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Pesticides, Good or Bad? Full Project

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by

Kira Goya

on 15 February 2013

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Transcript of Pesticides, Good or Bad? Full Project

Pesticides, Good Or Bad? Kira Goya Pesticides Does pesticides only get rid of bugs and pests on your plants? Or does is negatively affect your plants growth in a negative way? What Are Pesticides? A substance or mixture of substances with the purpose of preventing,destroying, or repelling any pest (EPA) What is Inside a Pesticides Product? Active and inert ingredients:
contaminates & impurities:
Dioxin
DDT
Metabolites
5% active ingredient & 95% inert ingredients. There Is Another Way To Get Rid of Your Pests On You Plants Besides Toxic Pesticides! A Soap And Water Solution How Does Soap Get Rid Of Pests? Disrupts the cell membranes of insects
Removes protective waxes on an insect, causing death through excess loss of water Plant Injury With The Use Of Soap And Water: Frequent application may damage leaves
High concentration may cause phytotoxicitity How Can We Prevent This? A diluted solution
Washing leaves after application Application: Short intervals (4 to 7 days)
Thorough, completely wet the pest, underside of the leaf, and other protective sites. Hypothesis:
If I test whether commercial pesticides or a soap and water solution has more positive affect on plant growth, then the water and soap concentration will have a better affect on plant growth because soap and water is able to get rid of pests by disrupting their cell membranes and/or removing protective waxes, which causes death through excess loss of water, while commercial pesticides uses toxins that could negatively harm the plant as well as humans around. Materials
Pots (1 1/2 gal.) x9
Potting Soil (Miricle-Gro Potting Mix) - 2 bags
1 Bottle of Dish Washing Soap (Dawn)
1 Bottle of Commercial Pesticides
Cherry Tomato Seeds (Seeds of Change)
Spray Bottle (8 oz.) x2
Tags x45
Spade
Watering Can
Measuring Cup
Paper Towel - 1 roll
Sharpie
Ruler
Camera #1 #3 Fill each pot with potting soil, using the spade, until the soil reaches 1" from the top. Make sure to lightly pack the soil. #2 Using your finger, create 5 holes 1/4" deep and roughly 1" apart. #4 Take your Cherry Tomato seeds and in each hole, place one seed. #5 Then cover the seeds with extra potting soil. #6 #8 Take the measuring cup and water each plant with 8 oz. or 1 cup of water. Make sure the water is uncontaminated. Place the plants in an environment that is free of rough wind and where each pot receives the same amount of shade and sunlight. #7 To create the soap and water concentration, fill the 8 oz. spray bottle with water and add a squirt of dishwashing soap in the spray bottle and mix/shake the concentration. (Make more as needed) #9 Take another 8 oz. spray bottle and fill it with the commercial pesticides. (Follow the instructions provided) #10 Before you start to apply the pesticides, wait until the 3rd week of measuring to apply the soap and water concentration and the commercial pesticides. #11 #13 Apply the soap and water concentration and the pesticides after you measure and collect your data. When applying the soap and water, squirt the under sides of the leaves of each plant. #12 When applying the commercial pesticides, also squirt the under sides of the leaves of the plants. #14 Reapply the commercial soap and water concentration and the commercial pesticides every week on each Wednesday, at around 3:30 pm. #15 When collecting data and applying the soap and water concentration or the pesticides, measure and apply every Wednesday, around 3:30 pm. #16 #18 Water each pot with 8 oz. of water every other day. #17 After every week, measure each plant with a ruler starting at the soil line, measuring the plants height in centimeters. #19 Record all of this information in a notebook or on a data sheet and the time you collected your data. #20 Procedures Complete steps 19 & 20 for all 45 plants #21 #23 Each time you collect you data; use the camera to take a picture of each plant and the weather conditions of that day. After you measure and/or water the plants, make sure to clean up your area and neatly put away your supplies for the next usage. #22 Continue to measure your plants for 10 weeks. #24 When you're done gathering your information for this experiment, you can choose to harvest the tomatoes and share them with someone, or you can continue to do this experiment further. #25 Find a clear space where this experiment can be conducted. Obtain 9 1 1/2-gallon pots
Label 3 pots "Soap and Water", 3 pots "Control Group", and 3 pots "Commercial Pesticides" with a sharpie.
Take the tags and label each plant "Soap and Water: Plant #1", "Soap and Water: Plant #2" . . . and so on. Make sure to include the date in which the plants were planted. Before you reapply the pesticides and the soap and water concentration, take a wet paper towel to remove any traces of the pesticides or soap and water from the previous application. Data Control Group Soap and Water Commercial Pesticides Conclusion Was My Hypothesis Correct? Yes! Soap and Water vs. Pesticides However... the difference in the average growth per week was very small. Average Growth Per Week: Control Group: 4.82 cm
Soap and Water: 4.82 cm
Commercial Pesticides: 3.86 cm Errors: uneven application of soap and water solution and pesticides.
Plants not receiving the same amount of sunlight and shade.
Does Commercial Pesticides affect Plant Growth? No Yes Work Cited Cranshaw, W.S. "Insect Control: Soaps and Detergents". Colorado State University. 3 August, 2012. July 27, 2012. <http://www.ext.colostate.edu/pubs/insect/05547.html/>"Ecological Risk Assessments." Pesticides: Environmental Effects. May 9, 2012. 20 August, 2012. <http://www.epa.gov/opp00001/ecosystem/ecorisk.htm>Huff, James. "Stop Pesticides: Bugs Are Better." 20 August, 2012 <http://www.ibiblio.org/prism/apr98/bugs.html>Naeve, Linda. "Wash Away Houseplant Pests with Insecticidal Soap." Iowa State University Extension: Extension News. March 6, 2006. August 20, 2012. <http://www.extension.iastate.edu/newsrel/2003/mar02/mar0302.html>"What Is a Pesticide?" Beyond Pesticides: Protecting Health and the Environment Science, Policy and Action. 20 August, 201. <http://www.beyondpesticides.org/gateway/whatisapesticide.htm> Thank You For Watching!
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