Lower pest and disease levels by using Potassium Phosphite

For already some years, it is customary to treat irrigation water with chlorine or hydrogen peroxide. Both products are to a greater or lesser extent able to destroy micro-organisms that are present in the irrigation water or the irrigation system. At the commonly used low dosages, especially the effect on algae and bacteria is apparent. The effect on moulds or mildews can however differ.

It still happens that despite continual drip dosages and injections of chlorine or hydrogen peroxide traces of moulds or mildews are found in the irrigation water. This can eventually lead to serious cultivation problems. Increasing the dosage can not solve this problem, as higher dosages also increase the risk of root damage and iron degradation.

It turns out that the resistance of plants against moulds or mildews increases by adding Potassium Phosphite to the nutrient composition. Although Potassium Phosphite is already used for years, the opinion on how to apply the product has recently changed. More and more growers quit adding Potassium Phosphite directly to the fertiliser tank. The main reason for this is that Phosphite in a fertiliser tank transforms to Phosphate pretty quick. And with that, the typical effect (stimulation of the roots to produce antibodies) of Phosphite gets lost.

More often, growers choose to inject the Potassium Phosphite into the irrigation water and add it to the daily stock (just like the application with chlorine and hydrogen peroxide). With this, the grower can be completely sure that the Potassium Phosphite will reach the plant. If you don’t have the possibility to inject Phosphite in this way, then adding it to the fertiliser tank will still be an option, but only if the tank is filled for at least 30% at that moment.

Arend-Sosef offers Potassium Phosphite in liquid form (Multispor PK) and in solid form (Haifa Protek). Please notice that the solid form contains a combination of Potassium Phosphite and Mono Potassium Phosphate. With the use of Haifa Protek you should therefore recalculate the dosage of your Mono Potassium Phosphate. We advice to use 50cc of Multispor PK or 70gr of Haifa Protek per 1000l irrigation water. Please notice that these dosages are based on application by injection into the irrigation water (addition to the daily stock). Start using with a continual dosage. Only after decrease of the pest and disease level, diminish this to a every second week dosage. For more information and personal advice, please contact one of the members of the sales team.

For more information:
Arend Sosef
Stationsweg 23
2675 AM Honselersdijk
T +31 (0)174 630 214
F +31 (0)174 622 656
info@arendsosef.nl
www.arendsosef.nl