ACORN LAB. What is a Pest? A plant, animal, or microorganism that has a negative effect on another...
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Transcript of ACORN LAB. What is a Pest? A plant, animal, or microorganism that has a negative effect on another...
![Page 1: ACORN LAB. What is a Pest? A plant, animal, or microorganism that has a negative effect on another organism.](https://reader035.fdocuments.net/reader035/viewer/2022070403/56649f305503460f94c4ae39/html5/thumbnails/1.jpg)
ACORN LAB
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What is a Pest?
• A plant, animal, or microorganism that has a negative effect on another organism.
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Background Information
• Acorns are an important winter food for squirrels, blue jays and woodpeckers.
• Many insects feed on the nuts of North American trees, including acorns, the nuts produced by oaks.
• Some nut insects destroy so many nuts that it is difficult for trees to reproduce.
• Acorn insects play important ecological roles as food for insect-eating animals or as pioneers that hollow out acorns for other insects to use as homes.
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Common Acorn Insects
Acorn Weevil
(Snout Beetle)
Acorn Moth
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Acorn WeevilShort-Snouted Weevil
• Snout is one-half or less than its body length.
• Feed on acorns lying on the forest floor.
• Bite off bits of acorn meat from between cracks in the shells.
• Females lay eggs between cracks in the shells.
Long-Snouted Weevil
• Snout is equal to or greater than the length of its body.
• Feed on acorns still attached to oak trees.
• Can chew or drill into the shells to feed on the meat inside.
• Females lay eggs in the holes drilled into acorns during feeding.
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Acorn Moth
• Identification – forewing gray to grayish-brown with pale line
bordered distally by dark band (sometimes absent); black dots on forewing; hind wing shiny gray with dark veins and fringe of long hair-like scales
• Season – adults fly from April to September
• Food – larvae feed inside acorns and chestnuts
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Insect Larva
Acorn Weevil– short– fat– no legs– white– grub-like
Acorn Moth– long– thin– has legs– yellowish– caterpillar-like
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Larva Photos
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Acorn Weevil in Action
• http://www.natgeoeducationvideo.com/film/492/acorn-weevil
• http://www.arkive.org/acorn-weevil/curculio-glandium/video-00.html
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The Scientific Method
1. Problem/Question
2. Research
3. Hypothesis
4. Experiment
5. Conclusion
6. Report Results
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Problem / Question
• Which content; moth larva, weevil larva, mold/fungus, feces, or untouched meat will be most common in acorns?
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Research
• We will be using our prior knowledge, past experiences, and present knowledge of pests to determine which content may be the most common in acorns.
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Hypothesis
What do you expect to find most often in the acorns and why?
• Sample: Untouched meat will be the most common content inside the acorns. The acorns were collected in September before many of the adult insects began lying eggs in them.
• DO NOT START A HYPOTHESIS WITH . . . “I think”, “I predict” or “My hypothesis
is”!
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The Experiment
• Independent Variable: Acorns
• Dependent Variable: Contents
• Constants: What was kept consistent/same?– List at least 5 factors.
• Control Group: Untouched Acorns
• Experimental Group: Infested Acorns
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Other Experimental Factors
• Materials – How much? Use metric units.
• Procedure – List numerically. Be detailed.
• Results: Data Table – Used to organize data.
• Results: Graph – Used to visualize and analyze data.– Bar/column graph, line graph or pie chart
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Data Table: Characteristics of Acorns and Their Content
Data Collection
AcornDrawing &
Description ofAcorn
Length ofAcorn (cm)
Circumference of Acorn (cm)
Mass ofAcorn (g)
Float? (Yes or No)
AcornContents
1
2
3
4
5
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Data Analysis(Sample Data Table)
Acorn Contents
Moth Larva
Weevil Larva
MoldFungus
FecesUntouched
Meat
Individual % 15 8 60 33 20
Period % 18 10 54 21 45
Team % 6 2 75 15 25
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Data Analysis(Sample Graph)
What is Inside an Acorn?
01020304050607080
Acorn Contents
% O
f Aco
rns
Individual %
Period %
Team %
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Analysis & Conclusion
• Make a statement revealing whether the data collected provided support for or against the hypothesis.
• Explain the data collected including specific numerical or observational data from the experiment.
• Provide a reasonable explanation for the data and attempt to make connections based on the data collected.
• What future experiments could be done based on the data collected or how could the experiment be extended to collect more data?
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