August 2024 - 8

PRODUCTION
Sanitizing hands and boots
throughout the day keeps
risks at bay. Photo courtesy
of Heidi Lindberg.
Nicole Gauthier,
Extension specialist in
plant pathology at the
University of Kentucky, focuses on specialty crops,
which includes fruits, vegetables, ornamentals
and hemp.
" Just like in hospitals or in our houses, we need
to keep our greenhouses clean so that we're not
spreading microbes that cause disease, " she said.
" We want to prevent the movement of pathogens
and propagules. "
For basic cleaning, she noted things such as washing
pots, removing debris and not moving dirty water
from block to block are important. She recommends
starting with simple cleaning using water and soap and
then going into sanitizing or disinfecting.
Gretel Adams, co-owner and operations orchestrator
of Sunny Meadows Flower Farm in Columbus, Ohio, said
while crops are growing, the team keeps weeds out so
they don't harbor disease.
" We rip out or till in a crop when it is finished, making
sure to remove any weeds in the bed as well, " she said.
" Then in the winter, we steam our soil, which is more of an
advanced grower technique, but helped us with disease
buildup in the soil from years of using the same ground
beds. Afterwards, we add beneficial bacteria back to the
soil with either TerraGrow or RootShield. "
CHEMICALS AND CLEANING AGENTS
There are various choices of sanitizing agents including
ethanol, bleach, quaternary ammonium, hydrogen dioxide
and chlorine dioxide.
" Bleach is highly effective against fungi, bacteria and
some viruses, but it is highly corrosive and needs to be
rinsed, " Lindberg said. " Quaternary ammonia products
are more effective and not as corrosive, so it can be
applied to more surfaces, and has a lower application
time. Many growers I talk to use KleenGrow (quaternary
ammonia) to clean greenhouses and sulphuric acid
products such as Strip-It (sulfuric acid solution) to shock
irrigation lines and reduce mineral buildup and biofilm. "
8
AUGUST 2024 GPNMAG.COM
FEBRUARY 2024 GPNMAG.COM
We need to keep our
greenhouses clean so
that we're not spreading
microbes that cause
disease. We want to prevent
movement of pathogens
and propagules.
- Nicole Gauthier
Gauthier noted the quaternary ammonia compounds
are highly effective against bacteria, fungi, viruses, as
well as algae.
" You can use them on walls, floors and tables; you can
use them to clean containers and tools; to run through
your irrigation lines; and even on the cooling pads in
the greenhouse, " she said. " You wouldn't use them on
anything porous like wood, because they are not as
effective. "
Sunny Meadows Flower Farm sanitizes the houses once
a year by spraying the plastic, wood and black woven

http://www.GPNMAG.COM http://www.GPNMAG.COM

August 2024

Table of Contents for the Digital Edition of August 2024

Table of Contents
Editor's Report | Are you controlling?
Production | Savvy sanitation protocols
Variety Information | A need for natives
Editors' Picks | Green goods: Editors' picks from Cultivate'24
CEA | LED lighting
Great Lakes EXPO | Gearing up for EXPO 2024
Forty Under 40 Perspectives | Inventory management in the nursery
Culture Report | Roselilies
Technically Speaking | Extended photosynthetically active radiation
SGAFT | Geometry: Small greenhouse surface area distribution
AmericanHort | Plug & Cutting: Focused on young plants
Product Marketplace
Industry News
Events
Classifieds/Ad Index
August 2024 - Table of Contents
August 2024 - 2
August 2024 - 3
August 2024 - Editor's Report | Are you controlling?
August 2024 - 5
August 2024 - Production | Savvy sanitation protocols
August 2024 - 7
August 2024 - 8
August 2024 - 9
August 2024 - 10
August 2024 - 11
August 2024 - Variety Information | A need for natives
August 2024 - 13
August 2024 - Editors' Picks | Green goods: Editors' picks from Cultivate'24
August 2024 - 15
August 2024 - CEA | LED lighting
August 2024 - 17
August 2024 - 18
August 2024 - 19
August 2024 - 20
August 2024 - 21
August 2024 - 22
August 2024 - 23
August 2024 - Great Lakes EXPO | Gearing up for EXPO 2024
August 2024 - 25
August 2024 - Forty Under 40 Perspectives | Inventory management in the nursery
August 2024 - 27
August 2024 - Culture Report | Roselilies
August 2024 - 29
August 2024 - 30
August 2024 - 31
August 2024 - Technically Speaking | Extended photosynthetically active radiation
August 2024 - 33
August 2024 - 34
August 2024 - 35
August 2024 - SGAFT | Geometry: Small greenhouse surface area distribution
August 2024 - 37
August 2024 - 38
August 2024 - 39
August 2024 - AmericanHort | Plug & Cutting: Focused on young plants
August 2024 - 41
August 2024 - Product Marketplace
August 2024 - 43
August 2024 - 44
August 2024 - 45
August 2024 - Industry News
August 2024 - 47
August 2024 - Events
August 2024 - 49
August 2024 - Classifieds/Ad Index
August 2024 - 51
August 2024 - 52
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https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2022
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https://www.nxtbook.com/greatamericanmediaservices/GPN/cannabisguide-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/hempguide-2022
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https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/june-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/may-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/april-2020
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https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-march-2020
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