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Table 1 Means and standard deviations of chlorpyrifos residue levels (mg kg-1) in the treated and control lettuce samples at different stages of growth, n = 6

From: Effects of per-household processes on the levels of chlorpyrifos residues in lettuce (Lactuca sativa)

  Stage 1 Stage 2 Stage 3
Treatments Sample 1A Sample 2A Sample 3A Sample 1B Sample 2B Sample 3B Sample 1C Sample 2C Sample 3C
Control/Treatment 1 0.059 ± 0.008 0.052 ± 0.001 0.006 ± 0.002 0.055 ± 0.0014 0.053 ± 0.012 0.007 ± 0.002 0.055 ± 0.009 0.034 ± 0.003 0.002 ± 0.001
Treatment 2 0.049 ± 0.009 0.048 ± 0.004 0.006 ± 0.001 0.052 ± 0.004 0.046 ± 0.007 0.005 ± 0.0028 0.053 ± 0.0023 0.03 ± 0.006 0.002 ± 0.0014
Treatment 3 0.039 ± 0.006 0.023 ± 0.004 0.004 ± 0.001 0.041 ± 0.008 0.035 ± 0.004 0.004 ± 0.0014 0.043 ± 0.0014 0.025 ± 0.004 0.002 ± 0.0004
Treatment 4 0.018 ± 0.006 0.01 ± 0.004 0.003 ± 0.001 0.028 ± 0.009 0.027 ± 0.004 0.004 ± 0.002 0.027 ± 0.003 0.019 ± 0.008 0.001 ± 0.001