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View Potatoes NZ Priority Pest List.

This project is planned to compare the influence of current seed treatment practices, current products at higher rates, some new fungicide products and a biological product to control seed and soil-borne diseases. Assessments will include impact on disease incidence, yield (tuber and DM) quality and carry over inoculum in the soil.

In 2014 a project compared the influence of current seed treatment practices, current products at higher rates, some new fungicide products and a biological product to control seed and soil-borne diseases. Assessments included impact on disease incidence, yield (tuber and DM) quality and carry over inoculum in the soil.

In 2015, a soil borne disease trial has been established in South Canterbury to evaluate the efficacy of various different fungicides either applied to the seed or in furrow. We are looking at old chemistry and new SDHI chemistry for the control of mostly rhizoctonia and powdery scab. Low disease pressure last season at the two trial sites made it hard to interpret results. A tight potato rotation at the site should result in high disease pressure and some interesting results.