entmlgy5800_final_worksheet

docx

School

Ohio State University *

*We aren’t endorsed by this school

Course

5800

Subject

Chemistry

Date

Jan 9, 2024

Type

docx

Pages

Uploaded by AdmiralFerretPerson107

ENTMLGY 5800: FINAL WORKSHEET Your name _______________________________ Directions: this is an open-internet, open-book, open-notes worksheet, but you must work independently and not discuss the questions, answers, or procedures with any people inside or outside of the class. Part 1: Please show your ability to navigate through pesticide labels and other public information by finding the information requested below. The subject is fungicides used on pumpkins for powdery mildew control in the U.S.A. Note that pumpkins are part of the CUCURBIT crop group. Complete the cells in the table below. To earn full credit, be sure to provide UNITS for any number that you provide. 13 boxes x 2 columns, each 1 point = 26 points, plus 1 point for column of sources. Then answer the questions on page 2, related to values in the table on page 1. Item Fungicides Please note your general source of info (abbreviations ok) (1 point for whole column) Fontelis (1 point per box) Bravo Weather Stik (1 point per box) Common name of active ingredient? Penthiopyrad Percentage of active ingredient? 20.4 % Amount (weight) of a.i. per gallon? 1.67 lbs a.i. per gallon Re-entry interval? 12 hrs Pre-harvest interval? 1 day Rate of product per acre, per application: minimum and maximum? FRAC mode of action group number? Acute mammalian oral LD 50 ? >2000 mg kg^-1 Environmental Impact Quotient, total (also called reference value), using maximum rate of product (see EIQ Table 2 if not in Calculator app) 26.75 Octanol/water partition coefficient at 20 o C, pH 7 (Log K ow ) 4.62 Solubility in water (at 20 o C) 1.375 mgl ^-1 Bioconcentration factor 186 1kg ^-1 Toxicity to honey bees by contact (acute 48-hour topical LD 50 ) >500 Did you remember to include units for all values?

Part 2 : Interpretation of values in Table on page 1. (8 questions, each 2 points = 16 points) Question Your answer 1. Which fungicide is more toxic to mammals by ingestion? 2. Based on the total EIQ, which fungicide is less harmful to the environment? 3. Which fungicide is less harmful to honey bees? 4. Which fungicide is best to use on the day of harvest? 5. Which fungicide is most likely to move with water? 6. If both fungicides were put into a terrestrial environment, which one would be least available for uptake by plants? 7. Which fungicide is most susceptible to biological degradation? 8. Which fungicide is least likely to accumulate in organisms that are high in the food chain? Part 3 : Pesticide rate calculations. Please show your work for the opportunity for partial credit, even if your final answer is incorrect (4 questions, each 8 points = 32 points) 1. If you apply the minimum rate of Fontelis product on one acre of pumpkins, what is the equivalent rate of active ingredient on one acre? Please state your answer in pounds of active ingredient, taken to three decimal places. (8 points) 2. To spray a 2-acre pumpkin field with Bravo Weather Stik, at the maximum rate of product per acre, using a sprayer with a capacity of 100 gallons, that is set up to apply 30 gallons per acre, how much water and how much Bravo Weather Stik product needs to be put in the tank? Please state your answer in gallons for water, and in fluid ounces for Bravo Weather Stik . (8 points) 3. When an adjuvant of non-ionic surfactant (NIS) is needed, at a rate of 0.15% of volume, how much NIS should be added to the tank mix that was determined in question #2 above? Please state your answer in fluid ounces. (8 points)

4. Your application rate is 30 GPA at a pressure of 60 PSI. If you need to increase your application rate to 35 GPA while keeping the speed and nozzle size unchanged, what would be the new pressure rate needed? Please state your answer with pressure rounded to the nearest whole number. (8 points) EXTRA CREDIT! (2 points): Find a published efficacy report from the past 10 years that compares the performance of fungicides for control of powdery mildew on pumpkins. Write a complete and correct citation for this report here:

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version