Alexander Tsarev
Mushroom industry

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Yellow mold

Myceliophthora lutea, Chrysosporum merdarium, Sepedonium chrysospermum, Hypomyces chrysospermum

There are many kinds of yellow mold, which, if appear in great amounts, can cause a considerable yield loss.

The symptoms of this disease are yellow or tawny spots of fungi, usually with white fluffy edges, that appear on the compost. Other kinds of this disease have canary and sulphur colors. On the primary stage of development, the white fungus looks a lot like mushroom mycelium. As it develops further, the fungus changes its color, the spots merge and turn into a fallow color layer that is similar to the mycelium stroma between the casing layer and compost. Beds which are rich with yellow mold emit a strong metallic smell, similar to carbide or verdigris.

In most cases, the thin mushroom mycelium disappears from the casing layer and a great amount of pins die early.

Yellow mold produces a great amount of spores, which are easily carried by wind, flies, on personnel’s clothes and infect the compost again. It is considered that the spores of this mold are resistant to high temperatures, and that is why it’s rather hard to get rid of it.


The first signs of the yellow mold infection


The first signs of the yellow mold infection


The first signs of the yellow mold infection


Yellow mold in a bag of compost


Yellow mold mycelium in infected compost


A shelf with grown compost affected with yellow mold
Yellow mold usually appears when the temperature during pasteurization has been too low, that is, when compost wasn’t heated to the required level, or didn’t remain at the needed temperature for long enough. The compost structure also affects the development of yellow mold. Yellow mold is more often seen on heavy and greasy compost, than on light and dry compost.

It’s impossible to control yellow mold disease during mushroom cultivation. The infected batches must be steamed as soon as possible.

All efforts must be made so as no to allow the appearance of yellow mold on a farm.

Comments

amir ommati:

thx a lot for your best answer to my mr tsarev.
1-for your first qustion i saw mycogone in day 13...

Царев Александр Владимирович:

Dear Amir Ommati!
On which day after the application of peat to compost, the first signs of a mikogon...

Царев Александр Владимирович:

Dear Fouzi
You will be contacted by my partner. He is an Arab and you will be comfortable with him...

watering first flush mushrooms

linda:

sir pliz tell me about the irrigation requirements of the mushroom cultivated in plastic bags with straw...

Царев Александр Владимирович:

Dear Emmanuel Chimanga!
I'm sorry that I could not immediately answer you. The usual depth of...

Царев Александр Владимирович:

Dear Fouad Dagher
Tunnels of 2 phases (pasteurization) of compost are made at the location of the...

Царев Александр Владимирович:

Dear Ali Karim!
I apologize for not being able to answer you right away.
Please send more information...

Царев Александр Владимирович:

Dear Hai Nguyen!
The usual depth of the cover layer is 4-6 cm. Weight is 26-30 kg per 1 m2. It depends...

Царев Александр Владимирович:

Dear Shahar!
I do not use formalin for a long time. The best way to disinfect the growth chambers...

Царев Александр Владимирович:

Dear Tejpal!
These mites usually live in the feathers of chickens. If there was a lot of cold compost...

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