"Caterpillar Saliva Beats Plant Defenses." Nature. "Killer Caterpillars: Built to Eat Flesh." National Geographic. "Caterpillars of the Pacific Northwest Forests and Woodlands." USGS. "An Epidemic Airborne Disease Caused by the Oak Processionary Caterpillar." Pediatric Dermatology. "Pros and Cons of Group Living in the Forest Tent Caterpillar: Separating the Roles of Silk and Grouping." Entomologia Experimentalis et Applicata. "Biology and Control of Tent Caterpillars." Washington State University. "Retention of Memory through Metamorphosis: Can a Moth Remember what it Learned as a Caterpillar?" PLoS One. "Stinging Caterpillars." University of Kentucky College of Agriculture. Department of Agriculture Forest Service. To learn more about caterpillars, butterflies and other insects, read through the links below. Damage from hungry caterpillars, even gregarious species, is usually temporary - and a yard full of butterflies can be the reward for tolerating it. If you see caterpillars in your yard, keep in mind that only a few species are true pests. Consult your local agricultural extension office or a licensed exterminator to find out which chemicals are recommended and legal in your area. Preparations of the bacterium Bacillus thuringiensis (Bt) will usually control caterpillars, but its effect can be widespread, wiping out beneficial caterpillars as well as pests. Often, they're not particularly effective against hungry larvae, although they may kill the adults who are preparing to lay the next generation of eggs. See a doctor if irritation persists or if you show symptoms of an allergic reaction. If you find that caterpillars' spines have become embedded in your skin, try pulling them out with tape. If you want to remove tents or nests from your plants, wear gloves - the caterpillars' hairs can be irritating or cause allergic reactions.If you see a ring of eggs encircling a tree branch, remove and destroy it before caterpillars hatch. Focus on prevention rather than control.If you exterminate all the wasps in your area, you may inadvertently cause caterpillars to thrive. Parasitic wasps will lay their eggs on or in caterpillars, and when these eggs hatch, the larvae will use the caterpillar's body as food. Keep in mind that wasps often prey on caterpillars and keep their population in control.The risk of fire overshadows the immediate extermination of the nest. In spite if what you may have heard, attempting to burn tents from the trees is not a good idea, particularly in dry conditions.
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