Phytophthora cactorum

Causes crown rot in strawberries.

For propagating tray plants, we recommend:

  • treating the mother plants with Argicin®Plus twice (at an interval of seven days) before taking the cuttings
  • submersing the fresh cuttings in a solution of 1 litre of Argicin®Plus in 100 litres of water for 15 minutes
  • spraying three times with Argicin®Plus (at intervals of seven days) after planting the cutting in trays


For production on substrate, our advice is to:

  • submerse the tray plants in a solution of 1 litre of Argicin®Plus in 100 litres of water for 15 minutes before planting,
  • start drip feeding 1 litre of SalicylPure/ha/week on the third or fourth day after planting


This comprehensive course of treatment accelerates initial growth of the plants by 30–40%, with more leaf, more root, more photosynthesis and more plant. Continue drip feeding with SalicylPure once a week during production to help the plant maintain this head start. This resulted in an extra 9–10% more kilos of Elsanta harvested per hectare in a gutter production system. These extra kilos were not just due to larger fruit, but the fruit were firmer and had a consistently high Brix value. In this way, therefore, better use is made of the potential your plant grower invests in the tray plant.

For outdoor propagation, we recommend:

  • treating the mother plants with Argicin®Plus twice (at an interval of seven days) before taking the cuttings
  • submersing the fresh cuttings in a solution of 1 litre of Argicin®Plus in 100 litres of water for 15 minutes
  • spraying three times with Argicin®Plus (at intervals of seven days) after planting the cuttings out
     

This provides the cutting with the best possible chance of taking root and growing in the field at a time that it is subjected to the most invasive process with the highest risk of infection.

For outdoor strawberry production:

  • submerse the defrosted frigos or AA plants in a solution of 1 litre of Argicin®Plus in 100 litres of water for 15 minutes before planting and
  • immediately after planting and until the first fruit begin to colour, spray weekly with Argicin®Plus, then
  • switch to spraying with our Ds-mix
     

In 2014, DLV Plant (now Delphy) and Berry Plaza conducted a practical test in gutter production. It showed similar results to other tests: a more vital crop, producing more sugars and heavier fruit.
The outcome of these results is that more and more strawberry growers are applying our products.