Table 1 Percent mortality ± s.e.m. of all strains in the selected and unselected (parental and F2) groups and Z-statistics for the F2 generation.

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Straina

Parental

F2

  

Unselectedb

Selected

ZRep 1c

ZRep 2

LA1

82.2 (±0.4)

83.3 (±6.7)

30.0 (±5.0)

7.20*

4.60*

CIN1

83.1 (±0.8)

81.7 (±0.0)

3.4 (±3.4)

7.20*

8.27*

NY1

86.4 (±1.7)

79.2 (±4.2)

36.7 (±8.4)

5.11*

4.38*

  1. *p < 0.001
  2. aMortality of strains was evaluated following the protocol of Gordon et al.22 by exposing groups of bugs to residual deposits of Temprid SC. Individuals from each strain were exposed for strain-specific exposure times (LA1 0.1 h, CIN1 1 h, NY1 19 h) calculated to kill 80 per cent of the population.
  3. bAverage mortality of selection replicates 1 and 2 to strain specific ET80s.
  4. cA test for a significant difference between selected and unselected proportions in the F2 generation for each replicate and strain [Analytical Software. Statistix 8.0 for Windows. Tallahassee, FL (2003)]. N = 60 for each replicate, strain and treatment.
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