Del Monte Pacific, which is listed in Singapore and the Philippines, said the writedowns would not impact cash flow.
The second quarter results are due to be announced on Dec 11.
The group's core earnings in the quarter ended October are expected to be positive and higher than they were a year ago, it said.
Del Monte also said it is evaluating options to refinance existing loan facilities of about US$1.4 billion ($1.9 billion) held by the US subsidiary. The facilities include a US$442.5 million loan facility maturing next November.
As at 3.29pm, shares in Del Monte are down 0.4 cent at 14 cents.