June 2024 - 41

DUETS
advisors taught growers to " test - don't guess " about
plant nutrition. Guessing incorrectly escalated symptom
expression, delayed corrective response and jeopardized
crop salability.
Today, we have handheld meters that are indispensable
in a grower's nutrition monitoring. What's your position
regarding remote diagnostic technology and what growers
can do on site versus using a plant pathology lab?
Margery: Do growers need to test when they see
potential disease symptoms, and do growers have
technology now that helps them to do it themselves? Of
course I agree with your advisors, that knowing is far
better than guessing. It's pointless to spray fungicides
on bacteria or viruses. Plus growers often think they have
made a cultural error when there is actually a pathogen
that is messing up their crop, and vice versa.
I immediately think of impatiens necrotic spot and
tomato spotted wilt when I think about new technology
and diseases. These two viruses were a bewilderment
when they first came on the scene: different symptoms on
different crops, different symptoms on different ages of
the same crop, different symptoms on different cultivars.
A lot of visual education was needed from extension
pathologists.
But then Agdia began developing do-it-yourself
test kits that growers could afford and easily use, and
the final diagnosis no longer had to be guesswork or
formally executed in a laboratory. Other companies have
followed suit with similar products, and today we can
test for some bacteria, some fungi, Phytophthora and
many viruses with what are called lateral-flow devices.
Technology took on a key IPM support role and allowed
on-site diagnosis of a widespread, hard-to-identify and
significant disease problem. This solved the need for
information but didn't solve the need for advice. And
laboratory testing is still essential for some businesses
and for the detection of unanticipated problems.
Peter: What do you think of apps for disease ID?
Margery: I confess that I laughed when an
entrepreneur proposed to me that he would gather
enough photographs to create a tool that growers could
use to diagnose diseases. I thought such methods
could never replace a good diagnostician. But now I
use Cornell Lab of Ornithology's Merlin Bird ID program
to listen to birds and tell me which one is singing. It's
magical! Given properly screened inputs, this kind of
approach will eventually surpass most people's ability
to sight-identify a disease. Today, we can even get DNA
sequences of pathogens to find out what they really are.
This kind of thing won't replace the need for those
who are talented at problem analysis, who understand
plant production systems, the crops and the possible
pathogens. But there is certainly an information
revolution going on. I would hate to go back to the time
before digital photography, emails and ImmunoStrips! I
staunchly believe in truthing conclusions with laboratory
cultures and pathogenicity trials, though. New crop
enemies, which emerge every year, can never get
identified if we assume that the problem before us has
been known about for years.
Peter: Thank you " Princess Mildew " (a.k.a Floriculture
Royalty) for sharing your awesome insights.
Peter Konjoian is president of Konjoian's Horticulture Education
Services Inc. His career spans four decades as a commercial
grower, researcher and consultant. Konjoian can be reached at
peterkfes@comcast.net.
Margery Daughtrey, Ph.D., is senior Extension associate at
Cornell University's Long Island Horticultural Research and
Extension Center in Riverhead, New York.
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GREENHOUSE PRODUCT NEWS 41
http://www.a-vinternational.com

June 2024

Table of Contents for the Digital Edition of June 2024

Table of Contents
Editor's Report | Labor updates
Legislation | Tackling ag labor
Management | All-in-one installation
Labor | Labor survey report
Labor | New H-2A worker protections will start this year
CAST 2024 | CAST crazes of 2024
Pest & Disease Management | Start clean, stay clean
Biologicals | Plant health and biologicals
Dr. Bugs | Biological control agent of Western flower thrips
Forty Under 40 Perspectives | Remote Sales success
Culture Report | Sparkling new Princettia varieties
Duets | Plant pathology perspective from floriculture royalty
AmericanHort | Dive deeper and gain an edge
Product Marketplace
Industry News
Classifieds/Ad Index
June 2024 - 1
June 2024 - 2
June 2024 - Table of Contents
June 2024 - Editor's Report | Labor updates
June 2024 - 5
June 2024 - 6
June 2024 - 7
June 2024 - Legislation | Tackling ag labor
June 2024 - 9
June 2024 - Management | All-in-one installation
June 2024 - 11
June 2024 - 12
June 2024 - 13
June 2024 - Labor | Labor survey report
June 2024 - 15
June 2024 - Labor | New H-2A worker protections will start this year
June 2024 - 17
June 2024 - CAST 2024 | CAST crazes of 2024
June 2024 - 19
June 2024 - 20
June 2024 - 21
June 2024 - 22
June 2024 - 23
June 2024 - Pest & Disease Management | Start clean, stay clean
June 2024 - 25
June 2024 - Biologicals | Plant health and biologicals
June 2024 - 27
June 2024 - 28
June 2024 - 29
June 2024 - Dr. Bugs | Biological control agent of Western flower thrips
June 2024 - 31
June 2024 - Forty Under 40 Perspectives | Remote Sales success
June 2024 - 33
June 2024 - Culture Report | Sparkling new Princettia varieties
June 2024 - 35
June 2024 - 36
June 2024 - 37
June 2024 - Duets | Plant pathology perspective from floriculture royalty
June 2024 - 39
June 2024 - 40
June 2024 - 41
June 2024 - AmericanHort | Dive deeper and gain an edge
June 2024 - 43
June 2024 - Product Marketplace
June 2024 - 45
June 2024 - 46
June 2024 - 47
June 2024 - Industry News
June 2024 - 49
June 2024 - Classifieds/Ad Index
June 2024 - 51
June 2024 - 52
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https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/june-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/may-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-april-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/april-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/february-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/cannabisguide-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/hempguide-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/newvarieties-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-january-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/january-2022
https://www.nxtbook.com/greatamericanmediaservices/GPN/december-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-november-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/november-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/october-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-september-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/september-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/august-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-july-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/july-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/june-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/may-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/april-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-march-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/march-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/february-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/cannabisguide-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/hempguide-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/newvarieties-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-january-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/january-2021
https://www.nxtbook.com/greatamericanmediaservices/GPN/december-2020
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https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-september-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/september-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/august-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-july-2020
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
https://www.nxtbook.com/greatamericanmediaservices/GPN/californiaspringtrials-2020
https://www.nxtbook.com/greatamericanmediaservices/GPN/big-grower-march-2020
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https://www.nxtbook.com/greatamericanmediaservices/GPN/cannabisguide-2020
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