Homicide detectives have charged a man with murder in relation to the disappearance of Western Australian father Tony Ditri.

The alleged offender, 64, is in police custody and will face Bunbury court later today.

Mr Ditri, from Pemberton in WA's south-west, was last seen at the local rubbish tip at about 3pm on Friday afternoon.

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His family became concerned when the 40-year-old father-of-three failed to appear at a dinner that night.

Following news of his disappearance, Mr Ditri's truck was found abandoned just off Pemberton-Northcliffe Road that evening.

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A huge search effort was launched with SES, police and community members all involved.

Police are treating Mr Ditri's disappearance as suspicious.