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Table 2 Effects of Bacillus thuringiensis var. thuringiensis against Syllepte derogata larvae under field 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 rate (%)
3rd day 7th day
0.5 g/l 57.41 72.88
Control 0.00 0.00
Ttest t = − 7.57238 t = − 18.3358
P = 0.0066* P = 0.0004*
  1. *According to the independent t test, there is a significant difference between treatment and control on both 3th and 7th days (p ˂ 0.01).