Chemical modification of Bacillus thuringiensis activated delta-endotoxin and its effect on toxicity and binding to Manduca sexta midgut membranes

arginina arginine bacillus thuringiensis bacterial pesticides cell culture cell lines choristoneura fumiferana culture de cellule entomopathogenic bacteria hosts manduca sexta pathogens pieris brassicae plaguicidas bacterianos toxinas toxine toxins triptofano tryptophan tryptophane