0.5m FIGURE 9.11 E. engineering techniques. Root-dwelling Pseudomonas FIGURE 9.16 Production of an insect toxin by geneti TEM 025um insulin. I fluorescens bacteria have been genetically engineered to ered to produce indicated by the ar produce the insecticidal toxin normally produced by at promotes an im- indicated by the at Bacillus thuringiensis. The crystal of toxin can be seen in ere as an orange mass, micrograph this cell of P fluorescens, which is capable of producing the toxin in much larger amounts than B. thuringiensis can When root-eating insect larvae ingest the engineered bacteria, they are killed by the toxin. The use of the engineered bacteria is several times more effective than the conventional method of applying B. thuringiensis