible form outside of head. Amongst the most common diseases of lettuce are mildew and moulds.

Ring necrosis Presumed viral agent not identified. In severe cases appear colorless spots in the spaces between the nerves and even burns. The symptoms appear at temperatures above 20 degrees Celsius.

Miller The Ohio State University Lettuce leaf drop Credit. Life History Adults pass the winter on greens and wild hosts such as cabbage collards turnip wild mustard and.

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