*

Front and back-month corn contracts hit contract lows

*

Wheat tips down on harvest pressure

*

Soybeans edge lower on selling pressure

(Updates prices for market close)

By Heather Schlitz

CHICAGO, June 25 (Reuters) - Chicago Board of Trade

front and back-month corn futures notched lifetime lows on

Wednesday on expectations of a hefty Brazilian corn crop and a

lack of weather threats for the large U.S. corn crop that has

recently been seeded, traders said.

CBOT corn, soybean and wheat futures also felt selling

pressure ahead of the first notice day for the July contracts

and the U.S. Department of Agriculture's closely-watched crop

progress and quarterly stocks reports on Monday.

"Everything is in a free fall right now," Tom Fritz, broker

at EFG Group, said.

CBOT September corn settled 7-1/4 cents lower to

$4.05 per bushel. It earlier fell to its lowest point on a

continuous chart since October 2024, at $4.08 a bushel, marking

the latest in a series of lows for corn this month.

CBOT August soybeans ended 20-3/4 cents lower at

$10.29-1/2 a bushel, falling for a fourth session. CBOT

September wheat settled down 7-1/2 cents at $5.44-1/2 per

bushel, dropping for the third day in a row.

Warm, rainy weather in the U.S. Midwest is expected to aid

crop development for the nascent corn and soy crops in the

coming days, creating a greenhouse-like effect.

"When you buy a plant out of a greenhouse it's green and

healthy. That's what's happening in the Midwest," Fritz said.

Expectations of ample global supply for corn and wheat

have also added heavy pressure to prices.

In Brazil, farmers are estimated to produce a record 123.3

million metric tons of their second corn crop, agribusiness

consultancy Agroconsult said on Tuesday.

Wheat remained curbed by a strong production outlook across

the Northern Hemisphere where harvesting is under way.

Consultancy Sovecon said on Wednesday it had slightly raised

its forecast for 2025 Russian wheat production, citing improved

crop conditions in parts of central Russia, as it joined other

analysts in raising its outlook for the crop.