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Alternaria leaf spotsometimes touch to asearly blight is a conditionthat can feign a wide multifariousness of industrial plant in the garden .
Various fungal pathogen species make Alternaria .
dissimilar species impress dissimilar type of plants , but overall , the various species of Alternaria fungus cause far-flung terms to :
The pathogens also sham a wide variety of herbaceous unfolding plant .
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How To Tell If Alternaria Fungi Have Attacked Your Plants?
The disease symptom make by this pathogen depart somewhat from innkeeper - to - host . However , they are similar enough to be recognizable on any plant .
On most plants , you ’ll acknowledge expectant moody chocolate-brown or black spots modernize on Old leaves .
The spot may be either angulate or rotary , and extend growing larger until they pass on a sizing of about a half an inch across .
Soon after this , they begin to develop dark - colored , concentric bridges or rings . impairment induce by the Alternaria pathogen sometimes looks like a fair game .
On chrysanthemum and tomatoes , you ’ll see spots made up of concentric rings .
On variousspecies of calendula plants , you ’ll see tiny purplish / red touch .
The growth of lesion unremarkably affects easy leaf tissue . It may not be able to eat through large vena in the parting .
Unless stopped in its tracks , the fungus do leaves to become yellow and shrivelled . Soon they deteriorate off the plant altogether .
How To Be Sure Alternaria Is Causing The Damage?
One way to tell that the leaf blot are triggered by fungous infection is that the spots are often covered with velvety , colored - discolor spore ( conidium ) .
Damage because of Alternaria fungus is not just limited to leaves . It may also cause lesions on potatoes underground .
to boot , it can causerotten spot around tomato industrial plant stems . These lesions , too , are often occupy with conidia spores .
Where Does This Alternaria Leaf Spot Fungus Come From?
The life cycle of the fungal pathogen can winter and survive for long periods in infected plant rubble left on the surface of the soil .
It can also outlast when immerse under the soil , or deport on seed .
In the spring , the fungal spores can blow from infected plants to sizeable plants in the wind .
Additionally , they can travel in water sprinkle up from infected dust on the ground .
Spores may also thrive and multiply during period of very in high spirits humidity , long rainy season and heavy dew .
The temperature most contributory to fungous spore ontogeny and reproduction rate from 65 ° to 73 ° degrees Fahrenheit .
What Can You Do About Alternaria Infection?
An integrated plague management solution of “ Prevention ” is the best cure for this job .
Although these pathogens can overtake entire crop and cause a cracking lot of damage , they are quite imperfect .
preserve your crops healthy by :
If all else fail , talk with your county agent about an appropriate chemical substance command fungicide to treat the species of pathogen you are combat .
detail such as the type of crop grown , the condition of the soil , along with the species of the pathogen will affect the sort of fungicide appropriate for use and dominance .
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