Fungal plant diseases occur when conditions conducive to the survival of the fungi are present and are closely linked to the weather. Fungicides are used in many situations including to prevent or control plant diseases and maximise yield and quality in crops grown for food and for managing healthy turf and ornamental plants.
‘Contact’ or ‘protectant’ fungicides are designed to prevent fungal disease from taking hold by forming a protective layer on the outside of plants and preventing the fungus from entering and damaging plant tissue. The fungicide must come into direct contact with the fungus and will have to be re-applied to new plant tissue as the plant grows or if the product is washed off. Although they can slow or stop the development of new symptoms, many of these fungicides only prevent disease, so must be applied prior to infection as they are not highly effective after symptoms have developed.
‘Systemic’ or ‘penetrant’ fungicides are absorbed by the plant and are able to move from the site of application to other parts of the plant to protect from the inside. A fungicide may also be described as having ‘curative’ properties if it offers the ability to control disease when applied immediately post-infection or when symptoms are first observed.
The disease in question should be carefully identified before treatment to ensure the most effective outcome is achieved. Before using a fungicide to manage disease, be sure to seek advice from your local CRT store to ensure that you choose the most suitable and cost effective option for your situation, including information regarding crop or plant safety, any harvest or grazing withholding periods and best practice in terms of managing fungicide resistance.
At CRT, we know fungicides, and we are here to help, so call into your local store and ask them for a disease management solution that is right for you