Newly Posted Articles

RUTGERS MIX: Potting Media

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Sometimes called the 7-1-1-1 mix; 7 parts fir bark, 1 part peat moss (coarse or poultry peat), 1 part Palco wool, 1 part coarse perlite; it has a higher pH than the Off mix; seems to have a proper ... Read More

MITES (GENERAL): Finding Them

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Look initially for silvery damage under the leaf where the cell juices have been sucked out, in patches or in a general area; compare a new leaf with an old one; use a hand lens to be certain. OA71... Read More

DAMP-OFF: Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Spray Captan at 1 ttpg., or PCNB (Terraclor) at 1 ttpg. as pot drench; also Chinasol, oxyquinoline benzoate (Wilson Anti-Damp), or sodium-o-phenylphanate (Dowicide Ai, Natriphene, Sopp, or Topane) ... Read More

MITES (GENERAL): Controls, in Increasing Degrees of Toxicity to the User

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Chlorobenzilate (6oz. required for LD-50) aramite (4oz.) kelthane and dimite (loz. the most lethal);Ethion (too toxic at 1/2 oz.) and Demeton (extremely toxic at 8 drops) are not recommended. A68-5... Read More

MITES, FALSE SPIDER: Spraying with Kelthane as Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Believed to have stunted some phalaenopsis plants; two tpg. could not cause the injury; perhaps three tpg. might do so,but unlikely; cause not certain. A74-792 use liquid 1 tpg.or powder 1.5-2 ttpg... Read More

MOVING ORCHIDS: From Greenhouse to Greenhouse, En Masse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In winter recourse to expedients can bring mixed results and some failures, for details refer to OR82-251;252 Read More

CYMBIDIUMS: Culture to Induce Spiking

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago "full-sun" treatment can be successful; give as much sun as possible in the summer including risk of sunburn and with more water and fertilizer, OD68-244The day-night temperature change must be 20 ... Read More

MITES, FALSE SPIDER: A Most Destructive Pest

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Smaller than the two-spotted mite, does not spin webs; not visible to the naked eye; reddish in color; cast white skins often present in great numbers is sign of -their presence; common ones are,Ph... Read More

BACTERIAL BROWN SPOT: On Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Soft water-soaked lesion; turns black or brown; spray with Physan 20, 1/2 ttpg.; repeat as needed. A66-403; A73-888; AH19 Read More

PUMICE: Definition

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A light, spongy stone thrown up by volcanoes. A75-712; RMH Read More