Sometimes people have come up with alternative ideas that actually work on real-life problems. Below are some ideas that you can use for some reoccurring problems in the greenhouse or in your growing area.
With any thing that you apply to your plants (fungicides, insecticides, etc.) you are urged to try them the first time in a cautious manner and to observe the plant for signs of success and signs of stress to the plant. It should be noted that plants with thin, delicate foliage will no doubt have a more dramatic response as compared to those with thick or leathery foliage.
We all seem to grow weeds on the greenhouse floor or between pavers. Instead of using herbicides, spray full-strength vinegar on the weeds. Just as you would not spray herbicides on your orchids do not spray vinegar on your orchids.
Spraying your plants with 3/4 of a 325 mg tablet of aspirin with a gallon of water will help protect plants from fungal and viral pathogens. Do Not use the whole tablet as this may prove toxic to the plant.
In a one gallon container mix the following, one pint (0.5L) rubbing alcohol, one pint (0.5L) 409 brand spray cleaner, and three quarts (2.8L) of water. Use this mixture as a spray on your plants.
Isopropyl alcohol, also known as rubbing alcohol, can be used to treat scale, mealybugs, thrips, aphids, red spider mites and perhaps other pests. It will only work if it comes in direct contact with the pest while wet, once it dries it has no effect on pests.
Orchid Crown Rot
It has been reported that Neosporin ointment can be used to treat orchid crown rot. Once the rotted area has been removed the ointment is applied to the good tissue. There are generic brand alternatives to Neosporin, these may also work.