Lettuce Plant Diseases

Calico Alfalfa mosaic virus. Elizabeth Macarthur Agricultural Institute Menangle April 2008 Gplpphds datalettuce projectfinal report VG04012-1 LT 19052008 1.

Septoria Leaf Spot Of Tomato Plant Pests Tomato Blight Plant Leaves

Root aphids are not visible to the naked eye and can also do great damage LETTUCE DOWNY MILDEW AND MOULDS.

Lettuce plant diseases. Plant lettuce in shadows of taller crops. High temperatures and too much nitrogen can aggravate tipburn injury. Here are the ones you should definitely watch for.

Lettuce crops can be attacked by several fungal and Oomycete diseases the principal ones being downy mildew grey mould and sclerotinia. On the attacked plants can be observed bleaching spots that give the plant a mosaic look. Mosaic Lettuce mosaic virus.

Necrotic yellows Lettuce necrotic yellows virus. Rust lettuce mosaic virus. Usually not visible form outside of head.

While lettuce is susceptible to many issues theyre usually not life-threatening to the plant. Viral and viroid diseases. Diseases in hydroponic lettuce HAL Project VG04012 Len Tesoriero et al.

Bidens mosaic virus Cucumber mosaic virus Turnip mosaic virus. If plant is severely infected lesions may coalesce forming large necrotic patches wilting leaves and plant death. 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.

Miller The Ohio State University Lettuce leaf drop Credit. Tipburn is a physiological disorder caused by soil calcium deficiency. These diseases range from serious ones such as downy mildew to minor diseases such as bottom rot.

Diseases affecting lettuce plants are either bacterial or fungal. The states warm and moist climate provides the perfect environment for diseases to develop. Small irregularly shaped chlorotic spots on oldest plant leaves which enlarge and turn brown and dry out.

Leaf spots may have chlorotic halos. Most of the spots can be observed on the spaces between the nerves. Treat these lettuce diseases by spacing the plants apart to provide airflow and by reducing the amount of irrigation the.

And provided plant samples for disease surveys. Unfortunately lettuce is one of those plants that struggles with numerous common diseases. However growing lettuce involves pest management and more importantly disease management.

Diseases Affecting Lettuce Plants. Big vein Lettuce big vein 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.

Edges of inner head lettuce leaves are brown and rotten. Miller The Ohio State University. Also known as Soft Rot White Mould.

Life History Adults pass the winter on greens and wild hosts such as cabbage collards turnip wild mustard and. Among the virus diseases transmitted by green peach aphids are potato leaf roll potato virus Y beet mosaic beet yellows and lettuce mosaic. Lettuce leaf drop Credit.

Botrytis grey mould Sclerotinia rot. Amongst the most common diseases of lettuce are mildew and moulds. Internal rib necrosis.

Ring necrosis Presumed viral agent not identified. Soil-borne Sclerotinia sclerotiorum and S. In severe cases appear colorless spots in the spaces between the nerves and even burns.

Lesiuons may fall out of leaves creating holes. Other diseases can be very damaging in certain cropping situations either regularly or occasionally such as ring spot powdery mildew and pythium root rot. The symptoms appear at temperatures above 20 degrees Celsius.

Now that youve learned a little about these hydroponic pests lets talk about how to get rid of them. Greenfly can sometimes be a problem and slugs or snails can do great damage especially to young crops.

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