Agrimm Technologies Ltd



Harpin aβ plant defence signalling protein.

Proact Is a broad spectrum plant defence signalling molecule.

  • Utilises Harpin protein active ingredient.
  • Foliar sprayed to induce a systemic disease resistance response in the plant
  • Massively increases calcium mobilisation in the host plant
  • To be applied with calcium for best results
  • Helps reduce cherry splitting after rain events.
  • No mrls and safe to use
  • Apply as a foliar spray via normal agricultural spray equipment.
  • Do not apply during rain. Rain fast in 30 minutes.
  • Use a water rate which is adequate for good coverage.
  • Mix ProAct in half filled mix tank with clean water and agitate until dissolved. ProAct is compatible with many products just ensure the tank pH is between 5 and 10. Add remaining water to tank mix and apply promptly.
  • Cherries, apply 100g/Ha with calcium weekly from straw colored fruit until harvest.
  • Apple and stone fruit, apply 150-200g/Ha up to 5 times per season.
  • Calcium and nutrient uptake boost for all crops, apply 10-100g/Ha with calcium.
  • Compatible with conventional fungicides and insecticides.

What is it and how does it work?

What is it?

ProAct is a wettable powder consisting of Harpin αβ protein active ingredient. This  plant signalling protein was originally derived from plant pathogenic bacterium in the 1990’s and first registered in 2000.

The harpin protein binds to receptors present in all agronomically important crops including vegetables and field crops, tree fruit and vines, turf and ornamental crops.

Proact is a very well researched and proven product in international markets.

Agrimm is the sole agent for Proact and Myconate in New Zealand and Australia.

How does it work?

ProAct triggers a robust defence mechanism within plants, stimulating a broad-spectrum immune response. When the Harpin protein molecule contacts the plant, it will bind to the receptor sites on the plant and trigger the plant’s own defence mechanisms.

These receptors react by sending signals to the rest of the plant. With these signals, there is initially a fast release of cellular calcium and also an increase in plant metabolic activity and photosynthesis.

The subsequent improvement in nutrient uptake stimulates a vigorous growth response and increases cell wall strength and elasticity.

These responses can help combat bacterial, fungal and viral stresses on the host plant. One of the mechanisms triggered is what’s known as a calcium signalling cascade in the plant which triggers the plant to mobilise large amounts of calcium throughout the plants system which strengthens cell walls.


Key Features

Increased Photosynthesis.

Enhanced Nutrient Uptake.

Improved Calcium Mobilization.