Table 4.
Spearman correlation coefficients (ρ) between the number of predators and parasitoids found in the WAA colonies and the number of arthropods found in visual observations (VO) and beating tray samplings (BTS) in the flower margin (FM) and control margin (CM).
| Type of Sampling | Arthropod Group | Predators in the WAA Colonies | Parasitoids in the WAA Colonies | |||
|---|---|---|---|---|---|---|
| ρ | p | ρ | p | |||
| FM | VO | Syrphidae | 0.298 | 0.078 | 0.181 | 0.292 |
| BST | Predators | 0.139 | 0.419 | 0.055 | 0.752 | |
| Parasitoids | 0.295 | 0.081 | 0.223 | 0.190 | ||
| Phytophagous insects | 0.022 | 0.898 | 0.079 | 0.647 | ||
| CM | VO | Syrphidae | 0.107 | 0.536 | −0.141 | 0.413 |
| BTS | Predators | 0.031 | 0.857 | −0.156 | 0.363 | |
| Parasitoids | 0.093 | 0.588 | −0.101 | 0.557 | ||
| Phytophagous insects | 0.154 | 0.369 | −0.026 | 0.881 | ||
| WAA | WAA colonies | % shoots infested with WAA colonies | 0.227 | 0.183 | 0.597 | <0.001 |
| Predators | − | − | 0.253 | 0.136 | ||
| Parasitoids | 0.253 | 0.136 | − | − | ||
* Test statistics (Spearman correlation coefficients (ρ) and likelihood ratio (p)) are shown. Significant p values (p <0.05) are shown in bold.