Top Tweets for #TreeWars

Trees like elms and pines use chemical communication to defend themselves against insects by detecting specific pests through their saliva and releasing pheromones that attract predators like wasps.  They also emit volatile compounds to warn neighboring trees, prompting them to change their leaf chemistry and become less appealing to the pests. Acacias, in turn, release ethylene to signal herbivores' presence and increase tannin levels, making them less palatable.