There are various ways in which one can deal with tent caterpillars. There are natural ways and chemical ways. In around three weeks the caterpillars usually disappear of their own accord, and they are not a very great risk to trees. Natural methods include getting some poultry and feeding the insects to the birds.
Others involve using clippers to kill them by physically clipping the insects. A natural pesticide can be made from chrysanthemums, this is still poisonous so be careful. Kerosene can also be used to burn the insects but this can damage the tree as well. You can also simply apply kerosene to the larvae. A pesticide that is widely used to spray the caterpillars with is Bacillus thuringiensis. Whatever steps you decide to take remember that is during the twilight hours of morning and evening that are best suited as the insects return to their nests after their feeding frenzies.
Others involve using clippers to kill them by physically clipping the insects. A natural pesticide can be made from chrysanthemums, this is still poisonous so be careful. Kerosene can also be used to burn the insects but this can damage the tree as well. You can also simply apply kerosene to the larvae. A pesticide that is widely used to spray the caterpillars with is Bacillus thuringiensis. Whatever steps you decide to take remember that is during the twilight hours of morning and evening that are best suited as the insects return to their nests after their feeding frenzies.