Category: Ailments

VIRUS: Testing for

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago By chloroplast agglutination, agar double dif fusion, ELISA, etc.; refer to AH86-25; others, OA83-168 Read More

VIRUS CONTROL BY FLAME OR HEAT: Control by Heat Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago While heat-treating sugar cane before planting should work to inactivate the virus, no one has applied it to orchids successfully. A74-502; has been tried by Lawson at Beltsville. OWD Read More

BENLATE: A Systemic Fungicide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago (Benomyl) Benlate 50WP can be sprayed 3 times at two-week intervals to control most fungal diseases; thereafter monthly. A77-905Has an LD50 of 9590 and is safe for many species; controls botrytis, ... Read More

COCKROACHES: Characteristics and Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Three species are found in greenhouses; they eat stems and skeletonize the flowers; for control use Diazinon or Baygon; apply to benches, crevices and other hiding places. AH9 Read More

CALCIUM: Deficiency

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Black areas appear on cattleyas during hot weather but they are not likely caused by sunburn although the symptoms are similar; deficiency symptoms are most prevalent when cattleyas are in active g... Read More

CROWN ROT: Bacterial Disease

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Benomyl will not control it, use a bactericide and keep water out of the crowns. OIE87Jan-3 Read More

BEES: As Pest in Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Spring is when they appear most; bumblebees seek out cymbidiums; honey-bees are a lesser nuisance. OR74-226They can pollinate some plants, and cause flowers to fade; screen air openings; use a swat... Read More

ORCHID FLY: Eurytoma Orchidearum

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Found in Florida; not a fly but a wasp about one-eighth inch; a serious threat where present; the larvae feed within the plant tissue; no control given; illus. DK14+ Read More

ALGAE: To Prevent Growth in Tanks

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Drain the tank; add Clorox 1 ttpg. and let stand one and a half hours; drain, replace with clear water. A65-53 Read More

PESTICIDES: Shelf Life

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They should be purchased for short-term use; mark the date of purchase on the container; most keep their effectiveness for two or more years if stpred properly; signs of ineffectiveness in dusts an... Read More