A biological spray already proven in kiwifruit orchards to boost plant health will be useful in tackling the new-found kiwifruit disease PSA (Pseudomonas syringae pv actinidiae).

New Zealand-made Agrizest, a certified organic agricultural compound, strengthens a plant’s defence system and enhances its ability to repair damaged cells.

Horticultural scientist Nathan Balasingham, who invented and markets Agrizest, said the spray helps suppress bacterial diseases, of which PSA is one, by switching on the plant’s own defence mechanism contained in its essential oils or phenylpropanoids.

“Many kiwifruit growers are in shock over the finding of PSA in New Zealand,” Mr Balasingham said. “But they can take measures to protect their crop and livelihoods and Agrizest is one weapon in their armoury.”

Mr Balasingham, a former DSIR scientist with a Master of Horticultural Science with first class honours in biochemistry and more than 30 years in research and development, said Agrizest enhances the plant’s ability to resist pests and reduce disease damage.

“Agrizest will give growers a payback whether they have PSA in their crop or not. The improved fruit quality and quantity will deliver improved returns. All our independent trials show an increase of more than $5000 per hectare.”

Agrizest can be used in conventional and organic orchards (if approved by Biogro).

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