MARKET UPDATE • ANALYSIS • FARM IMPACT

DIESEL PRICES & FARM IMPACT UPDATE

SATURDAY, JULY 18, 2026   |   SPECIAL REPORT: ENERGY & FARM INPUTS

Diesel Double Shock: Russia’s Export Ban and Hormuz Fallout Slam Farm Country’s Fuel Bill

With harvest bearing down, U.S. diesel is back on the rise at $4.80 a gallon — up 28% from a year ago — as Russia’s July 8 export ban piles onto Strait of Hormuz disruptions, threatening the costliest fall fuel season since 2022

•       Diesel is rising again after a brief reprieve. U.S. on-highway diesel jumped 21.8¢ last week to $4.80/gallon (week ending July 13) — the largest weekly gain since the spring shock — and September diesel futures have surged more than 30% from their late-June lows.
•       The supply problem is structural, not seasonal. Russia (12% of global diesel exports) banned all diesel exports on July 8 after Ukrainian strikes knocked out roughly 30% of its refining capacity, while Persian Gulf refinery throughput remains down about 30% from Strait of Hormuz disruptions. Global diesel loadings are heading for a nine-year July low.
•       Farmers are squarely in the crosshairs. At current prices, fuel for a full-tillage corn program costs about $36 per acre — roughly $14 per acre (65%) above fall 2025 budgets. Across a 1,000-acre operation, that is $14,000 in unplanned cost before a single bushel is hauled.
•       There is no revenue offset. Unlike 2022, corn is trading near $4.00–$4.50 per bushel, not $6–$7. Farm Bureau projects $31 billion in 2026 crop-sector losses even before the latest fuel surge fully lands.

Diesel’s spring run-up began in early March, when the Iran conflict and disruption around the Strait of Hormuz took an estimated 10% of global refining capacity offline and cut Persian Gulf refinery throughput by nearly a third. Retail diesel leapt from $3.90 to $5.64 in five weeks. Prices had been grinding lower through June on ceasefire hopes — until Russia, hit by drone strikes on more than 16 refineries including its largest at Omsk, banned all diesel exports effective July 8. Russia normally exports nearly half of its diesel output and supplies about one-eighth of the world’s diesel trade, so the ban removes a pillar of global supply at the exact moment inventories in gasoline, diesel, and jet fuel all sit below five-year averages.

Chart 1 — EIA weekly U.S. on-highway diesel retail price. Two supply shocks have defined 2026: the March Hormuz disruption and the July 8 Russian export ban.

Table 1. The supply-side scorecard behind the surge

Sources: EIA, industry reports.

Table 2. Diesel price scoreboard — mid-July 2026

Sources: EIA, CoBank.

Regionally, the Corn Belt still enjoys a relative discount — Midwest diesel at $4.66 sits below the $4.80 national average and well under the coasts — but that is cold comfort against a price that is up sharply from a year ago and set to climb further as the futures surge passes through to the pump over coming weeks.

Chart 2 — Regional retail diesel prices, week ending July 13, 2026. The Midwest’s discount to the coasts narrows the blow but doesn’t change the trend.

Diesel is the bloodstream of row-crop agriculture — tillage, planting, spraying, harvest, grain drying, and trucking all run on it. University of Missouri Extension pegs a fuel-intensive corn program (two tillage passes, planting, two spray passes, harvest, and trucking on 180-bushel corn) at about 7.5 gallons of diesel per acre. Every $1.00 move in the diesel price is therefore roughly $7.50 per corn acre, straight off the bottom line.

Chart 3 — Per-acre fuel cost for a full-tillage corn program at four diesel price points (Univ. of Missouri usage estimate).

Table 3. Fuel-cost math for corn — fall 2025 budget vs. current prices

Univ. of Missouri Extension framework; current U.S. retail price.

The pain is compounding through every input that moves by truck or is made with energy. CoBank estimates the post-conflict fuel surge alone adds roughly $2,000 per farmer, with farm diesel and fertilizer prices each up 20–40% since the conflict began — and warns nitrogen prices could double if disruptions persist. In Illinois, farm diesel averaged $5.41 a gallon in early May, nearly twice the year-earlier price.

What makes 2026 different from the 2022 fuel shock is the revenue side. Then, $6–$7 corn absorbed record input bills. Today corn trades near $4.00–$4.50, and the Purdue-CME Ag Economy Barometer shows farmer sentiment falling again on input costs, with roughly two-thirds of surveyed producers expecting lower farm income this year. The American Farm Bureau Federation projects crop-sector losses of $31 billion in 2026, rising to $32 billion in 2027 absent federal assistance — figures compiled before the full force of the July fuel surge. Harvest timing makes it worse: fall is the fuel-intensiveness peak of the farm calendar (combines, grain carts, dryers, and trucking), so every week the diesel market stays tight lands directly on the season when farmers burn the most of it.

•       Duration of Russia’s ban. Officially through end-July, but with ~30% of Russian refining offline and Moscow importing fuel from India, an extension looks likelier than an early lift.
•       Hormuz normalization. Persian Gulf throughput recovery is the fastest route to rebuilding global diesel inventories before Northern Hemisphere harvest and winter heating demand collide.
•       Pass-through to farm diesel. Retail and bulk farm prices lag futures by several weeks; the 30% futures surge since late June has only begun to reach the pump. Locking fall fuel needs on price dips — as producers who booked December–February avoided the spring spike — remains the main defensive tool.
•       Washington. Watch for pressure for emergency farm assistance and the FTC’s new look at fertilizer pricing as input inflation becomes a political issue ahead of harvest.