Grain prices in Ireland have risen by approximately €20/t year-on-year, yet Teagasc's first analysis of harvest 2026 puts poor yields — not market returns — at the top of the list of reasons so many tillage farmers are facing razor-thin margins.

The state advisory body's initial figures point to variable performance across all crops as the single biggest contributor to the economic pressure now bearing down on the sector. Rising input costs compound the problem. Fertiliser, fuel and labour have all pushed bills significantly higher over the past 12 months.

Teagasc tillage specialist Shay Phelan has seen the damage firsthand. "Yields were very variable across all crops. And the impact of the drought made all the difference," he said.

"I walked crops of spring barley prior to harvest that yielded moderately well. Other crops, on the other hand, did not perform well at all. But, across the board, there is evidence that winter barley crops were badly impacted by the drought."

The uneven performance matters because, as Phelan put it bluntly: "Harvest 2026 has shown that final yield is a key driver of crop margins." A €20/t improvement in price cannot compensate when the tonnage underneath it shrinks.

Oilseed rape: the two-year success story

Amid the disappointment, winter oilseed rape stands out. Phelan describes it as the success story of Irish tillage for the past two years, though not primarily for agronomic reasons.

"Yields were moderate. But it is the strong price of oilseed rape that is driving the success of the crop at the present time," he explained.

That performance raises an obvious question: will the oilseed rape area expand further for 2026/2027? Phelan urges caution.

"That may not be the case," he stressed. "Rotation restrictions may limit additional planting opportunities for rape in certain parts of the country."

For growers weighing a swing into rape on the back of strong prices, the message is to check rotation constraints before committing ground.

Winter cereal planting accelerates

Planting of winter cereals is continuing apace, particularly on larger tillage farms. Phelan expects the pace to hold.

"Growers with moderate acreages of barley and wheat to plant will be in the fields over the coming days," he said. "But early planting of winter cereals comes with both risks and additional costs."

The biggest threat is Barley Yellow Dwarf Virus (BYDV). Phelan warned the risk remains high right now — and growers need no reminder of the stakes.

"We saw just how badly that disease can impact all cereal crops back in the spring," he said.

Two management tools exist. Growers can choose winter barley varieties with disease tolerance, or use an insecticide to tackle the aphid populations that spread the virus. Neither is a complete answer.

"But, even combined, neither approach can offer full insurance cover, where Barley Yellow Dwarf Virus is concerned," said Phelan.

Early drilling carries further penalties. Grass weed populations are "harder to control" in early sown winter cereals, Phelan noted, and there is a greater risk of lodging later in the season. Every one of those factors adds cost for the grower.

What it means for margins

The arithmetic from harvest 2026 is unforgiving. Price gains of roughly €20/t have been swallowed by drought-reduced yields, above all in winter barley, while fertiliser, fuel and labour costs have climbed over the same period. The result is the tight margin position now recorded across much of the tillage sector.

For the current planting campaign, the decisions are concrete: weigh BYDV-tolerant varieties against insecticide programmes, factor in the added grass weed and lodging risks of early drilling, and treat rotation limits on oilseed rape as a genuine constraint rather than a detail.

Farmers should watch the next round of Teagasc margin analysis for a full breakdown of crop-by-crop performance, and monitor BYDV risk indicators as drilling of winter barley and wheat continues over the coming days.