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Table 1 Effects of Bacillus thuringiensis var. thuringiensis against Syllepte derogata larvae under laboratory conditions

From: Biological characteristics and efficacy of Bacillus thuringiensis var. thuringiensis against the cotton leaf roller, Syllepte derogata (Fabricius, 1775) (Lepidoptera: Crambidae)

Btt concentration (g/l) Mortality of 2nd instar (%) T test Mortality of 4th instar (%) T test
3rd day 7th day 3rd day 7th day
0.3 g/l 40.00 B*a** 50.00 Ca t = 1.22 13.33 ABa 16.66 BCa t = 0.71
P = 0.28 P = 0.52
0.4 g/l 56.67 Ba 66.67 Ba t = 2.12 23.33 Aa 30.00 ABa t = 1.00
P = 0.10 P = 0.39
0.5 g/l 93.33 Aa 100.00 Aa t = 2.00 30.00 Aa 36.66 Aa t = 1.00
P = 0.18 P = 0.39
Control 0.00 C 0.00 D   0.00 B 0.00 C  
ANOVA F = 107.9333 F = 156.2500   F = 12.2667 F = 18.8667  
P = 0.0001 P = 0.0001 P = 0.0023 P = 0.0005
  1. *There is no significant difference (99% probability level) between the same capital letters shown in the same column in terms of Btt concentrations (P = 0.01)
  2. **There is no significant difference (99% probability level) between the same lowercase letters shown in the same line in terms of the effect of the same concentration on the same larval period (P = 0.01)