Category: Orchid Doctor

CULTURE: When in Doubt

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Any epiphytic but unknown plant is best grown on a horizontal piece of cork oak bark with some moss festooned at the roots; any terrestrial plant is best placed in live sphagnum moss and kept moist... Read More

CUT SURFACES: Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago To prevent bacteria from entering plant tissues use powdered sulfur or a paste made with a fungicide. OIE85Nov-19 Read More

CUTWORMS: Climbing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 1" long, grey with dark edging; they eat tips of buds, leaves, flowers; find them at night; drench with Sevin WP. Irene Kothuber Read More

CYCNOCHES: Growth Cycle

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Vigorous growers1 root systems are quickly reestablished in spring, then growth of leaves is rapid and vulnerable to fungicide and pesticide; by mid-summer it is mature and pseudobulbs swell and th... Read More

CYGON 2E: A Systemic Insecticide, How to Apply

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago As a spray put 9 cc. in one gallon of water, or, 1 quart in 100 gallons of water; or, 2 ttpg.; reported injury to plants has not been proven out. A69-700 Read More

CYGON 2E: As a Regular Spray

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use 3 tpg spray when temperature is below 70 Deg F. for control of scale and mealybug. A82-690 Read More

CYGON 2E: Compared with Cygon 4e

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cygon 2E is 22% dimethoate and Cygon 4E is likely 43%; Cygon 4E is also a different formulation; avoid putting it on buds; it is often phytotoxic. A71-345; OD65-169(213) Read More

CYGON 2E: Damage to Plants Claimed

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It consistently caused injury to Dendrobium moschatum, Den. pulchellum and a few others. A77-905 Read More

CYGON 2E: Injury to Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It has been reported for some plants; in the case of cymbidiums a breakdown of color was reported, but suspected as being virus; that should be tested before the spray in condemned. A87-33 Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More