Scorched earth
A scorched-earth policy is a military strategy that aims to destroy anything that might be useful to the enemy while it is advancing through or withdrawing from a location. Any assets that could be used by the enemy may be targeted, for example food sources, water supplies, transportation, communications, industrial resources, and even the locale's people themselves.
Wilmon Newell
His approach to control invasive insects and diseases has been criticized as a "scorched earth" approach, eliminating pests without regard to the environment or to economic losses to growers.