When does ipm use synthetic chemical pesticides?
1. at the first control option
2. only as a last resort
3. when the pest first appears
4. when prevention methods are necessary.

The disease is not caused by a virus but possibly a bacteria and it is directly transmitted

Explanation:

Since the disease can be cured by a bacteria, we can conclude that it is not caused by a virus but possibly a bacteria and is directly transmitted from a reservoir to a susceptible host by physical contact.