Orchid Q&A

* Air Conditioning
* Ansellia africana
* Aquarium Water
* Brassavola Care
* Brassavola Little Stars
* Black Growths
* Brassavola Care
* Calanthe Culture
* Catts in Hawaii
* Change of Environment
* Coconut Husk
* Cymbidiella rhodocheila
* Cymbidium Care
* Cymbidium Foliage
* Culture of Alba Orchids
* Dehydration
* Dendrobium Care
* Dendrobium Repotting
* Dendrochilum magnum
* Dormancy
* Dry Conditions
* Encyclia lancifolia
* Epsom Salts
* Eulophia species
* Fertilizer Injector Dosage
* Flowering Vanilla
* Habenaria rhodocheila
* Holcoglossum kimballiana
* Inobulbum munificum
* Jewel Orchids
* Judging Orchids
* Leaf Color
* Leaf Residue
Leaftip Burn
* Liparis viridiflora


I have been fighting an ongoing mealybug infestation in my Phalaenopsis collection for more than two years. Using insecticides has caused me more problems than it cured. Lately, I have been using Ultrafine Sun Oil pesticide, but if I stop for a week, the bugs come right back. I have been told that systemic pesticides do not work on orchids. Is this true? Can you recommend a safe and effective pesticide for my problem? — Steven Schneider




I have never found systemic insecticides particularly effective against mealybugs. However, Orthene does seem to be good for treatment when used at the strength recommended on the label. Because mealybugs are such a problem with fast-growing, soft-leaved orchids like Phalaenopsis, it is important to bring them under control, and then treat as necessary to keep an infestation from reestablishing. The classic prescription is to treat every seven to 10 days for three treatments, alternating insecticides. For example, you might choose to use Orthene and Malathion. The use of a wetting agent is also important with mealybugs to penetrate their waxy coatings. —
Ned Nash

The best time to control mealybugs is when there are just a few. They multiply rapidly and control becomes difficult. . photo º 1998 Greg Allikas

Orchid Q&A

* Masdevallia coccinea
* Mastering Miltonias
* Maxillaria sophronitis
* Mealybug Infestation
* Meristemming Monopodials
* Missing Pollen
* Night Length
* Night Lights
* No Flowers
* Non-flowering Doritaenopsis
* Oncostele Wildcat
* Oncidium Sharry Baby
* Orchid Honeydew
* Paphinia herrerae
* Paphiopedilum armeniacum
* Paphiopedilum delenatii
Phaius Culture
* Phalaenopsis Problem
Phalaenopsis Spiking
* Plant Sitter
* Psychopsis papilio
* Rainwater Collection
* Redwood Bark
* Re-rooting Plants
* Spotted Oncidum Leaves
Sticking Flowers
* Storing Pollen
The Larger the Better
* Vanda Keiki
* Virus Question
* Volck Oil Spray