CHICAGO, June 28 (Reuters) - U.S. corn futures fell more than 4% and soybeans more than 2% on Wednesday, pressured by forecasts for crop-boosting rains in the Midwest where dry conditions have stressed crops in many areas.
Wheat also declined, pressured by the expanding U.S. winter wheat harvest and a larger-than-expected Canadian acreage estimate.
As of 1:10 p.m. CDT
(1810 GMT)
, most-active December corn futures on the Chicago Board of Trade were down 23-1/2 cents at $5.37-1/2 per bushel after touching $5.34, the contract's lowest since June 9.
CBOT November soybeans were down 31-3/4 cents at $12.62-1/2 a bushel, and September wheat was down 29 cents at $6.70 a bushel.
Fluctuating weather forecasts for the U.S. Corn Belt have kept traders on edge for weeks. Dry conditions stressed crops and sent futures soaring to multi-month highs by mid-June, but outlooks for rain later this week and into next week bolstered production prospects and triggered a sell-off.
"The bears are expecting better Midwest rains this week to slow plummeting crop ratings, and a more beneficial pattern to finally develop into the critical month of July," Matt Zeller, director of market information at brokerage StoneX, said in a note to clients.
The rain prospects have tempered worries about U.S. government data on Monday showing the worst corn and soybean crop conditions in decades.
"It seems that funds have begun to exit their recently established long positions in corn and soybeans on increased chances of improved soil moisture in the U.S. Midwest," brokerage Copenhagen Merchants said in a note.
Brokers are also squaring positions ahead of key
U.S. acreage and quarterly stocks reports
due Friday from the U.S. Department of Agriculture.
Wheat futures sagged as the market shifted its focus back to ample supplies, after jitters caused by last weekend's aborted mutiny by the Wagner militia in Russia, the world's top exporter.
In Canada, farmers seeded 26.9 million acres to wheat for 2023, a government report showed on Wednesday, the most in 22 years. The figure was above an average of industry expectations for 26.5 million. Canadian growers also planted more canola than the industry was forecasting.
Meanwhile,
Ukraine's 2023 wheat harvest
may reach at least 24 million metric tons this year, far exceeding official expectations and bouncing back close to pre-war levels, Ukraine's grain traders body said. (Reporting by Julie Ingwersen; additional reporting by Gus Trompiz in Paris and Naveen Thukral in Singapore; editing by Rashmi Aich, Subhranshu Sahu, Barbara Lewis and David Gregorio)
