If people only have a plant to two, they can use Safer Insecticidal Soap mixed with some alcohol. This needs to be applied to both sides of the leaves and wiped on thoroughly with a sponge. Get the solution deep into all crevices. It is recommended this be done three times a day at ten day intervals. Otherwise, Orthene wettable powder, a heavy duty pesticide, not easily available in California, is required.
Aphids are the other most frequently encountered pest.
They are usually noticed on the buds and flowers and can sometimes be discouraged by wiping the colonies off by hand, or by misting them off with water. A soap spray can be effective if you keep after the pest. Snails and slugs, fortunately, are easily controlled through a conscientious baiting program. Flowers Cymbidiums normally bloom from November to May in Sonoma County, depending on the variety and the growing conditions. Flower spikes are prone to snail and slug damage, so protect plants and spikes from these pests.