1st February 2009, 04:31 PM
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| Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist
Join Date: Jan 2007 Location: Brisbane
Posts: 12,814
|  Horticultural Myths Exposed by Dr Linda Chalker-Scott Washington State University
Linda Chalker-Scott
Here's a copy of what's on the list but go to the site to read them. Quote:
2008
Myth: Horticultural oils - Fall (Literature)
Myth: Dust mulches - Summer (Literature)
Myth: Bacillus thuringiensis (Bt) - marvel or mistake? - Spring (Literature)
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2007
Myth: Super-absorbent water crystals - are they really so "super?" - Fall (Literature)
Myth: Arborist wood chip mulches: landscape boon or bane? - Summer (Literature)
Myth: Adding Epsom salts to gardens is a safe, natural way to increase plant growth - Spring (Literature)
Myth: Compost tea: examining the science behind the claims - Winter (Literature)
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2006
Myth: Peat Moss Is an Environmentally Friendly Organic Amendment Essential for Many Horticultural Purposes - July
Myth: Milk Sprayed onto Rose Leaves Will Prevent Fungal and Bacterial Diseases - June
Myth: Vibration from Traffic Causes Soil Compaction of Adjacent Landscapes - April
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2005
Myth: Seaweed Extracts Reduce Disease, Improve Production, and Increase Stress Resistance in Landscape Plants - November
Myth: Aerobically-Brewed Compost Tea Suppresses Disease - October (also please see the EPA statement about pesticidal use of compost tea)
Myth: Recycled Rubber Mulch Is an Environmentally Friendly, Non-Toxic Choice for Landscapes - September
Myth: Unless It Causes Visible Damage, Touching or Brushing Has Little Effect on Plants - August
Myth: Certain Species Will Thrive, Lean On, Nestle With, and Support Each Other in Groupings - July
Myth: The Chemicals in Pressure-Treated Lumber Will Not Affect Adjacent Soils or Plants - June
Myth: Applying Horticultural Practices from Past Eras is a Sound Approach to Landscape Management - May
Myth: Harpin Success in the Lab Guarantees Success in the Field - April
Myth: Fertilizers Sprayed on the Leaves of Trees and Shrubs Are More Effective Than Soil Applications - March
Myth: Landscape Trees Need To Be Headed Back in the Nursery to Develop Proper Branching - February
Myth: Bleach Is the Best Choice for Disinfecting Pruning Wounds and Tools - January
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2004
Myth: Amending Your Soil with Organic Matter Will Improve Water Quality in Streams - December
Myth: Nursery Tags Are an Accurate Indicator of Final Plant Size - November
Myth: Adding Potassium or Magnesium to your Landscape Plants Will Increase Their Cold Hardiness - October
Myth: Biodynamics Is a Scientifically Sound Approach to Sustainable Management of Plant Systems - September
Myth: Nursery Brochures Are Always the Best Sources of Appropriate Planting Practices - August
Myth: Balled and Burlapped Root Balls Must Be Left Intact During Transplanting - July
Myth: Corn Gluten Meal Is an Effective Organic Herbicide - June
Myth: Add a Handful of Bone Meal to Planting Holes Before Installing Shrubs and Trees - May
Myth: Vitamin B-1 Reduces Transplant Shock by Stimulating New Root Growth - April
Myth: Are Polyacrylamide Hydrogels Environmentally Safe Substances That Reduce Irrigation Needs? - March
Myth: Unless You're a Pointsettia, Increased Light Can't Hurt - February
Myth: Adding Gypsum to your Yard or Garden Will Improve Soil Tilth and Plant Health - January
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2003
Myth: Fertilizer Injection Is the Most Effective Way to Correct Tree Nutrient Deficiencies - December
Myth: If It's Published, It Must Be True - November
Myth: Low-oxygen Root Zones Can Be Aerated by Installing Vertical Aeration Tubes - October
Myth: Tree Topping Is Like a Haircut - Sometimes It's Necessary, and a Tree Can Always Grow Out of a Bad One - September
Myth: Aerobically-brewed Compost Tea Suppresses Disease - August
Myth: Use of Drought-tolerant Plants Reduces Residential Water Consumption - July
Myth: Woodchips Made From Cedars Will Kill Landscape Plants - June
Myth: Uncomposted Yard Waste Mulch Is Harmful to Plant Life and Negatively Impacts Water Quality - May
Myth: Leaf Wilt Is the Best Indicator of Insufficient Soil Moisture - April
Myth: Healthy Soil Has High Organic Content - March
Myth: Decrease Fall Irrigation to Force Landscape Plants into Winter Dormancy - February
Myth: You Shouldn't Disturb the Rootball When Planting Trees and Shrubs - January
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2002
Myth: Uncomposted Wood Chips Can Spread Pathogenic Fungi and Bacteria to Healthy Roots - December
Myth: Glyphosate Will Move Through Root Grafts and Kill Non-target Plants - November
Myth: Botanically Derived Pesticides Are Safer Than Synthetics - October
Myth: Antitranspirants Prevent Drought Stress, Especially in Newly Installed Trees and Shrubs - September
Myth: Watering Plants on a Hot Sunny Day will Scorch Their Leaves - August
Myth: Bark Mulch and Sawdust Are Aesthetically Preferable to Wood Chips and They Work Just As Well - July
Myth: Newspaper and Cardboard Sheet Mulches Are an Excellent Ways To Reduce Weeds and Retain Soil Health in Permanent Landscapes - June
Myth: Garden Plants Do Not Become Invasive - May
Myth: If Plants Develop Red Leaves, It Means They Are Phosphorus Deficient - April
Myth: Roses Need Phosphate Fertilizer for Root and Flower Growth - March
Myth: Compost Is a Safe, Chemical-free Source of Nutrients for Gardens - February
Myth: Landscape Fabric Provides Permanent Weed Control for Ornamental Landscapes - January
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2001
Myth: Wire Baskets Will Not Interfere With Root Growth of Transplanted Trees - December
Myth: Organic Products Are Safer Than Chemicals - November
Myth: Arbor Day/Earth Day Is an Ideal Time to Install Trees - October
Myth: Native Plants Are Always the Best Choice for Environmentally Sustainable Landscaping - September
Myth: Planting Is Simple - Just Dig a Hole and Insert the Plant - August
Myth: Any Action Taken in Defense of the Environment Is Justifiable - July
Myth: Polyacrylamide Hydrogels are Environmentally Safe Substances that Reduce Irrigation Needs - June
Myth: The Quality of Plant Material Is Directly Proportional to the Price - May
Myth: Compost Tea Is an Effective Alternative to Traditional Pesticides - April
Myth: Newly Planted Trees Must Be Firmly Staked - March
Myth: Wound Dressings Protect Pruned Trees from Pathogen Damage - January
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2000
Myth: Adding Coarse Material Improves Container Drainage - December
Myth: Adding Sand Improves Clay Soil - November
Myth: Pruning the Tops of New Transplants Compensates for Root Loss - October
Myth: Phosphate Fertilizer Stimulates Root Growth upon Transplanting - September
Myth: Adding Organic Amendments Improves Soil - August
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