Category: Ailments

SEPAL WILT: Ethylene Injury Prevention

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Silver ion (Ag+) is very effective in preventing dry-sepal (ethylene) injury on Cattleya flowers as it will protect them from doses 30 times as strong. Hort. science,1976-174 Read More

BLACK SHEATHS: Fungus Disease

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Occurs especially under humid conditions and when water stands at base of the sheaths; cut off sheath above buds and spray with Tersan, Zineb or Natriphene. N319; cut off just above buds. S203 Read More

FLOWERS: Streaky, Cause Unknown

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It may be caused by an insecticide but not likely; Diazinon 50WP not likely the cause; but individual plants show surprising toxicity reactions; low humidity not a factor; possibly virus. A79-674 Read More

FLOWERS: Whitish "etching" Damage on Petals

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It ruins blooms of such as Dend. phalaenopsis and others; can be caused by chemical spray burns, or a calcium residue from hard tap water. A85-192 Read More

FUNGUS GNATS: A Nuisance or a Problem

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Control them with proper sanitation, avoidance of over-watering; spray them with diazinon or give them a drench Resmethrin 1% aerosol controls the adults. AH86-59 Read More

BLACK SHEATHS: Caused by Fungi Under Excessively Damp Conditions

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Prevent spread to buds within by cutting off tops of sheaths to let in air; spray with Physan or Tersan. A73-815 Read More

BLISTERS: On the Tips of Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Not uncommon; are due to various causes; will not spread or cause harm. A72-204 Read More

BUSH SNAILS: Control in the Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In tests, metaldehyde was the most effective bait; method of application is important; a dozen brands tested were ineffective and blocked drainage; liquid sprays were partly effective; 2 ttpg. of 2... Read More

BUSH SNAILS: In Bark

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Sevin 50%WP did not eliminate them all; use Mesurol plus metaldehyde in pellet form. A77-527 Read More

BUSH SNAILS: Method of Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Mesurol 50% used as a drench achieved 100% control; use 1 lb. to 100 gallons of water. A73-28 Read More