Does cedar wood repel insects?
Moreover, does cedar wood repel spiders?
Spiders are arachnids, meaning they have a different physiology than insects, and many repellents and insecticides will not work on spiders, unless you spray the spider liberally and directly. Some people use the wood or oil of cedar (Cedrus) in the home to repel spiders because cedar does repel certain insects.
Likewise, why do bugs hate cedar?
The secret to cedar's ability to run off a whole host of unwanted critters are aromatic hydrocarbons (phenols) and acids it contains that are toxic. The phenols, which give cedar its delightful earthy scent, are what repels fleas, moths, cockroaches, venomous snakes, mice and rats.
Sucking pests such as scales and aphids feed on cedar trees. These bugs feed on inner tissue fluid by literally sucking it from the plant. Damage includes distorted leaves and plant parts, yellowed leaves and premature leaf drop. Armored scales such as pine needle scales often infest cedar trees.