Bt produces endotoxin (that is, parasporal crystals), which paralyzes the intestinal tract and destroys the intima, mainly due to stomach toxicity.
Fungal insecticides invade the body of insects through the body wall, deprive the host of nutrients and secrete toxins and cause the insects’ death.
Bt combined with Beauveria bassiana or Metarhizium anisopliae has a significant synergistic effect on Musca domestica, Helicoverpa armigera and Earias vittella.
It indicated that the stomach toxicity of Bt and the contact killing effect of insecticidal fungi could be synergistic.
lin-chemical.com 