Physan 20

Physan 20 For Use On Orchids

WORK AREAS, BENCHES, TRAYS
Spray or swab working surfaces before each work period, and again after each plant is completed to kill such diseases as Botrytis, Crown Rot, Downy Mildew, Root Rot, etc.
Use: 1 tablespoon PHYSAN 20 per gallon of water.

POTS AND FLATS
Used pots or flats should be brushed or washed first, then soaked in PHYSAN 20 solution for 10 minutes before using to kill such diseases as Crown Rot, Mildew, Root Rot and Rusts. Do not rinse.
Use: 1 tablespoon PHYSAN 20 per gallon of water.

CUTTING TOOLS
Soak cutting edge of tool for 10 minutes in PHYSAN 20 solution before use to kill such diseases as Botrytis, Root Rot, Stem Rot, and Tobacco Mosaic Virus (TMV) Use wet tool on plants. At the end of work, dry and oil tools.
Use: 1 teaspoon PHYSAN 20 per quart of water.

SMOKERS
Cigarette smokers have tobacco mosaic virus on their hands. Dip hands in solution before handling plants or anything connected with the plants. It is a good idea to have a container of PHYSAN 20 solution always available as a hand dip. Allow to air dry.
Use: 1 Tablespoon PHYSAN 20 per gallon of water.

SEEDLINGS
From flask: soak seedlings 2-5 minutes before potting to remove agar. Soak compost with PHYSAN 20 solution. Helps eliminate damp-off. Keep hands and tools damp with PHYSAN 20 solution. Damp-off: Spray seedlings once per month as preventative maintenance. Spray anytime disease is evident.
Use: 1-1/2 tsp. PHYSAN 20 per gallon of water.

ORCHIDS - ADULT PLANTS*
Spray anytime disease other than rot (see below) is evident. Spray once per month as preventative maintenance. Soak compost when fungus is evident.
Use: 2 teaspoons PHYSAN 20 per gallon of water.

ORCHIDS - DIVIDING PLANTS
Remove compost from plant, then soak plant for 2-5 minutes in PHYSAN 20 solution. Operate with wet hands and cutting tools. After division and root trim, soak divisions in PHYSAN 20 solution for 2-5 minutes. Pot in compost dampened with PHYSAN 20 solution.
USE: 1 Tablespoon PHYSAN 20 per gallon of water.

ALGAE
Greenhouse Glass: Spray or swab surfaces with PHYSAN 20 solution. Let stand for one hour or more or until the algae visibly begins to change to a lighter color. Wash off dead algae with water. Spray clean surfaces again with PHYSAN 20 solution.
Use: 1 teaspoon PHYSAN per gallon of water.

Walkways: For heavy algae infestation, spray or swab with PHYSAN 20 solution. Let stand for an hour or more. Brush and wash away the dead algae. Soak area again with PHYSAN 20 solution. Do not rinse. This product will inhibit the growth of algae on walkways. Allow to dry on surface, and repeat application if algae growth returns.
Use: 1 Tablespoon PHYSAN per gallon of water.

ORCHIDS - BOTRYTIS*
During cool damp weather, spray plants, flowers and under benches at first sign of the spotting on flowers. Normally weekly spray will greatly reduce or eliminate the botrytis spotting.
Use: 1 teaspoon PHYSAN 20 per 3 gallons of water.

CUT FLOWERS
For containers, tubes and decorative vases. Recommend flower spikes be hardened in PHYSAN 20 treated water during harvesting, storage and shipping.
USE: 1 teaspoon PHYSAN per 2 gallons of water.

ORCHID - ROT (such as Erwinia)*
Remove compost from plant, then soak entire plant 10 minutes or more. Cut away all rot with treated tool. Soak plant wounds again for 10 minutes. Repot in PHYSAN 20 soaked compost.
USE: 1 Tablespoon PHYSAN 20 per gallon of water.

ORCHIDS - CROWN ROT (Phalaenopsis)*
Spray plants weekly to assure solution getting around and in base of leaves.
USE: 1 teaspoon PHYSAN 20 per gallon of water.

*Physan 20 has Federal EPA approval for these specific applications on orchids in 49 states. In California only, these applications with asterisks are under review and pending CAL-EPA approval.

RECIRCULATING OVERHEAD WATERING SYSTEMS
During the last 2-3 minutes of watering, use PHYSAN 20 solution as a preventative program. Due to variations in growing conditions, use PHYSAN 20 every second to fourth watering. Will control algae in nozzles.
USE: 1 ounce PHYSAN to 20 gallons of water.

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Physan 20 For Use On African Violets

‘NEW MEDICINE FOR OLD ILLS’

Mrs. J.B. (DoDe) Whitaker
DoDe’s Gardens, Inc.

Among the new friends of the African violet is Physan 20.

This totally safe material ‘controls’ fungus, virus, bacteria, mildew and algae. Physan can literally be used in your plant room and also to clean your kitchen and bath.

Physan is a biodegradable product with no odor and one which really goes into mixture easily. It does not leave a residue or marking on the plant foliage.

This product is a wonderful overall sterilizing agent.

The following are some of the many ways in which Physan can help you:

Spray workbenches and working surfaces before, during and after planting with 1 tablespoon of Physan per gallon water.
Wash pots and flats, then soak them in solution of 1 tablespoon Physan per gallon water for 10 minutes. Do not rinse.
Soak cutting edges of tools in 1 teaspoon Physan per gallon water before use.
Keep hands and tools damp with Physan solution when working with plants so not to spread disease. Use 1- teaspoons Physan per gallon of water.
Soak small plantlets for 1 minute in solution of 1- teaspoon Physan per gallon of warm water to help eliminate dampoff. Spray with this mixture once a week to prevent dampoff while the plantlets are becoming established.
Spray or immerse plant and pot in solution of one tablespoon Physan to four gallons of water to ward off and control fungal problems.
Adding one teaspoon of Physan to each gallon of water used in floral arrangements will extend the flower life and control odor.
Physan is helpful in preventing algae on capillary matting when used at the rate of 1 tablespoon per gallon of water and placed in the reservoir and/or on the matting with each watering. Three fourths of a teaspoon of Physan may be added to each gallon of water used in individual reservoirs. This also acts as a fungicide.

Courtesy of African Violet Magazine, June 1983

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Physan 20 For Use On Hardscape Surfaces

PHYSAN 20 is effective at controlling algae on bricks, cement, walkways, walls, statuary, stucco, and other hardscape surfaces. PHYSAN 20 will retard algae growth for a 10-14 day period after it is applied. Reapplication every 10-14 days is recommended to prevent algae recurrence.

Mixing and application directions:

Dilution rate: I tablespoon PHYSAN 20 in one gallon of water.

For heavy infestation, spray or swab. Let stand for one hour or more. Brush and wash away dead algae. Soak area again with PHYSAN 20 solution. Do not rinse. This product will inhibit the growth of algae on walkways. Allow to dry on surface, and repeat when algae growth returns.

NOTE: PHYSAN 20 can be used to retard and prevent algae growth on soil in the presence of plants and turf. However, the dilution rates for these applications are different (and smaller) than for algae control on hard surfaces. For these rates see SEEDS/SEEDLINGS/CUT FLOWER INSTRUCTIONS.

Conversion Chart

US 1 tsp. 2 tsp. 3 tsp. 2T 8 oz. 16 oz. 32 oz.

1 T 1 oz. 1/2 pint 1 pint 1 quart

METRIC 5 ml. 10 ml. 15 ml. 30 ml. 240 ml. 480 ml. 960 ml.

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Physan 20 For Use With Fountains, Birdbaths, and Decorative Water Displays

PHYSAN 20 is effective at controlling algae and odor in fountains, birdbaths, swimming pools and decorative water displays. PHYSAN 20 is simple to apply, and safe around birds, mammals and plants.

WARNING: PHYSAN 20 IS TOXIC TO FISH! It should not be used in the presence of fish.

Mixing and application directions:

Initial Dose: Add 1 teaspoon PHYSAN 20 per 52 gallons of water (I ounce per 312 gallons of water) to achieve a concentration of 5 parts per million.

Weekly Dose: Add 1 teaspoon PHYSAN 20 per 104 gallons of water each week to maintain a concentration of 2-3 parts per million.

Note: PHYSAN 20 should only be used in contained water displays that recirculate, not in ponds, estuaries, or other bodies of water that could drain into fish bearing waters.

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Physan 20 For Use With Seeds, Seedlings, and Cut Flowers

PHYSAN 20 controls the growth of algae, bacterial and fungal pathogens which can harm seeds, seedlings and cut flowers.

Mixing and application directions:

Cut Flowers in containers, tubes, and decorative vases - Bacterial Stem Plugging.
To eliminate stem plugging (which restricts uptake of water) and to control bacteria and fungi ( which create ethylene gas, a cause of petal drop), flower spikes should be hardened by keeping the stems in PHYSAN 20 solution during harvesting, storage and shipping.
USE: 1 teaspoon of PHYSAN 20 concentrate in 1 gallon of water.

Plant Cuttings - Begonia, Chrysanthemum, Fuchsia, and Geranium.
For controlling Crown Gall, Gray Mold Leaf Spots, and Powdery Mildew, soak completely immersed cuttings 2-5 minutes in 1-1/2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water. Plant in compost completely saturated in PHYSAN 20 solution.
USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

Seeds and Seedlings - Damping Off
Treat seeds and seedlings by soaking in a solution of 1 1/2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water for 5 minutes. Fill the flask containing the seed or seedlings with enough PHYSAN 20 solution to completely cover the seeds/seedlings. Drain the PHYSAN 20 solution off the seeds/seedlings before planting.
Use a fresh solution of PHYSAN 20 for each flask.

Seedlings - Damping Off (ornamental plants only)
Make a solution of 1 1/2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water. Soak seedlings in PHYSAN 20 for 5 minutes. Use a soak container large enough to completely immerse one flask of seedlings at a time. Change the solution daily or more often if solution becomes visibly dirty.

If a garden soil is used for planting seedlings, completely saturate the soil in PHYSAN 20. Place the soil in a pot or tray and add enough PHYSAN 20 solution to completely cover the soil. Let the solution drain through the soil or pour off excess.
USE: 1 1/2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

PHYSAN 20 solution is effective in stopping the spread of damping off when sprayed on seedlings. Spray seedlings so that all surfaces are thoroughly wet.
USE: 2 tablespoons of PHYSAN 20 concentrate in 3 gallons of water or 2 tsp. PHYSAN 20 concentrate in 1 gallon of water.

Seedlings - Downy Mildew (Ornamental Plants only)
Most common on seedlings. The fungus sporulates on the lower surface of leaves as a white, sparse downy growth. The disease can cause the death of aerial plant parts. Spray seedlings so that all surfaces are thoroughly wet with Physan 20 solution at 5-day intervals until under control.
USE: 2 tablespoons of PHYSAN 20 concentrate in 3 gallons of water.

Algae Control on Soil
PHYSAN 20 can be used as a soil drench to control the growth of algae and pathogens in soil.
USE: IF PLANTS ARE NOT PRESENT IN THE SOIL, use 1 tablespoon of PHYSAN 20 concentrate in 1 gallon of water. Do not get any solution on the leaves of plants.

If plants or seedlings are present, and algae is seen on the =surface of the soil, a more dilute solution must be used.
USE: 1 1/2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water. Spray so that surface of the soil is thoroughly wet.

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Physan 20 For Use With Potted Plants

ORNAMENTAL PLANT APPLICATIONS

PHYSAN 20™ is effective in controlling a wide variety of bacterial, viral, and fungal plant pathogens that can cause disease on many types of ornamental plants.

PHYSAN 20™ is one of the few general purpose disinfectant products which is EPA approved in all 50 states for use on hard surfaces and directly on plants!

For a summary of hard surface and plant applications for PHYSAN 20, you may wish to view and download the PHYSAN 20 Usage and Mixing Guide.

Specific instructions for applying PHYSAN on plants are noted below:

SPECIFIC PLANT APPLICATIONS

African Violets – See Saintpaulia

Aucuba, Dahlia, Fuchsia, Geranium, Gladiolus, Peony, Pieris - Botrytis, Downy Mildew, Gray Mold, and Rusts
Downy mildew primarily affects new growth with symptoms of soft decay of flowers, leaves or stems followed by a covering of downy gray mold. Control of the disease consists of quick removal of dead plant parts and application of PHYSAN 20 at the first signs of disease. For Botrytis, spray buds and blooms lightly 2 to 3 times a week using a fine mist. For Rust, apply at 7 -14 day intervals during wet periods starting in early Summer.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

Begonias, Ferns and Gesneria (corytholoma, isoloma, allopiectus, episcia, trichosporum)- Bud Rot, Gray Mold, Leaf Spots, and Shoot Rot.
All phases of culture. Remove all plant refuse or dead leaves. Garden cleanup is important in control. Spray PHYSAN 20 solution before the buds open. Then spray when blossom petals have fallen. Spray when 3/4 of the blossom petals have fallen. Spray again two weeks after petal fall.

USE: 1 teaspoon of PHYSAN concentrate in 1 gallon of water.

Bulbs - Daffodil, Easter Lilies, Gladioli, Hyacinth, Iris, Narcissus, and Tulips
Pre-storage and pre-planting treatments: Treat the corms and bulbs immediately after they are “cleaned” and treat again immediately before planting by soaking them 10 minutes in PHYSAN 20 solution to control fusarium basal rot. Air dry.

USE: 1 tablespoon PHYSAN 20 concentrate in 1 gallon of water.

Cactus - Bacterial Leaf Spot, Root Rot, Top Rot
For rotting of underground parts by fungi and bacterial leaf spot or rot of the tops, sterilize seeds and disease-free cuttings by dipping in PHYSAN 20 solution for 5 minutes before planting. Spray at 10-14 day intervals.

USE: 2 tablespoons of PHYSAN 20 concentrate in 3 gallons of water.

Cactus - Slimy Collar Rot
Just before planting, dip entire plant in PHYSAN 20 solution.

USE: 2 teaspoons PHYSAN 20 concentrate in 1 gallon of water.

Calendulas, China Asters, Chrysanthemums, Crape Myrtle, Dahlias, Lilac, Live Oak - Powdery Mildew
Spray with PHYSAN 20 solution when symptoms appear. Spray upper and lower surface of leaves and branches with PHYSAN 20 solution until thoroughly wet. Spray when buds burst in Spring and repeat in 2 weeks. Spray with PHYSAN 20 solution every two weeks during mildew season. Also, spray Live Oaks at bud break and again in April.

USE: 2 tablespoons PHYSAN 20 concentrate in 3 gallons of water.

Carnations - Canker Rot, Carnation Rust, Crown Rot, Gray Mold Rot, =Leaf Spots, Root Rot, and Stem Rot.
For Rust, completely immerse cuttings in PHYSAN 20 solution before planting. For Gray Mold, apply PHYSAN 20 solution 1-2 times just before bud bloom. Apply a light mist spray as the flowers are opening. Carefully collect and burn infected buds, blossoms, and stems.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

Crassula, Kalanchoe, and Sedum - Crown Gall, Crown Rot, and Root Rot.
Destroy infected plants or plant parts and drench the remainder with PHYSAN 20 solution. Spray plants weekly to assure solution getting around and in the base of leaves.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

Fuchsia, Gardenia, Geranium, Heliotrope - Bud Rot, Gray Mold and Stem Rot.
At the first sign of disease, pick off and burn infected leaves and blossoms; spray, mist, or fog weekly as needed.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of =water.

Hawthorn (crataegus) - Leaf Blights
After a very wet Spring, small reddish brown spots appear on the upper surfaces of leaves. When spots are numerous, leaves drop. Make 3 spray applications: First, as soon as the leaves emerge from the buds; then when leaves are half grown; and again when fully grown.

USE: 2 tablespoons of PHYSAN 20 concentrate in 3 gallons =of water.

Hawthorn, Hollyhock, Snapdragons - Rust
Spraying for protection should begin with the development of new leaves following Winter cleanup or dormancy. Spraying should begin before the onset of the rainy season. Be sure the undersides of infected leaves are covered by PHYSAN 20 spray solution. For hollyhocks, apply at weekly intervals. Start as soon as growth begins. Repeat applications in late Summer. For snapdragons, collect and burn the tops in the Fall. Avoid sprinkling the foliage while indoors. Apply PHYSAN 20 solution at 7-10 day intervals. Start when plants are set in the garden.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

Iris - Botrytis, Crown Rot of Iris, Gray Mold, Rot on Rhizomatous Iris
Treat all new rhizomes before planting with PHYSAN 20 solution. Submerge rhizomes and 3 to 4 inches of leaves for 30 minutes. Plant at once (while still wet with PHYSAN 20 solution)

USE: 2 tablespoons of PHYSAN 20 concentrate in 3 gallons of water.

Iris - Botrytis Leaf Spots
Circular spots, yellowish, then light brown with red border. Spray weekly while plants are growing.

USE: 2 teaspoons PHYSAN 20 concentrate in 1 gallon of water.

Orchids - Adult Plants
Spray anytime disease other than rot (see below) is evident. Spray once per month as preventive maintenance. Soak compost when fungus is evident.

USE: 2 teaspoons PHYSAN 20 per gallon of water.

Orchids - Botrytis
During cool damp weather, spray plants, flowers and under benches at first sign of the spotting on flowers. Normally weekly spray will greatly reduce or eliminate the botrytis spotting.

USE: 1 teaspoon PHYSAN 20 per 3 gallons of water.

Orchids - Crown Rot - Phaelenopsis
Spray plants weekly to assure solution getting around and in base of leaves.

USE: 1 teaspoon PHYSAN 20 per gallon of water

Orchids - Dividing Plants
Remove compost, then soak plant for 2-5 minutes in PHYSAN 20 solution. Operate with wet hands and cutting tools. After division and root trip, soak divisions in PHYSAN 20 solution 2-5 minutes. Pot in compost dampened with PHYSAN 20 solution.

USE: 1 Tablespoon PHYSAN 20 per gallon of water

Orchids - Rot (such as Erwinia)
Remove compost from plant, then soak entire plant 10 minutes or more. Cut away all rot with treated tool. Soak plant wounds again for 10 minutes. Repot in PHYSAN 20 soaked compost.

USE: 1 Tablespoon PHYSAN 20 per gallon of water.

Palms - Heart Rot and Penicillium Leaf Base Rot
At the first sign of rot, completely fill cup, or "heart” formed by palm branches at top center of plant. Repeat every 7 days until controlled.

USE: 2 tablespoons PHYSAN 20 concentrate in 3 gallons of water.

Roses - Brown Canker
Use regular spraying. Application should begin in early Spring as soon as new growth starts and should be made often enough to provide protection throughout the rainy periods and to keep the new growth covered. On the average, an application once a week will be needed from early Spring until plants are dormant.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water

Roses - Black Spot, Powdery Mildew, Rusts, Stem Gall
Spray with PHYSAN 20 solution when symptoms appear. Spray upper and lower surface of leaves and branches with PHYSAN 20 solution until thoroughly wet. Spray with PHYSAN 20 solution several times, 7 to 10 days apart.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

Rubber Plant - Anthracnose on Leaves and Stems, Crown Gall on Stems
At the first sign of disease, pick off and burn infected leaves, spray, mist or fog weekly with PHYSAN 20 solution as needed.

USE: 1 teaspoon of PHYSAN 20 concentrate in 1 gallon of water.

Saintpaulia (African Violets) - Bud Rot , Crown Rot, Downy Mildew, Gray Mold Rot (Botrytis), Powdery Mildew, Root Rot.
Dip plant and pot in PHYSAN 20 solution. Spraying is okay, but complete coverage of all surfaces is important. Spray every 10 days until controlled.

USE: 1 tablespoon PHYSAN 20 concentrate in 4 gallons of water.

Snapdragons - Anthracnose, Downy Mildew, Phyllosticta Blight, Powdery Mildew, Rusts, Stem Rot, Wilts.
Spray with PHYSAN 20 solution when symptoms appear. Spray upper and lower sides of leaves until thoroughly wet, every 7-10 days. Collect and burn the tops in the Fall.

USE: 2 teaspoons of PHYSAN 20 concentrate in 1 gallon of water.

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Physan 20 For Algae Control On Walkways

PHYSAN 20™ is effective at controlling algae on bricks, cement, walkways, walls, statuary, stucco, and other hardscape surfaces. PHYSAN 20 will retard algae growth for a 10-14 day period after it is applied. Reapplication every 10-14 days is recommended to prevent algae recurrence.

Mixing and application directions:
USE: 1 Tablespoon PHYSAN 20 in one gallon of water.

NOTE: PHYSAN 20 can be used to retard and prevent algae growth on soil in the presence of plants and turf. However, the dilution rates for these applications are different (and smaller) than for algae control on hard surfaces. For these rates see SEEDS/SEEDLINGS/CUT FLOWER instructions.

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