The disruption of wheat shipments from Russia and Ukraine is exposing how quickly a conflict in one of the world’s main agricultural corridors can move through ports, railways, bakeries, livestock markets and household budgets. Combined Russian and Ukrainian wheat exports are estimated to fall to roughly half their level for the July-to-September harvesting period last year, according to figures cited from researcher Sov Econ in an Economic Times report based on Bloomberg reporting.
The immediate problem is not simply that grain is being delayed. The larger issue is that the global food system has been built around a small number of highly productive regions and efficient maritime routes. When those routes are attacked, alternative supplies exist, but they are more expensive, slower, less developed or unable to handle comparable volumes. That makes the Black Sea disruption a logistics crisis as much as an agricultural one.
Russia and Ukraine together account for more than a quarter of global wheat trade, a share that the report compares with the importance of the Strait of Hormuz to seaborne oil shipments. The two countries also represent about two-thirds of global sunflower oil trade and a tenth of corn shipping. Their agricultural exports reach markets across Egypt, the Middle East, Turkey, South Asia and Southeast Asia, eventually entering products ranging from subsidised bread to animal feed and flour.
The crisis intensified after attacks on ports, grain terminals, silos and vessels restricted shipments from July. Russia’s exports have been affected by Ukrainian drone attacks, while Ukraine has struggled to move grain after its Black Sea ports were blocked or repeatedly attacked. The result is a supply chain forced to search for alternatives just as several other breadbaskets are facing their own constraints.
The experience of Tue Vuong, chief executive of Golden Wheat in Ho Chi Minh City, shows how the disruption is experienced by a buyer far from the conflict zone. His company had secured four cargoes of Black Sea wheat, representing roughly a fifth of its annual requirement, before being told that the shipments would not move. Two cargoes were replaced with Bulgarian wheat, while the company turned to the United States for additional supplies at a higher price.
The company also had to monitor insurance terms, vessel movements and the risk of disruption beyond the Black Sea. Even after securing alternative cargoes, shipments had to pass through other exposed routes, including the Red Sea and the Gulf of Aden. This is the new operating environment for grain buyers: a purchase contract is no longer only a question of price and quality, but also of whether a vessel, driver, railway wagon or port can complete the journey.
The geography of the alternatives explains why replacing Black Sea grain is difficult. Bulgaria’s Burgas port has helped absorb some demand, while buyers have approached France, Romania, Argentina, Australia and the Baltic states. Bangladesh is seeking supplies from Romania and Argentina and has also secured small quantities from India after India scrapped a years-long export ban. Turkey, the United Arab Emirates and other buyers have turned to Lithuania, Latvia and Estonia.
But a different port does not automatically mean an equivalent supply chain. Wheat is traded on thin margins, and transport costs can determine whether a cargo remains commercially viable. Russia is trying to move grain through Kazakhstan, the Baltic and Caspian seas, as well as from its Far Eastern ports. These routes add rail distance, handling costs and congestion. Russia plans to pause export duties and subsidise rail transport, but the report notes that more than 70% of Russian grain exports still depend on the Black Sea.
Ukraine faces an even more severe infrastructure problem. Ports around Odesa normally handled about 90% of the country’s grain exports. Agricultural shipments generate more than half of Ukraine’s export revenue, making the disruption a threat not only to international food buyers but also to the country’s fiscal position and farm economy.
As the new harvest accumulates, Ukraine is running short of storage. Grain storage capacity could be full by early November, according to the report, forcing some farmers to use plastic silo bags. Lower farm-gate prices and blocked export routes create a damaging combination: farmers have produce but limited space to store it, while overseas buyers face shortages and higher prices.
The Danube and Romania’s Constanta port have become important alternatives, but they are also constrained. Low water levels on the Danube have complicated shipments, while coastal routes through Romania and Bulgaria are becoming congested. Ship-tracking data compiled by Kpler and Bloomberg showed a backlog of roughly 80 vessels around Ukraine’s Danube ports. Road and rail routes offer additional capacity, but not enough to replace deep-sea terminals.
Some 180 grain wagons can currently cross Ukraine’s borders each day, equivalent to about 10,000 tonnes of grain, according to Nikolay Gorbachov of the Ukrainian Grain Association. That volume is small compared with the quantities that moved through Odesa. The constraint demonstrates a basic infrastructure lesson: emergency routes can keep a system functioning, but they cannot instantly reproduce the scale, speed and cost of a mature maritime export network.
The disruption is also colliding with politics. Ukraine’s western neighbours have imposed import restrictions after protests by local farmers. The report describes continuing sensitivity in Poland, where the movement of Ukrainian grain has become a political issue. Even when European governments support transit to help Ukraine export, domestic agricultural interests can limit how much grain is allowed to cross or enter local markets.
This creates a difficult governance problem for importing and transit countries. They must balance food affordability, farmer protection, trade obligations and support for Ukraine. A route that is technically available may still be politically restricted. A shipment that can cross a border may face delays, driver shortages, insurance complications or local opposition before reaching a mill.
The consequences are most visible in countries where wheat is central to urban food systems and government subsidy programmes. Egypt, the world’s biggest wheat buyer, has received no Black Sea grain for about a month, according to the report. Russia and Ukraine account for roughly half of Egypt’s wheat imports, while about two-thirds of households are entitled to subsidised bread. The government’s stockpiles are reported to be sufficient for subsidised bread consumption until February, helped by a good domestic harvest, but flour prices have already risen.
Egypt’s bakeries illustrate how an international logistics shock reaches city streets. Bakers are facing higher flour, energy and labour costs while remaining under pressure to keep unsubsidised bread prices stable. For households already experiencing cost-of-living pressure, a supply disruption can therefore be absorbed in several ways: through higher prices, lower margins for businesses, reduced product quality or increased pressure on public subsidies.
The same chain operates differently in Southeast Asia. Golden Wheat mills grain for flour and imports feed for animals, serving a growing food and aquaculture sector around Ho Chi Minh City. A disruption in wheat supply can therefore affect more than bread. It can raise costs for livestock and aquaculture producers, with potential effects on food prices across urban markets. The report does not establish a specific price impact in Indian cities, but India appears in the wider adjustment as a source of small wheat shipments for Bangladesh and as a market connected to the global search for replacement grain.
The supply shock is arriving alongside other pressures. Drought has reduced wheat and corn yields in the United States, heat waves have affected crops in Europe, and fuel and fertiliser costs have already risen. The report also cites a powerful El Niño as an additional challenge. Diesel is a particularly important input because it affects farming, trucking, rail movement and port operations. Higher fuel costs can therefore amplify a grain shortage even where physical supplies remain available.
The policy response is split between emergency logistics and diplomatic repair. Russia is subsidising alternative rail routes and considering export-duty measures. Ukraine is seeking to expand shipments through Romania and neighbouring countries. Turkey is working towards a new agreement resembling the 2022 Black Sea Grain Initiative, which it helped broker for Ukrainian grain. Egypt has called for efforts to stabilise supply, while the European Union has supported alternative transit routes but acknowledged that land corridors cannot substitute for the volumes moved by sea.
The earlier grain initiative is important because it showed that diplomatic arrangements can temporarily restore movement through a conflict-affected corridor. However, the present disruption involves repeated attacks on ports and vessels, damaged infrastructure, congestion in alternative routes and weaker political support in some neighbouring countries. Even if an agreement is reached, restoring export capacity would not be immediate. Port infrastructure, storage facilities and shipping networks may require months or years to repair.
The longer-term risk extends beyond the current harvest. Farmers in Russia and Ukraine are already planting wheat for next year, and early indications cited in the report suggest that sowing may be reduced. That could affect grain supplies in 2027. Markets have recently responded to hopes of a peaceful resolution, pushing wheat prices lower, but Bloomberg Intelligence analysts warned that the risks may be underpriced.
The Black Sea crisis therefore exposes a structural weakness in the global food system: production may be geographically diverse, but export infrastructure is concentrated. A country can have grain available in a field and still be unable to deliver it to an urban consumer if ports, storage, roads, railways, insurance or border crossings fail. The resilience of food supply depends on the entire chain, not only on harvest volumes.
For cities, the central question is how much disruption households and public systems can absorb before food security becomes an urban governance problem. The evidence in the report points to pressure on bakeries, livestock producers, subsidised bread programmes, import agencies and transport networks. It also shows that alternative routes can reduce the shock without eliminating it. What remains uncertain is the duration of the blockade, the scale of infrastructure damage and whether diplomacy can reopen a reliable maritime corridor before reserves and replacement supplies become more constrained.
