Lettuce Plant Diseases

August 11, 2021 Post a Comment

Treat these lettuce diseases by spacing the plants apart to provide airflow and by reducing the amount of irrigation the. Life History Adults pass the winter on greens and wild hosts such as cabbage collards turnip wild mustard and.

Plant Disease Identification Guides Plant Diseases Garden Pests Identification Garden Pests

The symptoms appear at temperatures above 20 degrees Celsius.

Lettuce plant diseases. Elizabeth Macarthur Agricultural Institute Menangle April 2008 Gplpphds datalettuce projectfinal report VG04012-1 LT 19052008 1. Unfortunately lettuce is one of those plants that struggles with numerous common diseases. Root aphids are not visible to the naked eye and can also do great damage LETTUCE DOWNY MILDEW AND MOULDS.

On the attacked plants can be observed bleaching spots that give the plant a mosaic look. Most of the spots can be observed on the spaces between the nerves. However growing lettuce involves pest management and more importantly disease management.

Calico Alfalfa mosaic virus. Lesiuons may fall out of leaves creating holes. Leaf spots may have chlorotic halos.

While lettuce is susceptible to many issues theyre usually not life-threatening to the plant. Soil-borne Sclerotinia sclerotiorum and S. 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.

The states warm and moist climate provides the perfect environment for diseases to develop. Plant lettuce in shadows of taller crops. Also known as Soft Rot White Mould.

Other diseases can be very damaging in certain cropping situations either regularly or occasionally such as ring spot powdery mildew and pythium root rot. Rust lettuce mosaic virus. Now that youve learned a little about these hydroponic pests lets talk about how to get rid of them.

Ring necrosis Presumed viral agent not identified. Viral and viroid diseases. Miller The Ohio State University.

Small irregularly shaped chlorotic spots on oldest plant leaves which enlarge and turn brown and dry out. In severe cases appear colorless spots in the spaces between the nerves and even burns. And provided plant samples for disease surveys.

Diseases Affecting Lettuce Plants. Internal rib necrosis. High temperatures and too much nitrogen can aggravate tipburn injury.

Diseases affecting lettuce plants are either bacterial or fungal. 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. Botrytis grey mould Sclerotinia rot.

Mosaic Lettuce mosaic virus. Lettuce leaf drop Credit. Tipburn is a physiological disorder caused by soil calcium deficiency.

Greenfly can sometimes be a problem and slugs or snails can do great damage especially to young crops. Big vein Lettuce big vein virus. Among the virus diseases transmitted by green peach aphids are potato leaf roll potato virus Y beet mosaic beet yellows and lettuce mosaic.

Bidens mosaic virus Cucumber mosaic virus Turnip mosaic virus. Diseases in hydroponic lettuce HAL Project VG04012 Len Tesoriero et al. These diseases range from serious ones such as downy mildew to minor diseases such as bottom rot.

Amongst the most common diseases of lettuce are mildew and moulds. Lettuce crops can be attacked by several fungal and Oomycete diseases the principal ones being downy mildew grey mould and sclerotinia. Usually not visible form outside of head.

Edges of inner head lettuce leaves are brown and rotten. Here are the ones you should definitely watch for. Necrotic yellows Lettuce necrotic yellows virus.

If plant is severely infected lesions may coalesce forming large necrotic patches wilting leaves and plant death. Miller The Ohio State University Lettuce leaf drop Credit.

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