Photo Matthieu Noel

by Matthieu Noel

Responsable marketing EMEA

Botrytis cinerea, Didymella bryoniae, Fusarium spp., Pythium spp., Phytophthora spp., Rhizoctonia spp …some microorganisms are pathogens: they infect crops, injure them, damage the fruit, limit yields and in the worst-case scenario, kill the plant.

But did you know that in the world of microbes, there are microorganisms capable of fighting undesirable fungi? They are called biofungicides.

Zoom on Chlonostachys Rosea J1446 a biofungicide that helps to naturally fight many pathogenic fungi.

1 - Every detail counts in order to win the battle!

Yes, biological warfare is a real battle and, in this battle, anything can tip the balance in your favor.

  • Being first in the field is the first advantage – prevention is a must in biological control.
  • Take up space by growing faster than the enemy(s)
  • Resist higher or lower temperatures better than others
  • Withstand UV damage
  • Know how to fight/have defense mechanisms against enemies when they are faced
  • Embrace teamwork (in synergy with other beneficial microorganisms)

2 - Chlonostachys rosea J1446, the ally of cultures

The fungus Chlonostachys Rosea (formerly named Gliocladium Catenulatum) strain J446 is a strong ally of crops since it possesses a large amount of arsenal necessary to win the battle:

✅ It acts fast. It quickly colonizes the surface of roots, stems, flowers and leaves. It is present in a fairly high density and prevents the development of pathogens that lack space to grow. As a saprophytic fungus, it likes to grow on necrotic tissues.

It doesn’t share. Once it is installed, it prevents anyone from moving in. It feeds on the same substances as pathogens, without damaging the plant. When it arrives first, it empties the stock and does not leave enough food for the pathogens to grow.

It can fight, by parasitizing its enemies. Chlonostachys first wraps itself around the mycelial filaments of pathogens and at the same time produces enzymes that destroy the cells of the pathogens.

It is tough and is more resistant to climate hazards- weather variations and UV rays – than most of its enemies.

It is compatible with many fungal treatments and beneficial microorganisms such as mycorrhizae.


This video shows the growth of Chlonostachys rosea strain J1446 on a tomato leaf treated with LALSTOP G46.

The beneficial fungus first grows on the leaf and then spreads on the favorable growing medium of a petri dish, becoming visible to the naked eye.

Other fungi, especially Botrytis (pathogen), are different in color.

3 - PRESTOP VISION, a kit to see the invisible

Biological control solution for vegetables and ornamental crops.

PRESTOP VISION is a kit that allows producers to check the presence and distribution of the fungus on leaves.

If the white mycelium of Chlonostachys Rosea J1446 appears homogeneously, the spray treatment was effective, as shown in the film.

If you have purchased PRESTOP WG (or LALSTOP G46 WG) and want to test PRESTOP VISION, you contact us here to check if the kit can be available in your area.

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Stay in the loop - part 2