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3._Loosestrife_Life_Cycle

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Published on December 18, 2008

Author: aSGuest7085

Source: authorstream.com

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Slide 1: Lessoning Loosestrife Purple loosestrife is easy to identify when in blossom. Slide 2: Lessoning Loosestrife Winter Spring Can you identify it in other seasons? Summer Fall Slide 3: Lessoning Loosestrife Can you identify it in other seasons? Which one is purple loosestrife? Slide 4: Lessoning Loosestrife Can you identify it in other seasons? Which one is purple loosestrife? Slide 5: Lessoning Loosestrife What part of the plant produces the seed? Do you think Purple loosestrife grows taller every year, or dies back and grows up again? What part of the plant continues living in the winter? Slide 6: Lessoning Loosestrife What part of the plant produces the seed? The job of flowers is to produce seeds. Does Purple loosestrife grow taller every year like a bush, or die back and grows up again from the roots ? Dies back. Plant grows up from stored energy in roots. What part of the plant continues living in the winter? The roots. Slide 7: Lessoning Loosestrife This is life cycle model for Phragmites, another invasive plant. Challenge: Observe purple loosestrife through the year and create a life cycle timeline for purple loosestrife Slide 8: Lessoning Loosestrife Winter Spring Old dead stalks remain New Growth. Seeds sprout & grow. Summer, Flowers bloom Fall: Flowers go to seed. Slide 9: Lessoning Loosestrife dormant germination vegetation growth flowering and seed set Food in roots and seeds shed Make a prediction: When does your purple loosestrife growing season begin and end in your town? Read background information to help you with this. Observe to see what happens. Slide 10: Lessoning Loosestrife dormant germination vegetation growth flowering and seed set Food in roots and seeds shed Make a prediction: When does your purple loosestrife growing season begin and end in your town? Observe to see what happens. Here’s a guess. Does your prediction look like this? Slide 11: Lessoning Loosestrife Winter Spring Old dead stalks remain New Growth. Seeds sprout and grow. Summer, Flowers bloom Observe to see what really happens at your site. Take photos each season to record. ) Slide 12: Lessoning Loosestrife Figure 3. Lifecycle of Galerucella calmariensis and G. pusilla. Solid colored bars represent the length of activity for each of the life stages. Short patterned bars for the upper three stages represent potential second generation activity. Slide 13: Lessoning Loosestrife Compare the life cycle of the Galerucella beetles and the purple loosestrife. Why do you think this plant is a good match for the beetles?

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