The host of aggressive foreign noxious weeds gradually dominating our wild lands is fully capable of devastating both native and desirable agricultural plant communities. This infection can be compared to foreign strains of flu, Lyme Disease or West Nile Virus, but unlike our bodies, native plant systems don't have enough time to develop an immunity to fight the onslaught. Human mobility is the source of the infection; it is therefore up to us to isolate and fight the disease.
As with human disease, weed treatments come in a variety of prescriptions that have a range of applications and effectiveness. Examples would be hand pulling of weeds (surgery), planting competing vegetation (increasing immunity), introducing weed eating insects (inoculation) and spraying with herbicides (drugs). Like a doctor prescribing antibiotics and bed-rest for us, using a combination of the weed control options is usually the most effective measure against a weed infection.
Comparison of herbicides to human drugs isn't as much of a stretch as it might seem. Both fit under the general definition of pesticides. As with antibiotics, herbicides aren’t always the best prescription, and can have very serious side effects if used improperly.
However, they are often necessary with the most resilient and virulent weeds.
Everything humans do has some risk of undesirable side-effects, especially when tackling serious problems. However, if we don’t use all the remedies at our disposal, the risks are very high that a lot of our wildlife, recreation areas, and family farms and ranches will be seriously, if not terminally ill. Herbicide use can be controversial. However, just as with antibiotics, they are effective and safe when used appropriately.