For growers now planting in the Southern hemisphere, the scab decision comes a few weeks after emergence. Irrigation research from the UK and North Dakota shows a short window when moist soil protects young tubers.
Electronic tubers that record every knock on a harvester or grading line give a clear picture of where damage starts. Research from Idaho and Poland shows that drop height and surface type matter most.
Two water-borne tuber rots can destroy a warm, wet harvest within days. Extension guidance from Maine and California sets the same simple harvest limit: tuber pulp below 65°F, or about 18°C.
Potato growers in Michigan report good yields and chip quality. But supplies of chip potatoes are plentiful, and an industry newsletter expects significant cuts in contract volumes for 2027.
Chile shipped 2 million kilograms of potatoes and potato products abroad in the first eight months of 2026. Seed potatoes made up almost half of the volume, while imports stayed about 37 times larger by value.
Cameroon has built a highland potato crop in the West and North-West regions. Output has grown strongly, but official guidance shows farm yields far below what local varieties can deliver, and seed remains the main bottleneck.
Irish potato growers face higher harvesting costs as the lifting season starts. The farmers association says many now doubt the long-term future of production, while supplies in continental Europe are tight.
Rwanda harvests potatoes in three seasons a year, mostly in four northern volcanic districts. Output is rising again, but small farms still harvest far less per hectare than large ones.
The statistics office expects the smallest Czech potato crop in years after drought and heat. Yields fall from over 30 to about 23 tonnes per hectare, and the main growing region loses about a third.
Heat and drought cut the Swiss potato harvest to its lowest level since records began. The industry expects self-sufficiency to fall to 70–75% and has raised grower prices and eased size rules.
The third trial dig of the season in Danish starch potato fields points to a solid crop. Tuber yield is above the ten-year average, but starch content and starch yield are lower than in 2025.
The winter area target of about 205,000 hectares points to large Egyptian supply for Europe and Russia in early 2027. Local G2 seed is sold through cooperatives below the price of imports.