Table 2. Total counts of natural enemies (per 100 plants) observed in the open cotton field surveys during the growing season of 2011, 2012 and 2013 at Langfang experimental station (Yellow River Region of China).
| Natural enemies | Total counts | Percentage within group (%) | ||||
|---|---|---|---|---|---|---|
| 2011 | 2012 | 2013 | 2011 | 2012 | 2013 | |
| Coccinellidsa | 5780 | 4713 | 4473 | 34.08† | 20.82 | 26.05 |
| Chrysopidsb | 1767 | 1267 | 513 | 10.42 | 5.60 | 2.99 |
| Anthocoridsc | 2760 | 4267 | 2653 | 16.27 | 18.85 | 15.45 |
| Araneae (Spiders)d | 2813 | 5587 | 5907 | 16.59 | 24.68 | 34.40† |
| Aphid parasitoidse | 3840 | 6800 | 3627 | 22.64 | 30.04† | 21.12 |
†Dominant group of natural enemies counted in respective season.
amainly Coccinella septempunctata L., Harmonia axyridis P., Propylaea japonica T. and Adonia variegata G.
bmainly Chrysopa septempunctata W., Chrysoperla sinica T. and Chrysopa formosa B.
cmainly Orius similis Z.
dmainly Erigonidium graminicolum S. (Linyphiidae), and Hunting spiders, Misumenopos tricuspidata F. (Thomisidae) and Pardosa t-insignita Boes. et Str. (Lycosidae).
emainly Trioxys spp. H. and Aphidius gifuensis A.