Orchid Q&A

* Air Conditioning
* Ansellia africana
* Aquarium Water
* Brassavola Care
* Black Growths
* Brassavola Care
* Calanthe Culture
* Catts in Hawaii
* Change of Environment
* Coconut Husk
* Cymbidiella rhodocheila
* Culture of Alba Orchids
* Dehydration
* Dendrobium Care
* Dendrobium Repotting
* Dendrochilum magnum
* Dormancy
* Dry Conditions
* 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



Q.

Orchid Honeydew
Can you tell me what the secretions are that some orchid plants put out around the stems of their flowers? Sometimes it is sticky and develops sooty mold like on Grammatopyllum scriptum. On other orchids, such as Oncidium Sharry Baby, it is more watery. I find it seems to appear in the morning.? — Tessa Harris

 

A.

he secretion is simply plant sap, called honeydew, which is secreted by healthy plants. It is, as you note, basically sugar water, and can lead to sooty mold. This is why sooty mold can often be an indicator of sucking insects, which feed on this same sap, supplied to them by the plant’s osmotic pressure. When the pressure is sufficiently high, the sap passes right through the bugs’ digestive systems, resulting in conditions favorable for sooty mold. — Ned Nash





Anoles are fond of the sweet exude and can help prevent sooty mold by licking it from buds and flowers.




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