Table 1. Total number of aphids and their natural enemies found in yellow traps in different crop systems during 2011 growing season.
| Species | Treatments |
||||
|---|---|---|---|---|---|
| Paraffin oil | (E)-β-Farnesene | Garlic extract | (Z)-3-Hexenol | % of Totala | |
| Aphids | |||||
| Metopolophum dirhodum (Walker) | 896 | 585 | 582 | 1122 | 89.5 |
| Sitobion avenae (Fabricius) | 138 | 35 | 54 | 148 | 10.5 |
| Diversity and abundance of aphid species % | 29.0 | 17.4 | 17.9 | 35.7 | |
| Ladybirds | 12.8%b | ||||
| Harmonia axyridis Pallas | 18 | 21 | 22 | 28 | 66.8 |
| Coccinella septempunctata L. | 9 | 9 | 8 | 3 | 21.8 |
| Propylea 14-punctata L. | 3 | 3 | 1 | 0 | 5.3 |
| Harmonia 4-punctata | 2 | 1 | 0 | 0 | 2.3 |
| Calvia 14-guttata | 2 | 0 | 0 | 0 | 1.5 |
| Hippodamia variegata (Goeze) | 1 | 1 | 0 | 1 | 2.3 |
| Hoverflies | 39.4%b | ||||
| Episyrphus balteatus De Geer | 69 | 108 | 85 | 76 | 82.6 |
| Scaeva pyrastri L. | 2 | 0 | 0 | 7 | 2.2 |
| Sphaerophoria scripta L. | 12 | 16 | 9 | 8 | 11.0 |
| Melanostoma scalare Fabr. | 0 | 3 | 0 | 1 | 1.0 |
| Metasyrphus corollae Fabr. | 5 | 1 | 2 | 5 | 3.2 |
| Lacewings | 47.8%b | ||||
| Chrysoperla carnea Stephens | 95 | 128 | 152 | 121 | 100.0 |
| Total numbers of aphidophagous species | 218 | 291 | 279 | 250 | |
| Percentage of total number of aphidophagous species | 21.0 | 28.0 | 26.9 | 24.1 | |
aRelative abundance of each species by family.
bRelative occurrence of each family in aphidophagous guild.