notes12 - Insect Pest Management Objectives 1. 2. 3. 4. 5....

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1 1 Insect Pest Management 2 Objectives Read textbook pages 396-404 1. Define the term "Pest" and discuss how it is subjective. 2. Describe two categories of pests. 3. Differentiate between exponential and logistic growth. 4. Differentiate between K and r strategists. 5. Define EIL, ET and Characteristic Abundance. 6. Define Pest Resurgence and Secondary Pests and explain how they can be caused by pesticide use. 3 Introduction Insects have a greater impact on humans than any other animals. They are our biggest competitors for food resources, they spread disease, and they even destroy our homes. Can you think of any other group of organisms that would even come close to having the kind of impact insects have? In this unit we will begin our examination of insects as pests and how we combat them. ASSIGNMENT Lets start this unit by having you answer a seemingly straight forward question: " What is a pest? " Take a minute to answer this question and record your answer in your journal. Bean weevil UF ASSIGNMENT 4 What is a Pest? Now that you have had a chance to think about what a pest is, let's look at the question more closely. The answers students often give when asked what an insect pest is usually an answer like: "A pest is something that damages crops." or "A pest is something that bothers us.“ These are both correct answers. A good definition of a pest that includes both of these thoughts is " a species that interferes with human welfare or aesthetics ." This definition takes into account both of the student responses above by recognizing that pests not only impact our welfare by eating our food, destroying our houses, or spreading disease, but can also simply bother us. For example, a cockroach running across your kitchen counter may not harm you directly but it does affect you mental welfare and aesthetics of your home. An insect eating your rosebush may not impact your personal welfare but it may cause enough aesthetic damage to be considered a pest. Subjectivity This leads us to an important point. Real damage caused by insects such as mosquitoes transmitting disease, caterpillars eating a tomato plant, or beetles killing a tree is relatively easy to quantify. However, aesthetic or cosmetic damage is much more subjective. What is unacceptable to one person may be of no consequence to another. For example, some people may feel a single ant walking through their kitchen is unacceptable and take action while others may assume that their is no problem until their pizza is being carried out the door by a colony of ants . This subjectiveness regarding pests can even extend to pests that are causing real damage. Some people are willing to put up with a worm hole in their apple in order to have food that is produced without pesticides.
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notes12 - Insect Pest Management Objectives 1. 2. 3. 4. 5....

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