Summary statistics for host trees and insects sampled.

Total raw mean densities ± SE are shown for each taxon. Tree densities are per site, fly densities are in larvae per fruit, cherry wasp densities are adults per fly larvae, and walnut wasp densities are adults per fly pupae. Total sites sampled includes all surveyed sites for trees (excluding one aquatic site), and for flies and wasps includes all sites where fruit and fly hosts were present respectively. Total collected for trees represents total fruits collected. Corresponding numbers for walnut flies show larvae from fruits/pupae from soil. NA indicates plot subsets not sampled.