Cerospora is known as both Leaf Blight and Leaf Spot . It ’s a common fungus that taint many intellectual nourishment craw including cultivated carrot , texture legume , peppers , corn , soybeans , and coffee . Many gardener and granger are conversant with this disease and with how its sudden appearance can spell day of reckoning for a craw .
Host Plants
There are many host plants in the cornucopia to which Cercospora can attach . Those listed above , especially carrot and legumes , are the most usual . aubergine , tomato , rice , sorghum , cotton , and others are also susceptible to this blight . It can infect plants at any stage of development , ordinarily point leaves , stems , fruits , seedpod and seed .
Symptoms
It manifests in much the same way on every flora infected , though some nuances for individual specie are also potential . In carrot and other thin - riff plants , it will cause the leaf margin to curl and move towards the withers and stems . On encompassing leaves , it will attest as pallid - suntan to gray place in semi - circular shape and circularise to plug into those dots into one orotund blight .
In dark leafage , it can appear as a purplish color with a lighter - colorize heart .
In all suit , as the spots stretch and open to infect most of the folio and/or stem , they will become grey and “ fuzzy ” as spores are shape . industrial plant with a gravid portion of their leaves covered in grey are considered totally infested and “ blighted . ” wipeout is often the only resort .
Creative Commons Flickr photo courtesy of PHOTOFARMER.
Life Cycle
Like most fungus , Cercospora will infect a host flora and grow until spore form . These will be transferred to seed , the ground , mulch , compost , etc . and rest sleeping until conditions are right ( usually tardy spring ) for plague .
Infected plants can seem perfectly tidy until the right humid , damp , strong conditions occur and then the spores and infection can begin quickly and within day have infested much of the emcee .
How This Leaf Fungus Impacts the Plant
On most plant , it will scatter speedily under good conditions and can severely maim or kill the industrial plant within a workweek or two . soft infections can run to infected seeds and fruit , which spread the spore of the blight to the next genesis .
Fruit output will be stunt as will plant and foliation growth . Some plant , if infect early , will die .
How to Prevent Leaf Spot Diseases
As with most fungi , prevention means permit adept aeration around the plant life , proper spatial arrangement between plants , hygienical conduct such as using only clean seeds , and careful management of moisture and lachrymation .
Damp , humid condition are the Cercospora ’s preferent home ground , so water at earth storey is a must .
Treating Cercospora Leaf Spot
Once infected , plants can be treated if it ’s done early . fungicide work well with this blight at this degree . If the plant life is more than 20 % infested , then devastation may be the only alternative to keep other plants from succumbing .
Resources : http://extension.agron.iastate.edu / soya bean / diseases_cercosporasojina.html
http://www.ipm.ucdavis.edu/PMG/r102100211.html
