The group will also miss its two appearances at the April 11-12 Wanee Festival in Live Oak, FL, which the group has hosted since 2005. The festival will continue without the Allmans, with a lineup featuring Gov't Mule, Bob Weir & Ratdog, Derek Trucks and others.

The moves were made to give founding member and lead vocalist Gregg Allman more time to recover from the side effects of his recent treatments for the Hepatitis C virus, according to a release.

"I'm getting better but I'm still tired," said Allman in a press statement. "I need to be at 110% to do the shows the way we do them. I can't tell you how much I appreciate the support and understanding my Brothers and our fans have given me."

The band will return in June for a slot at Manchester, TN's Bonnaroo Festival, and then hit the road for a 12-date tour in August. The first two dates of the August outing have been announced, with shows in Mansfield, MA (8/16) and Camden, NJ (8/23).

The Allman Brothers Band released its self-titled debut in 1969, achieving breakthrough success with the 1971 live document "At Fillmore East" and its part-live follow-up, 1972's "Eat a Peach," which was completed in the wake of the tragic death-via-motorcycle-accident of the band's original lead guitarist, Duane Allman.

The group's most recent full-length release was 2003's "Hittin' the Note," which marked the first new studio material from the band in nine years.