By Ange Aboa and Loucoumane Coulibaly ABIDJAN (Reuters) - Cocoa arrivals at ports in top grower Ivory Coast reached around 1,052,000 tonnes by June 28, exporters estimated on Monday, compared with 1,248,676 tonnes in the same period of the previous season. Exporters estimated around 8,000 tonnes of beans were delivered to the West African state's two ports between June 22 and June 28, down from 20,660 tonnes in the same week a year ago. "We're completely disappointed," said an executive with an exporting firm in Abidjan. "This is one of the worst seasons. With this week's figures, it looks like production (in the mid crop) has already peaked," he said. An extended period of abnormally heavy rain was damaging plants and encouraging the spread of black pod disease, farmers in some key cocoa growing regions said, adding to fears that the April-September phase of the season would not live up to earlier expectations. "Heavy rainfall has knocked lots of young pods from the trees, which is reduce the volume of the mid crop," said Joseph Amani who farms in the eastern region of Abengourou. The 2008/09 season in the world's top grower has been disrupted by disease, bad weather, strikes and administrative reshuffles from its outset in October. Significantly lower arrivals at ports, and worries the harvest would greatly undershoot last year's, contributed to world cocoa prices that outperformed many other commodities late last year and early this year. Since then, benchmark world prices as set in London have fallen, hitting a six-month low last week, and at Monday's price of 1,628 pounds per tonne were down 7 percent from the start of 2009. | 
