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Table 3.

Aphid performance on developmentally pre-tuber-filling and tuber-filling plants

SpeciesPlant age% surviving to adulthoodMedian development time in daysMean fecundity (nymphs adult-1day-1)aRma
Macrosiphum euphorbiae (ADAS 99/11) Pre-tuber-filling 90.0 (40) 9 (34) 1.28 (±0.10) 0.254 (±0.007) 
 Tuber-filling 82.5 (40) 10 (33) 0.70 (±0.11) 0.193 (±0.009) 
  Fisher's exact P>0.05 H1=18.93 P<0.01 t17=3.80 P<0.01 t14=5.43 P<0.01 
Myzus persicae (ADAS 99/12) Pre-tuber-filling 92.2 (77) 8 (72) 0.91 (±0.10) 0.245 (±0.006) 
 Tuber-filling 63.8 (69) 12 (44) 0.41 (±0.04) 0.152 (±0.011) 
  χ21=17.427 P<0.01 H1=75.09 P<0.01 t18=4.92 P<0.01 t17=6.91 P<0.01 
SpeciesPlant age% surviving to adulthoodMedian development time in daysMean fecundity (nymphs adult-1day-1)aRma
Macrosiphum euphorbiae (ADAS 99/11) Pre-tuber-filling 90.0 (40) 9 (34) 1.28 (±0.10) 0.254 (±0.007) 
 Tuber-filling 82.5 (40) 10 (33) 0.70 (±0.11) 0.193 (±0.009) 
  Fisher's exact P>0.05 H1=18.93 P<0.01 t17=3.80 P<0.01 t14=5.43 P<0.01 
Myzus persicae (ADAS 99/12) Pre-tuber-filling 92.2 (77) 8 (72) 0.91 (±0.10) 0.245 (±0.006) 
 Tuber-filling 63.8 (69) 12 (44) 0.41 (±0.04) 0.152 (±0.011) 
  χ21=17.427 P<0.01 H1=75.09 P<0.01 t18=4.92 P<0.01 t17=6.91 P<0.01 
a

Values are the means ± S.E.M., N=7-10 clip-cages.

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