This fungal transmission is one of the more common in the southerly states and more humid areas of the United States . It affect many types of plants , include flower ornamental and vegetable crop .
Host Plants
mailman of Corynespora can be wide in form . The fungus can taint the leaves , stems , and flower of azaleas and other flowers , tomatoes , papaya , and other crop . It can also sham pumpkin vine , some types of melon vine , etc . It ’s actually a relatively new fungus in the U.S. , having only been identify in 1945 , so it may taint other plants that have not been properly diagnosed .
Symptoms
The first manifestation will be wound on the top Earth’s surface of leaves . These are circular , reddish - purple spots that , with favourable conditions , will spring up and spread chop-chop . When they enlarge , the bushed center becomes browned as the leaf dies . The infection can scatter through leaves to stems and buds , fruit , and flowers .
On fruits , the lesion will appear more gently colored and will in general open more slowly .
Life Cycle
Corynespora , like any fungus , requires humidity and warmth to boom . Spores can lie hibernating through the winter if protect from direct frost ( in mulch , top layer of soil , on seeds , etc ) . Once lucky condition are met , the ontogeny and bed cover of this fungus will happen quickly . In tropic climes , this blight can spread through a garden of tomatoes in less than a calendar week .
How This Plant Disease Impacts the Plant
The leaves are bad damage and often fall from the plant when the foliage spot kills them . flora increment will be stunt and fruit will be light and under - uprise . Flowering plants will often have flowers destroyed quickly by the fungus .
Corynespora rarely kill the host plant , but usually seriously stunt it .
Preventing Leaf Spot Disease
Prevention of any fungus is mostly about aeration and right spatial arrangement . If spacing to allow air stream is given , most fungi will be kept at bay , include Leaf Spot .
Treating Leaf Fungus
commercial-grade options for treatment exist , including fungicides . These are generally in effect on many plants infected with Corynespora . Other methods let in “ droughting ” ( leaving the plant in full sun with no water system for 2 - 3 days ) , which has circumscribe results .
Quarantine and end of infected flora is also an effective way to write a crop .
resource : http://mrec.ifas.ufl.edu / leafage / resrpts / rh_93_12.htmhttp://www.freshfromflorida.com / pi / enpp / pathology / pathcirc / pp42.pdf
Flickr Creative Commons photo courtesy of PHOTOFARMER.
How to controlcorynespora on cucumber vine .
