The document discusses various covering technologies available for high tunnel growers, including poly films, thermo reflective screens, pest screens/barriers, and hail/wind protection screens with light diffusing properties. It provides details on specific product types within each category, describing their benefits such as light transmission, durability, energy savings, pest exclusion, and protection from weather elements. Product options are presented for covering tunnels as well as row covers and frost/freeze barriers.

1. High Tunnel Coverings, Screens, &
Exclusion Materials
by Donald L. Josko, BFG
djosko@bfgsupply.com

2. What Covering Technologies Are
Available To High Tunnel Growers?
•Poly Films
•Thermo Reflective Screens
•Pest Screens/Barriers
•Hail/Wind Protection w Light Diffusing Technology
Screens

3. Types Of External Layer Poly
Clear 6 mil 4 year Film Light Diffusing 6mil Poly
Superior Light Transmission Effective Diffused Light
Excellent Strength Under High Light Transmission
Proper Conditions Excellent Thermic Properties
Excellent PAR Light

4. Internal Film IR/AC 6mil Clear Film
Bee Friendly
Condensation Resistant
Energy Savings

5. 10mil Nylon Corded Poly
3-Ply with internal nylon cords
Tear / Puncture Resistant
Cold Crack Resistance
Light Weight
Extremely Durable

6. Thermo Reflective Screens
Aluminet Energy Savings 15-45% Shade 30-70%
Cools Crops
Protects Against Frost
Use Aluminet I (Inside)

7. Pest Screen Barriers
Screen Sizing Thrip Screen
Pest Screen Size
Leafminer 0.025” (640 micron)
Melon Aphid 0.013”(340 microns)
Whitefly 0.018”(462 microns)
Western Flower Thrip
0.0075” (192 microns)

8. Bird /Bat Screens Deer Fence

9. Weed Guard OMRI Listed
*Weed Control * Conserves Moisture
*Till into the Ground in Fall
*Fertilizer Enriched 5-5-5

10. Hail/Wind/Diffused Light Screens
Chromati Net Pearl Chromati Net Red
•Significant Improvement in fruit quality and higher yields!
•Physical Protection against wind, hail, birds, and bats!
•Protects Against Sunburn and Abrasion of Crop
•Creates a Micro-Climate

11. Types Of ChromatiNet Types
Pearl Benefits
• Higher Yield s
• Heavier Plant Mass
– Increased secondary Branching
– -Beneficial for Leaf & Stem Plants
(Herbs, Leafy Vegetables)
• Better Quality
• Avable in 30,40,50,60% Shade

12. Grey Benefits
• Heavier Branching
• Higher Yield of Stems
• Use in Orchards, Vineyards,
Vegetables, Small Fruits
• Frost Protection
– Blocks Infrared (IR)radiation
• Available in:
• 30,40,50,60,70,80

13. ChromatiNet Red Benefits
• Increased Fruit size
• Improves Crop Quality
– Less Scaring
– Increased Brix (Sugar
content)
• Use in Orchards, Vineyards,
Peppers, Leafy Vegetables
Small Fruits
Available In :
30,40,50,60,70% Shade

14. Row Covers
• Dewitt
– Deluxe- .5 oz
• 4 degrees warmer Than Outside
Air
• Used for seed germination
– Deluxe Plus 1 oz
• 4-6 degrees Higher
• Used as a Growing On Product
• Insect and Mammal Barrier
• Wind & Scorch Barrier

15. Frost Barrier
• Dewitt Products
– Supreme 1.5 oz
• 6-8 degrees protection
– Ultimate 3 oz
• Up to 10 degrees protection

16. Freeze Pruf Benefits
• Quick Application
• 6-8 degrees Safety Net
• Environmentally Safe.