&middotDrought damage - needles gradually turn yellowish-green and then light brown. This starts at the top of the tree and progresses downward and from the outside in. &middotAnimal injury - dog urine can cause some browning and dropping of lower branches on arborvitae and junipers.
There are many different brands of cat flea collars. Generally, flea collars work by either emitting a toxic gas to the local area (head/neck of the pet) or by exuding chemicals that are absorbed into the animal's skin. Some flea collars have an Insect Growth Regulator (IGR), to prevent development of cat fleas, eggs and larvae.
Flea collars are the oldest but not necessarily the most effective method of flea control for dogs. A flea collar is a plastic collar designed to gradually release pesticides that kill adult fleas on the animal wearing it.First introduced in 1964, flea collars are one of the oldest flea control products available today.lea collars are significantly less expensive than other flea control products currently available on the market. They are also long-lasting, with some brands claiming to maintain effectiveness for up to 12 months.