A natural and non-toxic way to fight bugs attacking your plants, Dr Bronner's soap is concentrated, biodegradable, versatile and effective. Made with organic and certified fair trade ingredients, packaged in a 100% post-consumer recycled bottle. Add 1/2 tsp to 1l sprayer bottle and apply to affected plants when the sun goes down. The fatty acids contained in the soap are highly effective on soft-bodied insects like aphids, mealybugs, spider mites, thrips and white flies. These fatty acids dissolve or remove the insects cell membranes and their natural protective waxy coatings, causing death from excess water loss.