Chile's increased walnut production and a good harvest in China have led to a 17% rise in the global walnut harvest this year, according to Jonathan Rhodes, director of Perlim Noix. However, the market faces challenges due to declining purchasing power, resulting in a 15% drop in sales of dried fruit and nuts while global production has increased. The economic climate, particularly in Europe, is putting pressure on walnut sales as they are not considered essential food items.