2H13®
What is 2H13?
2H13 is a newly authorised additive in Germany and Austria (BVL and FiBL). 2H13 consists of granulated cells of the yeast strain Meyerozyma guilliermondii 2H13.
Effect of 2H13
2H13 improves the effectiveness of copper when used against oomycetes (late blight on potatoes, vine pernospora) and the effectiveness of sulphur against storage scab and storage rot on apples. It is authorised as an additive to copper- and sulphur-containing fungicides and fungicidal single-site inhibitors at an application rate of 0.05% in the spray mixture (0.5 g/l) in fruit, vine, vegetable and ornamental plant cultivation and arable farming. The application rate of copper can be reduced to approx. 50 - 65% of the full application rate without any loss of efficacy.
When added to fungicides, 2H13 improves the spraying behaviour and the deposition of the active ingredients on the plant surface. This improves the biological effectiveness of fungicides.
Additive 2H13 improves the effectiveness of copper and sulphur-containing fungicides
Mixability of 2H13
Miscibility is product-specific. A current list of tested miscibilities can be found here.
If products are not listed, we will carry out miscibility tests.
Numerous trials prove the effect
Successful trials have already been carried out in potatoes, grapes, apples and cucumbers. The effect of 2H13 is also being tested in strawberry cultivation. We assume that the addition of 2H13 to fungicides against Botrytis cinerea in strawberries will improve the effect and slow down the development of resistance to the fungicides.
Late blight on potato plants (Phytophthora infestans)
Use of 2H13 in potatoes
Numerous trials show that the addition of 2H13 to copper treatment in potatoes against late blight (Phytophtora infestans) improves the effect. With a reduced amount of copper, the addition of 2H13 was found to maintain the same effectiveness.
Higher yields in potatoes with 2H13
The calculation of 16 trials showed that the addition of 2H13 had a significantly positive effect on yield. The yields were on average 7% higher compared to the solo copper treatment.
Use of 2H13 in wine cultivation
In organic wine growing, 2H13 can be used to control downy mildew (Plasmopara viticola). By adding 2H13 to the copper treatments, the amount of copper can be reduced to 2/3 of the standard amount while maintaining the same effect. The effect on grapes is significant. On grapevine leaves, 2H13 achieves a 7% improvement in efficacy.
Use of 2H13 in apple cultivation
In the control of storage scab and storage rot in apples, 2H13 supports the effect of the agents used. Numerous trials are now available. In summary, the results show that
- Neofabraea alba (Gloeosporium) in apple wounds Significant improvement in the effect of net sulphur through the addition of 2H13.
- Neofabraea perennans (Gloeosporium) in apple wounds Improvement of the effect of Flint and Geoxe by the addition of 2H13 to the fungicide.
- Monilia fructigena in apple wounds Significant improvement in the effect of net sulphur by adding 2H13 compared to the control.
- Significant improvement in the effect of Geoxe through the addition of 2H13. The experiment was carried out with the multi-resistant strain Bc73 (see Fig.).
Use of 2H13 in berry cultivation
In berries, the addition of 2H13 to botryticides from flowering onwards can prevent the development of resistance and improve the fungicide effect. This can improve the control of grey mould (Botrytis cinerea), even in fungicide-resistant strains. This effect is derived from trials in apples and will be further tested in 2024.
