Table 5. Two-way repeated-measures ANOVA results for abundance of non-target arthropods with values weights greater than 0.5 and less -0.5 in the Principal Response Curves (PRC) analysis with first axis significant collected by Pitfall traps in non-Bt (with and without insecticides) and Bt (DAS-81419-2) soybean fields at two sites over two to three years in Brazil.
Site (year) | Non-target arthropods | Soybean treatments | Two-way ANOVA | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Non-sprayed non-Bt | Sprayed non-Bt | DAS-81419-2 | Soybean treat. (A) | Sampling time (B) | Interaction (A x B) |
|||||
F | P | F | P | F | P | |||||
Montividiu (2012) |
Canthon sp. | 3.33 ± 0.99 a | 5.75 ± 1.98 a | 0.25 ± 0.18 b | 17.01 | 0.011 | 1.22 | 0.381 | 2.67 | 0.070 |
Elachiptera sp. | 7.42 ± 1.60 a | 7.42 ± 2.86 a | 1.17 ± 0.36 b | 46.87 | 0.002 | 1.97 | 0.220 | 1.13 | 0.400 | |
Labidura xanthopus | 4.25 ± 1.19 | 3.42 ± 1.02 | 1.33 ± 0.39 | 3.99 | 0.112 | 2.10 | 0.202 | 1.82 | 0.177 | |
Euxesta sp. | 3.33 ± 2.10 | 8.92 ± 3.95 | 0.42 ± 0.28 | 6.80 | 0.052 | 5.66 | 0.035 | 5.51 | 0.006 | |
Dorymyrmex brunneus | 4.92 ± 1.92 | 6.42 ± 3.46 | 5.75 ± 2.29 | 0.24 | 0.795 | 8.97 | 0.012 | 2.22 | 0.113 | |
Uberlândia (2011) |
Condylostylus spp. | 2.00 ± 0.63 b | 0.92 ± 0.31 b | 6.08 ± 1.99 a | 19.44 | 0.009 | 5.57 | 0.036 | 9.56 | < 0.001 |
Pheidole sp. | 6.75 ± 1.95 | 6.67 ± 1.50 | 17.00 ± 5.82 | 2.96 | 0.163 | 0.58 | 0.650 | 0.774 | 0.605 | |
Dorymyrmex brunneus | 12.58 ± 3.91 | 6.42 ± 2.03 | 12.08 ± 3.60 | 0.99 | 0.445 | 5.04 | 0.044 | 1.45 | 0.276 | |
Selenophorus sp. | 6.00 ± 1.54 | 26.17 ± 12.40 | 25.17 ± 11.97 | 1.13 | 0.409 | 25.89 | < 0.001 | 2.57 | 0.077 | |
Elachiptera sp. | 8.50 ± 2.55 | 8.00 ± 2.63 | 5.25 ± 2.61 | 0.51 | 0.635 | 8.48 | 0.014 | 0.48 | 0.809 | |
Drosophilidae spp. | 9.83 ± 3.83 | 17.42 ± 8.65 | 5.08 ± 2.05 | 3.71 | 0.123 | 12.83 | 0.005 | 3.77 | 0.024 |
P-values highlighted in bold are statistically significant (α = 0.05).
Degrees of freedom: soybean fields = 2; sampling time = 3; interaction = 6; residual = 12.
Means (± SE) followed by different letters were significantly different within rows (Tukey’s test, α = 0.05).