Horsetail (Equisetum arvense) is a perennial herbaceous plant whose name 'arvensis' in Latin means "of the prairie, field or grassland". It is a fungicide that has high silica content in addition to potassium and calcium. It improves the structure of the plant acting directly on the roots making it more resistant. It has been traditionally used in a multitude of medicinal remedies.
Its richness in organic acids such as nicotine, palustrin, etc. and equisetonin as fungal toxin should be noted. These components make Horsetail one of the most effective fungicides. Horsetail also acts as an insecticide against aphids and red spider.
Silicon reduces the effects of excess water around plants that leads to the appearance of fungi. Thus, the high percentage of silica in the plant reduces the impact of moisture. The appearance of fungi is more frequent with high humidity and long periods of rain. In these cases, horsetail is used as a preventive measure against fungal-related diseases and to reduce the need for sulfur applications.
It is sprayed as finely as possible covering the most amount of plant and leaf surface. Horsetail extract serves as a means of stabilization for plants and for the prevention and control of sucking parasites. The high content of silicic acid strengthens the cellular structure of plants and makes it harder for parasites to destroy the surface of the plant. For the production of the liquid extract, it should be boiled for approximately 20 minutes in water, in which way the silicic acid is released.


When silicon accumulates on the walls of epidermal cells, it seems to decrease perspiration, as well as fungal infections. In the leaves of the plants, silicon is deposited above the epidermal cells and below the cuticle (layer that limits the loss of water by the leaves, and hinders the penetration and development of fungal hyphae).
Due to the above, we can affirm that silicon, in addition to its physical functions in the soil and in the development of plants, acts as a preventive fungicide against infections, and protects plants against attacks by insects that cause damage to the epidermis of the crops.
Silicon (SiO2) can also be found in our Vermiorganic humic acids, made with Leonardite in the form of organic silicates of chelated microelements, with high contents of assimilable monosilicic acid.

The beneficial effects of silicon on the growth and development of plants are scarce under optimal conditions, however, it is extremely important in stressful situations. This is because silicon is deposited on the cell walls of the xylem vessels and prevents them from compressing under conditions of high perspiration caused by drought or thermal stress. The silicon-cellulose membrane in the epidermal tissue of the leaves also protects the plant tissues against excessive loss of water by perspiration due to a reduction in the diameter of stomatic pores. Regarding the physiology of plants, silicon acts as a protector and regulator of photosynthesis and other enzymatic activities.


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