Category: Orchid Doctor

PHOTOSYNTHESIS: Rates of Activity

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It starts functioning at 6 dF; at 62 dF it achieves 60% of full activity; at 70 dF it is 83%, at SO dF it is 100%, at 90 Deg. it is 80%, at lOOd it is 40% and at llOd it does not function. AU87(2)-17 Read More

PHOTOTROPISM: Its Importance

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is not so important for orchids as it is for other plants requiring high light intensity; give them good exposure to optimum light levels. A67-811When a plant is moved in the greenhouse or under... Read More

PHRAGMIPEDIUMS: Temperatures Preferred

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Like paphiopedilums, they need a nightime temperature of about 57 dF after November. A80-1140 Read More

PHYSAN 20: Active Ingredients

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is a combination of quaternaray ammonium chlorides, like Shield, Roccal, etc. A77-702; RMHN-alkyl (60% C14, 30% C16, 5% C18) = 10%; n-alkyl (68% C12,32% C14); dimethyl ethylbenzyl, ammonium chlo... Read More

PHYSAN 20: Algicide, Bactericide, Deodorizer, Fungicide and Viruscide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is useful in wet and humid places; can sterilize some cutting instruments if immersed for about 12 minutes. A73-811 Read More

PHYSAN 20: Application

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use 1/2 to 1.5 tpg. for most fungus and bacteria; use 2 ttpg. for sterilizing tools. A79-272 Read More

PHYSAN 20: Deterioration on Standing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It loses its effectiveness by repeated use but the solution may not deteriorate just on standing. A76-14 Read More

PHYSAN 20: Harmful to Some Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It has harmed roots of paphiopedilum at one-quarter strength solution when plants were dipped at repotting. A78-302 Read More

PHYSAN 20: Properties

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The new (1979) name for Consan is Physan 20; use it to sterilize tools (slowly) control algae, and many diseases of orchids; it can also prolong the life of cut flowers. A76-115; A79-1112;C72-169 Read More

PHYSAN 20: Spraying Monthly

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Too frequent spraying with it may cause toxicity; use benomyl occasionally alternately. A80-254 Read More