Category: Orchid Doctor

ROOT ROT: Rhizoctonia

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Control: use Captan at 1 ttpg. as a spray or Terraclor at 1 ttpg. as a drench; also, Chinosol, oxyquinolate benzoate, or sodium-o-phenylphenate (Natriphene) in a 1:2,000 solution; drench. P71(2)-24 Read More

ROOT ROT: Rhizoctonia Solani

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Brown rot usually confined to roots, sometimes enters the rhizome; the decline of plant is gradual; cut off all affected parts; drench with Benlate at 1 ttpg. or Banrot at 1 ttpg. if Phytophora cac... Read More

ROOT ROT: Various Fungi Cause it

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The first visible symptoms may be a yellowing of the pseudobulbs from the base upwards; cut off all rotted roots and infected sections of the rhizome together with affected parts; soak the good par... Read More

ROOT TIPS: Adventitious Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago May be of significance for meristemming of the Catasetum-Mormodes-Cycnoches alliance; Catasetum roseum under cultivation, and Mormodes luxatum in the wild both grew mature plants from the roots. OD... Read More

ROOT TIPS: Blacken or Recede on Cattleyas Before Growing Again

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A condition usually due to excess salts, especially sodium in the water, or by excessively strong fertilizer solution. A70-345 Read More

ROOT TIPS: Browning and Streaking

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It may not be caused by too-alkaline water; the causes are either excess of inorganic salt buildup, or excess acidity; accidental chilling of the root tips is an overlooked possibility; try using w... Read More

ROOT TIPS: Eaten Away

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago This is usually caused by small hard-shell (Bush) snails less than i-inch in size; treat with Mesurol or metaldehyde. A82-352 Read More

ROOTING HORMONES: Added to the Watering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A possibility, but after the seedlings are well established, rooting hormones are not likely to help. A66-842 Read More

ROOTING HORMONES: Rootone or Transplantone

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Such hormones are not necessary when repotting divisions. A75-1007 Read More

ROOTING: To Induce it

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Keep the plant dry at the base but provide a moist atmosphere by means of a plastic bag covering the whole plant until roots regenerate. A82-352 Read More