Alexander Tsarev
Mushroom industry


Subscribe to A. Tsarev articles

Saprophytic nematodes

Saprophytic nematodes are not considered to be mushroom pests. With their oral cavity that looks like a tube, they suck in organic nutrients and microorganisms and especially bacteria that exist in great amount in compost and in the casing layer. That is why poorly prepared and pasteurized compost is not well suited for the development of mushroom mycelium, but is a favorable environment for the nutrition and reproduction of nematodes that have survived pasteurization. In nonselective substrate, with overly humid areas, nematode population grows incredibly fast. The toxins they release and the increasing number of putrefactive bacteria weaken the mycelium growth. The same thing can happen when water leaks through the casing layer after watering, which causes the mycelium to suffocate. The compost becomes watery and darkens while theres an objectionable odor in the room because of putrefactive bacteria.

When the infection is severe, the nematodes swarm in great amounts on the casing surface. They form columns that look like erect waving sticks and thin threads that flicker in the light. In this condition, nematodes are able to adhere to flies, mites and personnel that harvest mushrooms.

The swarming of nematodes of the casing surface

The swarming of nematodes of the casing surface
Moreover, nematodes can have the ability to dry slowly and form a cyst; a temporary protective layer due to which they can survive in adverse conditions, being in a dormant state for a long period of time. In this state, nematodes are easily spread by wind. Parthenogenesis, which is the kind of sexual reproduction that allows females to reproduce without males, makes it possible for the nematode population to grow in favorable conditions.

Half-empty beds the result of severe infection of the casing layer by nematodes

Half-empty beds the result of severe infection of the casing layer by nematodes
A poor harvesting technique: that is when mushroom stipes and remains are left on the beds promotes the development of nematodes, hence they will feed on decaying mushroom tissue.


Retaining Mushroom Whiteness

Shafaquath ali, Bengaluru:

My button mushroom although looks white initially, soon in a days time becomes Brown. How to retain...

Mushroom in basement (first part)


what is the influence of NH4 in composting.

Mushroom in basement (first part)


what is the importance of NH4 in spawn run compost. what is the ranage better for good spawn run.

watering first flush mushrooms

Anwer Zaib Karachi Pakistan:

Dear Everybody

How are you
I am Anwer Zaib from Karachi Pakistan
I am interested in Button...

watering first flush mushrooms

ahmet turkey:

watering first flush mushrooms

Ahmet T?RK?YE:


watering first flush mushrooms

shankar khandelwal, sonipat,haryana,indi:



Dear Shahnaz!
If I understand correctly, you have problems in switching from vegetative growth of...

Suhail, Riyadh:

I am trying to build a very small scale white button mushroom farm running on imported Phase 3 compost...

Mushrooms in Kazahstan

Fred Siewert - Almaty:

I am intrested in your mushroom production and would like further contact.I am an interpreneur with my...

© 20032018 Alexander Tsarev

Designed by Volin&Petrova -    .