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Herbicide & Pesticide Practicum (15 Minutes---100 Points Total) Name________________________________ Please answer the following questions. Be specific. 1.
Explain what the difference is between the term herbicide and
the term pesticide (15 pts)?
Herbicide: Chemical used specifically for control of weeds or other unwanted plants . Pesticide: A substance used to kill, control, repel, or mitigate any pest . Umbrella term that includes insecticides, fungicides, rodenticides, herbicides, and germicides . 2. What is the basic definition of a weed (15 pts)? A plant that interferes with the management objectives at a particular location. A plant growing where it isn't wanted . Use the label for RAPTOR herbicide (pages 4-6 of this exam) to answer the following questions. 3.
You plan to spray RAPTOR, a postemergence herbicide, to control
Common Lambsquarter in your minimum tillage
soybean crop. You have not used this herbicide before so you
read up on its use in soybeans .
a. Assuming you will not precede your application of RAPTOR with a full-labeled rate of a soil applied grass herbicide, what application rate should you use to control Common Lambsquarter (6 pts)? 5 fluid ounces/A b. Assuming a broadcast rate of 5 fluid ounces per acre, what acreage of soybeans will 1 gallon of RAPTOR treat (6 pts)? 25.6 acres c. What size should your Common Lambsquarter plants be when you apply RAPTOR (6 pts)? 2-5 inches Please complete the following questions. For questions that involve calculations make sure to show all of your work in order to receive partial credit if your answer is incorrect! You will be required to use some of the conversions listed bellow-make sure to watch your units . Useful Conversion Factors: 1
liter (l) = 1,000 milliliters (ml) 4.
You have determined that you have 200 acres of wheat that needs
to be sprayed. The boom on your sprayer is 30 feet and has 18
nozzles. You have XR8002 nozzles, which are designed to deliver
0.2 gallons/minute at 40 psi. To make sure, you check the output
of 4 random nozzles and determine that they deliver 12.3, 14.0,
11.2 and 13.5 oz/30 seconds at 40 psi. Based on the output of
the 4 nozzles, what is the delivery rate in gallons/minute
for your boom (30 pts)?
Nozzle 1
Nozzle 2
Nozzle 3
Nozzle 4
gal/min/nozzle
gal/min/boom
Now is your chance to stretch out. You will need to refer to the plant specimen to answer the following questions. 5. Identify weed X (10 pts) Bull thistle ( Cirsium vulgare) 6. Does weed X have a perennial, annual or biennial life cycle (6 pts)? Biennial 7. Is weed X a monocot (monocotyledon) or dicot (dicotyledon) (6 pts)? Dicot
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