Category: Orchid Doctor

PHYSICAL CHARACTERISTICS: They Indicate General Growing Requirements

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Terete leaves require sun; broad thin ones need shade; lengthy erect flower spikes appear on terrestrial or rock growers; arching scapes are typical of epiphytes such as oncidiums but 0.splendidum ... Read More

PHYSIOLOGICAL DISORDERS: Not Caused by Insects

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Commentary on those problems connected with water, light, nutrient problems, potting faults, weeds, chemical toxity, air pollution, and miscellaneous causes; refer to A86-92 Read More

PHYTOPHTHORA: Black Rot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Controls recommended: Captan at 1 ttpg.; Dexon at 1.5 ttpg. used as a spray or drench, where the whole plant is immersed. P71(2)-24; controls: Truban, Banrot, Physan 20. A80-356 Read More

PHYTORHTHORA: Black Rot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It may also be caused by Pythium ultimum most destructive on cattleya types; high humidity favors it, so water into the pot and not on the leaves; control it with Truban drench at Hpg. AH86-72 Read More

PHYTOSANITARY CERTIFICATES: Necessity for

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Before moving plants from one state, to another, especially to California, call your county agriculture agent to obtain one. A79-674 Read More

PIGMENTATION: In Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are either (a) sap-soluble or (b) sap-insoluble and are responsible for specific colors; (a) Anthocyanins (Red, blue, violet) Flavones (Yellow);and (b) Chloroplasts (contain chlorophyll, and g... Read More

PIGMENTATION: Reddish Pigment in Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Anthocyanins in leaves gives a clue to their living in quite strong light; the pigmentation is a protective device againt burning. A74-9 Read More

PILL BUGS: Infestation in Cattleya Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Spray Diazinon 50%WP on the surface at 1 ttpg., or 1 lb. per 50 gals, water. A75-500 Read More

PINCHING: Disbudding Some of the Growths

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Taking some buds off will provide additional strength for those left on the spike and will improve flower quality; on weak plants the dormant bud in the leaf axil can be removed to improve the flow... Read More

PINCHING: Removing New Growths on Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When a lead growth was removed for meristemming from a number of plants, a large percentage started thtee or four new growths which developed and flowered. A67-15 Read More