Diseases and Management of Crops under Protected Cultivation

(Diseases and Management of Crops under Protected Cultivation)
Color Spots
Yellow spots can occur on the outer surface of the fruit.
High incidences occur in summer and in plants grown in high densities with high levels of
N.
Management
Avoid capsicum varieties susceptible to this disorder
Misshapen fruit
Due to too cool or too warm weather conditions.
The development of growths within the capsicum usually results from abnormal tissue
development in the honey gland of the fruit.
Management
Ensure that all environmental targets are met and maintained.
“Elephant Foot”-A disorder in soilless capsicum
A physiological plant disorder not known to occur in soil-grown plants.
“Elephant’s Foot” disorder most likely requires a localized zone around the stem base with
high humidity and / or salt accumulation.
The affected wounded tissues at basal stem are susceptible to entrance of pathogens (that
might be carried by a vector, i.e. Fungus gnats) leading to rot which collapses vascular
system and plant wilts.
Management
• Lower the humidity and salt concentration in the soilless media.
Diseases and their Management
Damping-off
Caused by species of Pythium and Rhizoctonia solani.
Common in soil grown crops.
In pre-emergence damping-off areas in nursery are seen where no seedlings have
emerged.
Damping-off in young, emerged, seedlings is seen as a toppling over of the seedlings when
root systems are destroyed by the fungi.
Management
Maintain proper sanitation practices in greenhouse.
Provide optimal soil temperature, watering etc. to the plants.
Avoid the conditions where young plants are stressed.
Fusarium stem and Fruit rot
Caused by Fusarium solani
Soft, dark brown or black lesions on the stems at nodes or wound sites.
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