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Table 2. Fecundity (Mean ± SEM) and proportional survival (Mean ± SEM) of progeny (averaged over eight days of reproduction) of fourth instar aphids that were transferred as conspecific or heterospecific pairs onto TAM 107 wheat plants.
Species combinations
Fecundity (no.)
Proportional survival
 
S. graminum
D. noxia
R. padi
S. graminum
D. noxia
R. padi
Conspecifics
14.00 ± 0.67
11.72 ± 0.71
16.32 ± 1.00
0.88 ± 0.02
0.94 ± 0.01
0.80 ± 0.03
S. graminum and D. noxia
18.67 ± 1.98
9.44 ± 1.16
- -
0.91 ± 0.02
0.79 ± 0.06
- -
S. graminum and R. padi
16.44 ± 1.68
- -
15.00 ± 2.09
0.89 ± 0.03
- -
0.84 ± 0.03
D. noxia and R. padi
- -
11.59 ± 1.30
16.94 ± 2.01
- -
0.83 ± 0.06
0.80 ± 0.06
F (df)
2.28 (2, 51)
1.42 (2, 50)
0.31 (2, 48)
0.55 (2, 51)
2.42 (2, 50)
0.25 (2, 48)
P
0.113
0.250
0.733
0.580
0.099
0.776
Means within columns were not significantly different (P > 0.05, PROC GLM, LS MEANS).
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