Category: Ailments

NATRIPHENE WP: Fungicide

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For anthracnoses, black rots (Pythium ultimum, Phytophora cactorum), collar rot (Pellicularia (Sclerotium) rolfsii), seedling damp-off (Pellicularia filimentosa,etc.), flower spotting (Botrytis); a... Read More

NATRIPHENE WP: Fungicide/bactericide

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It has an LD-50 of 2,000 mg.; use as a spray, drench or soak for several hours at a concentration of 1:2,000. A73-810; submerge for one hour in three-quarters tpg. or the equivalent of 1:2,000, and... Read More

PHYSAN: Viruscide

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago All quaternary ammonium compounds, which this is are oxidizers and when used to sterilize cutting tools they need to be dried out for the necessary action to take place. OA81-152 Read More

NATRIPHENE WP: Is Drench or Soak Necessary?

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is a virtual necessity; if plants are kept dry between times,two or three treatments seven to eight days apart should suffice for treatment. A70-916 Read More

BLACK MOLD: On Dendrobiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Probably arises from the punctures made by aphids; eliminate them with Piramor at 3 grams to 2 gallons of water, or with Malathion at ltpg. plus 1/2 teaspoon of a wetting agent, or 10 drops of dish... Read More

BLACK ROT: Leads Go Black, Leaves Change to Lighter Color and Wrinkle; Pseudobulbs Wrinkle and Show Brown Patches

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Truban is effective; cut off all diseased parts; plunge all into solution 1 tpg. A74-1062 Read More

BLACK ROT: Leaves on Cattleyas Develop Black Spot At Top, Eventually Killing Leaf and Sheath

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use Dexon-35 or Truban, 1 tpg. as an overall drench, or soak for 20 to 30 minutes; repeat in 14 days. A72-905; A79-1112 Read More

BLACK ROT: On Specimen Cattleya; Benlate Does Not Cure

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Black rot is not cured by Benlate, use Dexon-35, 1 tpg. soak for 20 minutes. A74-217 Read More

BLACK FLY: Common in Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Thrives in wet soil or media; tiny white larvae dwell in media; adults flutter up when disturbed; do no damage; (leave excreta balls on foliage); a nuisance; control with malathion. N329 Read More

BOTRYTIS: On Orchid Blossoms

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Fungus spores germinate during humid conditions, usually at night; there are six kinds that do this; a drop in humidity plus clear days will stop development; fans that produce gentle but definite ... Read More