July-August - 17

ORGANIC GROWER: RESEARCH
OUR RESEARCH CLEARLY DEMONSTRATED THAT
SINGLE-LAYER PLASTIC COVER SHOULD BE USED
FOR EARLY HARVEST OF TOMATO, BELL PEPPER
AND EGGPLANT IN AN ORGANIC SETTING OR
ORGANIC-MANAGED SETTING.
- SANJUN GU, EXTENSION SPECIALIST AND
ASSOCIATE PROFESSOR OF HORTICULTURE AT
VIRGINIA STATE UNIVERSITY
Double-layer high tunnels have advantages over
single-layer high tunnels in areas of heavy snow and
high winds, and growers must consider their specific
location, Gu said.
Trials
The trial was done with four 30-foot- x 96-foot-high
tunnels, two with a single layer and two with a double
layer plastic cover. Olympus, a red pepper; and Sweet
Sunrise, an orange pepper, were planted in one baresoil
bed and one plastic mulched bed. Researchers
applied three replications of each cultivar with eight
plants in a replication.
The total and marketable yield were significantly
higher in the single layer than in the double layer
tunnels (31.3 pounds and 24.5 pounds vs. 25 pounds
and 21 pounds per plant) in 2021. In 2022, Gu saw no
significant difference, with 41.7 and 42.1 vs 27.3 and
32.4 pounds per plant.
The yields in early months (June and July) were higher
in the single layers than in the double layers, though
Virginia State University researchers studied if singleor
double layer high tunnel plastic adequately covered
warm season vegetables in North Carolina.
ORGANICGROWER.INFO | 17

http://www.ORGANICGROWER.INFO

July-August

Table of Contents for the Digital Edition of July-August

Editor's Letter
Grower Profile: Central Florida leafy greens
GLVPN Veg Connection: Vegetable crop yields
Organic Grower
Ag Tech: Fields of drones
Plant & Soil Health: Fusarium wilt
Great Lakes EXPO News: Connecting growers through the digital market space
Farm Market & Agritourism: Agreements between growers provide additional opportunities
Ag Labor Review
Classifieds
Advertiser Index
July-August - 1
July-August - 2
July-August - 3
July-August - Editor's Letter
July-August - 5
July-August - Grower Profile: Central Florida leafy greens
July-August - 7
July-August - 8
July-August - 9
July-August - GLVPN Veg Connection: Vegetable crop yields
July-August - 11
July-August - 12
July-August - 13
July-August - 14
July-August - Organic Grower
July-August - 16
July-August - 17
July-August - 18
July-August - 19
July-August - 20
July-August - 21
July-August - 22
July-August - 23
July-August - 24
July-August - 25
July-August - 26
July-August - 27
July-August - 28
July-August - Ag Tech: Fields of drones
July-August - 30
July-August - 31
July-August - Plant & Soil Health: Fusarium wilt
July-August - 33
July-August - 34
July-August - 35
July-August - Great Lakes EXPO News: Connecting growers through the digital market space
July-August - 37
July-August - Farm Market & Agritourism: Agreements between growers provide additional opportunities
July-August - 39
July-August - Ag Labor Review
July-August - 41
July-August - Classifieds
July-August - Advertiser Index
July-August - 44
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