The next time you move, remember not to pack gypsy moths. these pests can kill more than three hundred different species of trees. That’s why the department of agriculture requires you to get an official certificate of inspection showing you’re moth free. You can hire a state-certified pesticide applicator or do your own check of lawn furniture, grills and outdoor toys for egg masses. Use a putty knife or stiff brush to scrape them into a container of hot, soapy water. Give the moving van driver the certificate. Learn more at moving.org.