Bacillus thuringiensis Biotrol BTB 183-25 Nutrilite Products Incorporated, Kansas City, Missouri, USA
Immersing stem seedling in spores suspensions: 1.25 × 108, 6.25 × 107, 2.5 × 107 and 1.25 × 107
Mean mortality on 5-day-old larvae: 32, 31, 25, 15 out of 40. Control mean mortality 0.01 Mean mortality on 10-day-old larvae: 15, 15, 12 and 6 out of 20.