The Cambridge Dictionary defines the familiar idiom, “a shot in the arm” as “something that has a sudden, strong, positive effect on something.” It apparently came into popular language as early as ...

Injecting trees with an insecticide is proving to be more popular than the original plan to cut down not just trees infested with Asian longhorned beetles, but even the pest’s nearby favorite food ...

1. Chlorotic orange trees have been improved temporarily by the injection of iron-salt solutions into the trees. Subsequent injections are necessary in order to maintain the trees in a healthy ...