Figure 2.

Mean percentage survival rates for coconut rhinoceros beetle first- and second-instar larvae after 1 week’s exposure to mulch saturated with solutions containing various concentrations of NaCl (A), KCl (B), CaCl₂ (C), MgCl₂ (D), or Epsom salt (E). Mean values represent three replicates of the survival of five larvae in each condition. Treatment concentrations within the salt type and larvae stage not sharing the same letter are significantly different (NaCl: first instars, F_4,8 = 16.857, p < 0.001; second instars, F_5,10 = 15.518, p < 0.001; KCl: first instars, F_4,8 = 5.041, p < 0.05; second instars F_{5 ,10} = 17.056, p < 0.001; CaCl₂: first instars, F_3,6 = 12.182, p < 0.01; second instars, F_4,8 = 11.15, p < 0.01; MgCl₂: first instars, F_4,8 = 14.5, p < 0.001; second instars, F_5,8 = 10.667, p < 0.001; Epsom salt: first instars, F_3,6 = 6.588, p < 0.05; second instars, F_3,6 = 11.957, p < 0.01).