These proteins can for example kill certain bacteria. The concentration of SA in the plant must reach a certain level before the ‘switch’ is turned on in the plant and it actively starts producing these proteins. By adding SA to the plant from the outside, either by spraying the leaves or administering through the roots (in inert substrates only), the concentration of SA increases throughout the plant. Salicylic acid is 100% systemic.
If the plant is infected again after treatment it needs to produce just a very small amount of SA to start producing its own defence proteins. The plant is therefore able to respond much more quickly and powerfully to an infection. Stimulation of the plant’s own defence mechanism (SAR) by applying SA is proven to be a highly effective way of dealing with fungi and bacteria.
Boosting the plant’s natural immune system using SA is particularly effective in the case of biotrophic fungi such as powdery mildew, downy mildew, Fusarium, Alternaria, Mycosphaerella, Cylindrocladium and all types of rust. It also limits the development of red spider mite, gall mite, whitefly and lice by 25% – 40%. This also enables predator mite to get the red spider mite plague under control, for example.
Immunity to botrytis takes place via the jasmonic acid signal pathway. We therefore recommend not using ArgicinPlus or SalicylPure for this fungus as these products will have no effect. What does help is to apply Cuprum to stimulate the production of defence proteins via the jasmonic acid signal pathway.
Finally, salicylic acid encourages the plant to form extra callus. This property is used for example in the tomato growing sector as the wounds produced when the leaves are broken or cut off dry out more quickly, with wound tissue even produced along the edges of the wound. The result; botrytis has no chance.