Table 3 The LC50 values of M. incognita measured for three organophosphates.

From: Mutations in Acetylcholinesterase2 (ace2) increase the insensitivity of acetylcholinesterase to fosthiazate in the root-knot nematode Meloidogyne incognita

Organophosphates

Nematode populations

LC50a (μg ml−1)

95% CLb

Slope ( ± SE)

RRc

Fosthiazate

RP

152.18

98.12–217.56

1.98 ± 0.34

2.74

SP

55.54

38.20–86.57

1.06 ± 0.38

—

Fenamiphos

RP

13.51

8.39–20.58

2.73 ± 0.44

1.08

SP

12.48

7.41–19.62

2.75 ± 0.39

—

Phonamiphos

RP

43.29

31.12–64.35

3.07 ± 0.31

1.05

SP

41.26

29.58–61.46

3.12 ± 0.43

—

  1. aConcentrations of nematicides causing 50% mortality at 72 h post-treatment.
  2. bConfidence limit.
  3. cRR (resistance ratio) = LC50 (the resistant population) ÷ LC50 (the susceptible population).
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