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Name: Date: Period:

Name: Date: Period:. EWWW! Stink bugs!. LAB PREVIEW: What is a population? __________________________________________________________________ What is a population density? ___________________________________________________________.

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  1. Name: Date: Period: EWWW! Stink bugs! • LAB PREVIEW: • What is a population? __________________________________________________________________ • What is a population density? ___________________________________________________________ • PROBLEM: How can you determine the size of a population? • PROCEDURE: • Predict the number of stink bugs in the diagram to the right and record the number in the table. • Count the stink bug population a second time by sampling. A sample is made by selecting and counting only a portion of the population. Count the number of the stink bugs in the upper left square and record this number in the table. • Enter the total number of squares in the table. Multiply the number of bugs in the top left square by the total number of squares. Record this estimated total number in the table. • At the top of the table, record the amount of time it took to make the sample count. • Make a population count by placing a check mark next to each stink bug. Record the actual number of bugs in the table. Next to this number, record the amount of time it took to make the count. DATA AND OBSERVATIONS: PREDICTED NUMBER: _________ TIME: _________ Number in Total Estimated top left square X number of = total squares number _____________ X __________ = ___________ ACTUAL NUMBER: _________ TIME: _______

  2. ANALYZE: • What was the difference between PREDICTED numbers of stink bugs and ACTUAL numbers of stink bugs? _______________________________________________________________________________________________ • How many stink bugs did you estimate were shown? ____________________ • Which way was faster – making an actual count or sampling? __________________________________ • Were the results about the same? ____________________________ • CONCLUDE AND APPLY: • 5. What is the advantage of sampling a population for counting? ______________________________________________________________________________________________ • 6. What is an easy way to determine the size of a population? ______________________________________________________________________________________________________________________________________________________________________________________________ IPM Integrated Pest Management: The process of ridding a specific area of pests by limiting the use of toxic chemicals. Stink bugs have entered Lancaster County. They are an INVASIVE SPECIES and are a NUISANCE! Keeping the health of the environment in mind, we can rid ourselves of pest by using IPM methods. There are 4 various IPM methods to control pests:: Biological – Using a predator to rid the pest (i.e. Introduce a cat to get rid of a mouse population) Habitat – Careful cleaning to reduce food and hiding places, fixing leaks, sealing holes and cracks, etc. Physical – Using a vacuum cleaner, traps, fly swatters, removing pest by hand, etc. Chemical – Use of Pheromones (hormones to attract organisms), least poisonous pesticides/herbicides/fungicides YOUR JOB: Look up stink bugs and how to get rid of them by using this site: http://www.hgic.umd.edu/content/brownstinkbug.cfm and http://www.ipm.ucdavis.edu/PMG/r52301111.html. Write down the various methods to control them in the space below:

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