October 2023 - 23

GREAT LAKES EXPO
During the Great Lakes EXPO, Jandiric will walk
through an IPM program titled " A systems approach to
greenhouse biological control, " and will discuss a key
pest of ornamentals - western flower thrips - from
start to finish.
" This program has been highly successful in Canada.
Over 90% of our growers almost exclusively use
biocontrol in Ontario. Most of this is driven by the need to
control western flower thrips in an effective, reliable and
economical way, " Jandricic said. " Pesticides just weren't
working for us and growers don't enjoy using them.
Developing this program over the last two decades has
helped growers get off the pesticide treadmill. "
Jandricic's session, she will explain how biocontrol
best works by starting as clean as possible and dipping
cuttings in reduced-risk pesticides such as soap and oil.
" By reducing pest pressure at the beginning, you set
your natural enemies up for success and may need fewer
of them, " she said. " We then use different approaches in
propagation versus production, as these environments
can be quite different. What works in one might be
unnecessary or too costly in the other. Best practices
for biological control also involve monitoring pest levels
throughout the crop to know if you need to add in other
biocontrols or other IPM strategies. "
According to Jandricic, with biocontrol, it's important to
incorporate other non-chemical IPM strategies so growers
can have a well-rounded, resilient management program.
" I love sticky tape and mass-trapping cards! A lot of
growers seem to avoid using them because they are afraid
they will trap and kill too many of their natural enemies,
Jandricic said. " This is a valid concern, but in practice, we
don't see this. And, the traps can help reduce incoming pests,
meaning your biocontrol agents can keep up with them. "
Ultimately, Jandricic is a major advocate for biological
control and encourages growers to implement the practice
within their pest management programs.
" That biological control is fun. Growers in Ontario love
talking about their biocontrol control programs, watching
the biocontrol agents work and comparing notes with
other growers. Nothing beats a clean, high-quality crop at
the end of the crop cycle where you don't have to put on a
spray suit. "
Learn more about these sessions and others at
glexpo.com. The 2023 Great Lakes EXPO will be held
Dec. 5-7 at DeVos Place in Grand Rapids, Michigan.
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October 2023

Table of Contents for the Digital Edition of October 2023
