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Table 6 Regression equation of NCTD against 3rd-instar larvae of P. xylostella

From: Formulation and evaluation of norcanthridin nanoemulsions against the Plutella xylostella (Lepidotera: Plutellidae)

Time

Regression equation

R2

χ2

LC50 (mg/L)

(95% confidence limits)

LC90 (mg/L)

(95% confidence limits)

12 h

–

–

–

–

–

24 h

y = 6.379x - 14.881

0.921

0.462

150.090 (114.135~310.777)

312.188 (203.841~10,200.727)

36 h

y = 5.637x - 12.727

0.992

0.156

75.992 (30.489~108.489)

191.903 (130.619~791.051)

48 h

y = 2.630x – 4.684

0.985

0.264

60.414 (23.136~92.727)

185.530 (117.860~693.284)

  1. LC50 = Lethal concentration at which 50% of the larvae showed mortality
  2. LC90 = Lethal concentration at which 90% of the larvae showed mortality
  3. x = log concentration
  4. y = percentage mortality