1. If already
teaching a unit about insects, devote one class session to discussing
"pests."
2. Begin by asking students to list insects that live in this area
that might affect the ecology or economy. Write the names on the
board. Ask students whether the effect of these insects may be -
can the insect have a positive impact by spreading pollen, for example,
or is the insect capable of killing plants? Possibly students will
mention the Glassy-Winged Sharpshooter, if they've heard about it.
3. If students do not bring up the GWSS, write it on the board,
and ask students if they've heard about it. Tell them that today
you're going to discuss the GWSS, since it's an insect that is already
having an important impact on the state's ecology.
4. Ask the students if they know what the GWSS is, and if they've
ever seen one. If they say they have, ask them how big
it is, what color, etc. Write their ideas on the board.
5. Compare their ideas with the real thing. Show them a large photo,
or pass out the vial with the insect in it.
B. What does
the Glassy-Winged Sharpshooter do?
1.
Ask the students what they think the insect does, based on what it
looks like. Write down their ideas.
2. Now is a good time to show the video, or the PowerPoint presentation
depending on what's best for your classroom.
3. After it's over, ask the students to explain what the insect does.
Make sure to focus on impacts that directly affect them and that they
can easily understand. Tell them that there are two ways in which
GWSS can potentially harm plants.
a. W hen the
GWSS feeds, it sucks huge amounts of liquid out of plants. Explain
that GWSS drinks 13 milliliters of water every day, or about 200-300
times its body weight - the equivalent of a human being drinking
4,300 gallons of water every day! An infested citrus orchard in
Southern California needed an increase in water irrigation of 25%
-- that's a lot of water. If you have access to the video, this
is a great time to talk about Sharpshooter rain, the liquid the
insect excretes while it's feeding, that leaves white stains on
plants, sidewalks, cars or anything else outside. If you can't show
this process in action, show them photographs of the white stains
on fruit and leaves.
b. Read a list of plants that are affected by diseases the insect
carries (almonds, alfalfa, citrus, oleander, grapes, etc. - a full
list in available on www.bugspot.org).
Ask students to imagine what they'd miss about these plants (no
more fruit salad, almond Hershey bars, etc.).
C. How can
we stop the insect from spreading?
1. Talk about
the inspection program -- how inspectors are carefully inspecting
plant material that comes into the county. The video shows how biologists
turn leaves upside down to inspect them - if possible, demonstrate
this. Show pictures of an egg mass - this is what they are usually
looking for. You can even invite a County inspector to visit your
classroom.
1. Give everyone
a "sharpshooter kit" in a plastic baggie (we provide these)
to capture suspicious insects, flagging tape to tie on plants, a
single-panel brochure, a magnifying glass, a sticker, and a 3-D
magnet with a picture of the insect.
2. Take the students out to a nearby park or recreation area, or
even the playground, to use their GWSS kits. Instruct them to look
at leaves and plants - hopefully they won't find anything, but it's
fun to look. You can have them look for other interesting plant
and insect specimens to share with their classmates. Tell them it's
okay to bring back insects, and it may be possible to bring back
some plants that they find interesting, to share with the group,
but not trash such as cigarette butts, animal droppings, etc. Reiterate
that they should try to treat all insects gently. They should use
the flagging tape in the kits to mark each area from which they
remove a specimen, so that they can return it later.
3. After this "Sharpshooter spotting" expedition, bring
the students back into a circle or the classroom to share their
findings. Have them talk about the impact these bugs may have on
plants. If anyone thinks they've found a Sharpshooter, compare the
insect to the pictures, and have the students explain why the insect
is or isn't a Sharpshooter. If it looks like it could be one, call
the hotline, 1-866-BUG-SPOT,
right away. Explain that you're in a classroom situation, and see
if a biologist can come and inspect your specimen immediately.
4. After the presentations, have the students return their specimens
to where they found them. Encourage them to take their Sharpshooter
kits home, inspect their yards and neighborhood parks, and share
the information they have learned with family members and neighbors.
5. End the unit by reviewing the important questions - what does
the insect look like, and what does it do?
1. If your
school has a lab facility, this is another opportunity to expand the
unit. Contact your local Agricultural Commissioner or University of
California campus about having someone speak to students or acquiring
samples that can be viewed under a microscope - GWSS, egg masses,
or Sharpshooter rain. Depending on what stage current research is
at when you contact them, they may have other ideas about ways in
which students can learn about the insect.
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