Blogue de Sun Gro

Root Zone Disease Management—Go Biological or Not?

Read More in The Sun Gro’er Issue 1/2 (2003)
In recent months there has been a lot of hype in industry journals and trade shows about biological fungicides (BFs). The intention of this article is to provide some background information on these types of products and also to provide some guidance in determining if biological fungicides are right for you or your customers.
A biological fungicide (BF) is a living organism that is used to suppress or control a plant disease typically caused by a pathogenic (disease-causing) fungus. Biological fungicides utilize microorganisms from one of two groups – fungi or bacteria. The most common root diseases found in greenhouse production are Pythium, Phytophthora, Rhizoctonia, Thielaviopsis, and Fusarium.
Continue reading « Root Zone Disease Management—Go Biological or Not? »

Media, Tissue and Water Testing for Good Growing

Planting flowersRead More in The Sun Gro’er Issue 1/2 (2003)
When do most growers test media, tissue or water in the greenhouse? If your answer is “only when there is a problem”, you are probably right. However, that is not the only time that growers should be testing. Growers should be testing at least for media pH and EC on a weekly or bi-monthly basis (on-site testing) and should also be conducting complete tests 2 or more times per crop for major crops (complete lab analysis).
Tests should not be limited to media pH and EC, but also to water alkalinity, EC and pH. This is especially important if growers are having problems maintaining pH in their mixes. Knowing the alkalinity of the water and fertilizing according to the alkalinity goes a long way in helping assure a successful, high quality crop. This is a separate topic in and of itself.
Continue reading « Media, Tissue and Water Testing for Good Growing »