Designation for substances that increase or strengthen the resistance of plants to harmful organisms. However, they must not have a direct effect on harmful organisms or pathogens, as they would otherwise be subject to much stricter regulations as plant protection products. According to their effect, there are inorganic (for example, cell wall-strengthening rock flour and water glass or carbonates such as potash or chalk), organic (for example, dried plants, plant extracts, plant oils, whey, egg white, propolis and plant hormones such as auxins and gibberellins), homeopathic (organic and inorganic substances in minute quantities) and microbial-based (for example, fungi and microorganisms) agents. Such agents are used within the framework of organic plant protection and integrated plant protection, which in turn are part of organic and the special forms of biodynamic and bioenergetic viticulture.
Using the encyclopaedia is not only time-saving, but also extremely convenient. What's more, the information is always up to date.
Markus J. Eser
Weinakademiker und Herausgeber „Der Weinkalender“