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Table 2 LD 50 calculation for the pesticidal activity using probit analysis

From: Pesticidal and pest repellency activities of rhizomes of Drynaria quercifolia (J. Smith) against Tribolium castaneum (Herbst)

Recording time Dose (mg/cm2) % of Average mortality % Corrected mortality Regression equation LD50(mg/cm2) 95% Confidence limits
       Lower Upper
Record after 24 hours 1.77 96.66 97 Esimate 1 0.40 7.99 6.41
0.88 90.00 90 Y = 1.72 + 3.10X
0.44 53.33 53 Esimate 2
0.22 20.00 20 Y = 1.61 + 3.19X
Record after 48 hours 1.77 96.66 97 Esimate 1 0.37 7.33 15.65
0.88 90.00 90 Y = 1.93 + 2.97X
0.44 56.66 57 Esimate 2
  0.22 23.33 23 Y = 1.88 + 3.02X    
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