Newly Posted Articles

RUSTS: Sphenosphora Sp. and Uredo Sp.

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago They are usually orange, brown rusty spots found on many genera; cut it off and burn the pieces of infected leaves, or better still, destroy the whole plant; spray with Ferbam or Zineb; Plantvax-75... Read More

SAPROPHYTIC FUNGI: Living on Dead Tissue

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago It sometimes occurs on single plants; thrives under humid, dead air conditions; not a threat but its presence indicates poor culture. N319 Read More

SARAN SHADE CLOTH: For Shading

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago It is most effective as an outside cover especially when supported by a framework that raises it above the glass and thus enables air to circulate between. A63-1012 Read More

SEAWEED: Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Is a favourite of some growers because it has a good complement of trace elements. OIE86Jy-10; in England seaweed derivatives are used by many growers because they supply both major and minor nutri... Read More

SEED BANKS: Cryogenic Gene Bank

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago At the University of California, Irvine, CA 92717, the Arboretum is developing facilities for preserving seed for the distant future; it requires assistance. A86-249 Read More

SEED: Irradiated

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Use of X-rays, gamma and beta-rays on orchid seeds to produce mutants may have discouraging effects as the surviving plants may not produce recognizable or desirable ones. A59-688 Read More

SHADING: For Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago In California use 73% for both them and Paphiopedilums. A86-719In New York State in winter use not more than 25%. A81-688 Read More

SOAPS: As Insecticides

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Detergents are as good as soaps; liquid soap is as good as dissolved chips from bar soaps, any popular brand of soap is as good (almost) as a commercial soap insecticide but they must be used with ... Read More

SPIDERS: In the Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago They are mighty hunters of insects; Miturga lineata with a three inch leg-spread, brown and gray, moderately hairy is very useful; enough of them can keep a house free of insects; they hide during ... Read More

SPIKE WEIGHTS: To Pull Flower Spikes Upright

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago The retractable rollers are popular in places but they lose their springiness; a substitute can be rigged by placing a thin pipe horizontally about four feet above the flower spikes, and hanging ov... Read More