I would be surprised if they were not a separate subsidiary of Dole.
There is usually no reason to have completely unrelated industries (especially when you depend on many companies in said industry to make your primary business function) as part of your main company, especially when, yes, as you stated, the non-related-industry sub-company will usually look for work to optimize its cash flow, ie, to not have idle assets that could be making money instead.
An example we're more use to: Amazon's AWS is a separate company that works for competitors to Amazon's other services (Netflix vs Prime Video, one of the Spotify customers (can't remember which) vs Prime Music, etc.
There is usually no reason to have completely unrelated industries (especially when you depend on many companies in said industry to make your primary business function) as part of your main company, especially when, yes, as you stated, the non-related-industry sub-company will usually look for work to optimize its cash flow, ie, to not have idle assets that could be making money instead.
An example we're more use to: Amazon's AWS is a separate company that works for competitors to Amazon's other services (Netflix vs Prime Video, one of the Spotify customers (can't remember which) vs Prime Music, etc.