Newly Posted Articles

CYMBIDIUMS: Culture to Induce Spiking

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago "full-sun" treatment can be successful; give as much sun as possible in the summer including risk of sunburn and with more water and fertilizer, OD68-244The day-night temperature change must be 20 ... Read More

BACTERIAL INFECTION: Phalaenopsis Leaves Yellowed, Shrivelled a Bit and Fell Off

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago If phalaenopsis are grown too cold they are susceptible to bacterial infections; keep night temperatures at 66 to 68 degrees F. A69-242 Read More

VARIETIES: Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A group of organisms within a species that differs from the other members or groups in one or more minor characteristics but not enough to justify a new specific epithet. ODA72-135A variety is a we... Read More

RUSTS: Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Captan and Ferbam are not used with official approval in combatting them, and to those can be added Fore/ Dithane for use on dendrobiums; some of the better ones, not yet legal are Bayleton, Trifor... Read More

RUSTS: Frequently Found in the Wild

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Some imported plants may carry rust fungi; can be seen as masses of yellow to orange spores; treat with copper containing fungicide, such as Bordeaux mixture or Tersan. A66-558; A73-815; S203; copp... Read More

SALTS, FERTILIZER: In Water

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They burn the root tips where they enter the potting medium m this means there is too much chloride, sodium or bicarbonates on the potting surface. A71-917; A71-1102 Read More

RUSTS: On Leaves of Several Genera

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Rust disease is caused by a fungus, the appearance of rust on plants may also be caused by unstable iron in the water supply; a specimen leaf should be checked by the Dept. of Agriculture; address ... Read More

RUSTS: Sphenosphora Kevorkianii, Etc.

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Found on Epid. tampense; small orange areas or pustules under the leaves; they turn black, are sometimes concentric; only the leaves are attacked; cut them off; try Plantvax-75W, or ferbam, or capt... Read More

RUSTS: Sphenosphora Mera

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Attacks various orchids; on cycnoches it is found under the leaves as tiny raised cinnamon brown areas; when ruptured they spread spores; remove and burn plants; or spray with ferbam, or Plantvax 7... Read More

PUMICE: Definition

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A light, spongy stone thrown up by volcanoes. A75-712; RMH Read More

Ailments

(931 articles)

Angraecoids

(41 articles)

Announcements

(4 articles)

Beginners

(21 articles)

Book Review

(4 articles)

Bulbophyllums

(2 articles)

Cattleya Alliance

(95 articles)

Conservation

(16 articles)

Culture

(1363 articles)

Curiosity

(49 articles)

Cymbidiums

(163 articles)

Dendrobiums

(29 articles)

General Discussion

(3 articles)

Oncidium Alliance

(64 articles)

Orchid Doctor

(3579 articles)

OrchidWiz

(27 articles)

Other Genera

(12 articles)

Paph Alliance

(78 articles)

Phalaenopsis

(83 articles)

Pleurothallids

(1 articles)

Propagation

(184 articles)

Scientific

(4 articles)

Site Navigation

(2 articles)

Species

(62 articles)

Travelogue

(2 articles)

Vandaceous

(26 articles)