Unit12 - Unit 12 in Entomology [1] From agriculture to...

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Unit 12 in Entomology [1] From agriculture to urban pest management, there's a whole realm of opportunities out there to control pests. Unit 12: insect pest management. [2] The objectives of this unit are to define the term pest and discuss its subjectiveness, describe two categories of pests, differentiate between exponential and logistic growth, differentiate between K and R strategists, define economic injury level, economic threshold, and characteristic abundance, and also to define pest resurgence and secondary pests and explain how they can be caused by pesticide use. Be sure to complete your textbook readings and fill out your study guide as you progress through this unit. [3] 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 can destroy our homes. Can you think of any other group of organisms that can even come close to having that kind of impact? In this unit we’ll begin our examination of insects as pests and how we combat them. For your next journal assignment I would like for you to briefly define pest. So what is a pest? Take a minute to answer this question and record your answer in your journal. [4] Now you’ve had a chance to think about what a pest is, let's look at the question more closely. The answers that students often give when asked what an insect pest is is usually something 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 just 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. [5] 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 there 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. However, most people in our
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Unit12 - Unit 12 in Entomology [1] From agriculture to...

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