Diseases and Management of Crops under Protected Cultivation

(Diseases and Management of Crops under Protected Cultivation)
• 0.2% Mancozeb
• 0.1% Blitox 50 (copper oxychloride)
• 0.1% Bavistin
Anthracnose
• Caused by Colletotrichum capsici
• Seed born.
• Water-soaked lesions on fruit that become soft and slightly sunken.
• Concentric rings within the fruit spots.
Management
• Avoid alternate host and infected plant debris in polyhouse
• Optimize the humidity in polyhouse.
Bacterial soft rot
• Caused by Erwinia carotovora
• The fleshy fruit peduncle is highly susceptible and is frequently the initial point of infection.
• Initially, the lesions on the fruit are light to dark-colored, water-soaked, and somewhat
sunken.
• The affected fruit hang from the plant like a water-filled bag.
Management
• Use chlorinated wash water to reduce populations of soft rot bacteria and to reduce the risk
of infection during washing.
• Allow fruit to dry thoroughly.
• During packing and storage, the fruit should be kept clean and maintained in a cool, dry
place.
Pepper Mild Mottle Virus (PMMV)
• Symptoms include the development of obvious bumps on the fruit as well as color
streaking and green spotting as the fruit matures.
• Fruit tend to have pointed ends and may also develop sunken brown areas on the surface .
Management
• The virus is spread by the routine handling of the young plants, especially at transplanting.
• Do minimum mechanical activities during cultivation.
• Grow resistant varieties.
Tobacco Mosaic Virus
• The symptoms of infection first appear on the leaf as a necrosis along the main veins
accompanied by wilting and leaf drop.
• New growth on the plants may exhibit mosaic symptoms as well as distorted growth.
Management
• Use disease-free seed.
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