Table 1. Soybean aphid and soybean cyst nematode population densities and brown stem rot severity in 2008 and 2009 growing seasons.
| Mean SBA population density a (±SE) | SCN population density b (±SE) | BSR severity c (±SE) | |||||
|---|---|---|---|---|---|---|---|
| SBA:SCN:BSR | SBA: unlimited | SBA:250 d | SBA:SCN:BSR | SCN | SBA:SCN:BSR | BSR | |
| 2008 | 2884±288 | 3983±741 | 553±98 | 1150±414 | 717±395 | 2.76±0.58 | 3.35±1.70 |
| 2009 | 3806.2±953 | 8217±1861 | 330±43 | 1570±857 | 2560±1091 | 2.10±0.32 | 2.30±0.44 |
aNumber of SBA per plant at R3-R4 when leaf tissue samples were taken.
bEggs per 100 cm3 soil at the end of the growing season.
cNumber of nodes in stem displaying characteristic discoloration of brown stem rot disease.
dNumber of SBA per plant when insecticides were applied. The target population was 250 aphids per plants, and was reached before the R3-R4 stage. Plants assigned this treatment were kept free of aphids throughout the rest of the experiment with additional insecticide applications as needed.