July 2023 - 20

BERRIES
Applications were conducted in
spring, summer and fall (except
in apple).
Chaudhari's preliminary
conclusion was that crop safety
was similar from VGS and using
a backpack sprayer (BPS). In
blueberries, less than 5% crop
injury was reported regardless
of the method of application and
herbicide treatments.
Weed control efficacy with VGS
(WEED-IT Quadro) is similar or
higher compared to standard
banded BPS.
VGS used constantly higher
sprayer volume (increased
herbicide use) compared to BPS
regardless of weed density or
production systems.
A WEED-IT Quadro herbicide sprayer
attached to an ATV at the Michigan State
University campus research farm. Photo
courtesy of Sushila Chaudhari, Michigan
State University.
" The WEED-IT Quadro's weed control efficacy was
similar to or higher than the backpack sprayer's, " she said.
" The take-home message on this is that the backpack
sprayer consistently used less spray volume as compared
to the vision-guided sprayer, " she said.
The reasons behind using the
higher volume with the visionguided
sprayer involved the
settings that the researchers used.
" A higher sensitive nozzle
setting on the vision-guided
sprayer may have been detecting
a small chlorophyll and using
more spraying, " she said. " The
detection zone is very wide at 25
centimeters. If the sensing unit
is detecting a small amount of
chlorophyll on a small weed, it's
going to get detected and sprayed.
We think these are the reasons the
vision-guided system has
used more spray than the
backpack sprayer. "
Chaudhari's work will lead to
further evaluation of the Quadro's settings and their
effect on weed control and herbicide volume.
The project was funded by the Michigan State
Horticultural Society, Michigan Blueberry Growers, the
Michigan Apple Committee and the U.S. Department of
Agriculture's National Institute of Food and Agriculture.
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July 2023

Table of Contents for the Digital Edition of July 2023

Editor's Letter
Pest Control: The nose knows
Ag Tech: Drone deployment
Cover Story: Keeping it fresh
Irrigation & Water Management: Stressed out
Berries: Pinpoint precision
Plant & Soil Health: What's good for the gooseberry ...
CA Storage: Keeping control
Farm Market & Agritourism: Agreements between growers provide opportunities
CMI
Ag Labor Review
Classifieds
Advertiser Index
July 2023 - 1
July 2023 - 2
July 2023 - 3
July 2023 - Editor's Letter
July 2023 - 5
July 2023 - Pest Control: The nose knows
July 2023 - 7
July 2023 - 8
July 2023 - 9
July 2023 - Ag Tech: Drone deployment
July 2023 - 11
July 2023 - 12
July 2023 - 13
July 2023 - Cover Story: Keeping it fresh
July 2023 - 15
July 2023 - Irrigation & Water Management: Stressed out
July 2023 - 17
July 2023 - Berries: Pinpoint precision
July 2023 - 19
July 2023 - 20
July 2023 - 21
July 2023 - Plant & Soil Health: What's good for the gooseberry ...
July 2023 - 23
July 2023 - CA Storage: Keeping control
July 2023 - 25
July 2023 - Farm Market & Agritourism: Agreements between growers provide opportunities
July 2023 - 27
July 2023 - CMI
July 2023 - 29
July 2023 - Ag Labor Review
July 2023 - 31
July 2023 - Classifieds
July 2023 - 33
July 2023 - Advertiser Index
July 2023 - 35
July 2023 - 36
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