&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.
Adult fleas feed on cat blood; in young kittens this can cause weakness, anaemia and death. Fleas are important in the transmission of âcat scratch diseaseâ between cats and to humans. This is an infection with the bacterium Bartonella hensellae, and is spread when fleas feed on blood. Some dogs and cats develop an allergy to flea bites, which causes them to scratch excessively or develop skin disease. Cat fleas can cause itchy bites on sensitive humans, typically around the ankles .