Download Illinois Field Crop Applicators Test Exam: Questions and Answers on Pest Management and more Exams Pest Management in PDF only on Docsity!
ILLINOIS FIELD CROP APPLICATORS
TEST EXAM | QUESTIONS & 100 %
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An integrated pest management program is based upon what factors? Correct Answer: various, economical, environmentally sound, socially acceptable What is the number of pests that should be controlled to prevent economic damage from occurring? Correct Answer: Economic threshhold Number of pests, costs of various treatments, expected yield, and expected grain value are all factors to determine.... Correct Answer: Economic Injury level What should be done if scouting detects an important pest, but its numbers do not reach the economic threshold? Correct Answer: Do not treat, but scout again later. When scouting, where in the field should you sample?
Correct Answer: random What are the 4 types of control measures used in an IPM? Correct Answer: Cultural, Mechanical, Biological, Chemical At what stage in the life-cycle of a Corn rootworm does it prune and tunnel through the roots causing stalk lodging? Correct Answer: Larvae At what life-cycle stage does a corn rootworm cause ear damage by feeding on the silks? Correct Answer: Adult What are the economic thresholds when scouting for corn rootworm beetles in corn? Correct Answer: When silks are green, 5 or more beetles per plant if silks are clipped within 1/2 inch of the ear tip. What are the economic thresholds when scouting for corn rootworm beetles in soy? Correct Answer: From late July to late august at least 5 beetles per unbaited pherocon AM trap in soybeans or .75 beetles per plant in non-rotated corn. What damage does a black cutworm larvae do to corn seedlings?
They chew on the roots and root hairs of seedlings resulting in irregular emergence, reduced stands, and stunted or wilted plants. Injured plants may turn purple because they cannot take up phosphorus. Correct Answer: Japanese beetle grubs They are metallic looking green beetles that are 3/8 to 1/2 and inch long with coppery wing covers. Correct Answer: Japanese beetle adults. What kind of damage do Japanese beetle adults cause? Correct Answer: feed on the silks 1/4 inch beetle, black triangle on neck just below the head? Correct Answer: adult bean leaf beetle. When bean leaf beetles feed on cotyledons and first true leaves what is the amount of beetles per foot of row that is the economic threshold? Correct Answer: 16 or more When bean leaf beetles eat holes in leaves during the vegetative growth stage what is the percent defoliation that is the economic threshold? Correct Answer: 30 - 40%
when bean leaf beetles feed during pod fill what is the percentage of defoliation or damaged pods that is the economic threshold? Correct Answer: 20% defoliation or 5-10% injured pods pinhead sized, yellow, round, soft bodied, insects on the undersides of soybean leaves Correct Answer: soybean aphids What pest causes the following damage: suck sap from sobean plants causing the leaves to curl and turn yellow, excrete honeydew, sooty mold grows on the honeydew lowering photosynthesis, heavy infestations cause lowers pod counts, and they act as a vector for pathogens. Correct Answer: soybean aphids What pest causes the following damage: Stripping leaves, fine silk on leaves and between plants, bronzing leaves, curled leaves and leaf drop. Correct Answer: spider mites What alfalfa weevil lifecycle stage is described here: up to 1/2 inch long with dark heel. Green with stripe down back. Correct Answer: Larvae What alfalfa weevil lifecycle stage is described here: 1/2 inch long beetle that is meduim brown w/ dark brown stripe. hard shell.
name the pest- Appearance is grean brown w/ orange stripes up to 1.5 inches long. Damage they cause is feed at night and on cloudy days chewing through wheat stems causing heads to fall off. Correct Answer: armyworm larvae The following methods of controlling insect pest are examples of what type of method?
- Fly free wheat planting dates for hessian flies
- Early cutting of alfalfa to reduce alfalfa weevil damage Correct Answer: Cultural the following methods of controlling insect pests are examples of what type of method?
- Tillage to destroy overwintering grasshopper eggs
- late season weed removal to control stalk borer Correct Answer: Mechanical The following methods of controlling insect pests are examples of what type of method?
- tachinid flies parasitizing army worms
- genetically modified corn containing Bt Correct Answer: biological The following methods of controlling insect pests are examples of what type of method?
- rescue treatment of corn for black cutworm
- banding insecticide over corn row at planting time to control corn root-worm
Correct Answer: chemical these are 4 main characteristics used to identify what type of weed seedlings?
- cotyledons
- true leaves
- arrangement of true leaves
- leaf petioles Correct Answer: broadleaf These 3 types of underground vegetative reproductive structures are called what?
- rhizomes
- budding roots
- tubers/ bulbs Correct Answer: propagules Name the pest that competes with crops for: light, nutrients, moisture, and space. Correct Answer: weeds abbreviation for: Early Preplant applications Correct Answer: EPP abbreviation for: Preplant incorporated applications Correct Answer: PPI
Most weed seeds germinate in the top how many inches of the top soil? Correct Answer: 2 inches Should you use a higher or lower labeled rate of a soil applied herbicide when the following factors are observed:
- soil texture is high in clay
- organic matter is high %
- herbicide alone (not tank mix)
- crop residue soil cover is high Correct Answer: higher Should you use a higher or lower labeled rate of a soil applied herbicide when the following factors are observed:
- soil texture is high in sand
- organic matter is low %
- herbicide is tank mix (not alone)
- crop residue soil cover is low Correct Answer: lower Do the listed factors lead to a higher or lower carryover potential for herbicides to the next crop?
- herbicide persistence (half-life) is long 2.Herbicide application was done later in the season
- precipitation totals are low
- temperature is cool
- rotational crop time is short Correct Answer: higher Do the listed factors lead to a higher or lower carryover potential for herbicides to the next crop?
- herbicide persistence (half-life) is short 2.Herbicide application was done early in the season
- precipitation totals are high
- temperature is warm
- rotational crop time is long Correct Answer: lower Treflan, Command, canopy, scepter, and pursuit are all herbicides prone to carryover that are used in what crop? Correct Answer: soybeans Atrazine, princep, exceed, lumax/lexer are all herbicides prone to carryover that are used in what crop? Correct Answer: Corn True or false: herbicide combinations (pre-mix, tank-mix, etc.) are used to:
- the conditions are so that weeds are actively growing Correct Answer: lower rate Do the listed factors lead to higher or lower herbicide activity?
- rainfall 2-6 hours after the application
- temperature is hot
- soil moisture is adequate
- relative humidity is high Correct Answer: higher Do the listed factors lead to higher or lower herbicide activity?
- rainfall less than 30 minutes after the application
- temperature is cool
- soil moisture is poor
- relative humidity is low Correct Answer: lower What is added to a postemergence herbicide to increase the following factors?
- spray coverage
- herbicide effectiveness
- spray potential
- droplet size which decreases drift Correct Answer: adjuvants
Glysophate and paraquat are often involved in this type of drift/ off target movement. Correct Answer: particle drift Dicamba, clomazone, and 2- 4 - D are commonly involved with this type of drift. Correct Answer: vapor drift _____of action: describes the the herbicide inhibits plant growth Correct Answer: mode ______ of action: refers to the location on the plant the herbicide acts Correct Answer: site The following symptoms describe what type of herbicide:
- twisting
- cupping of leaves
- corn has rolled leaves
- stalk bending Correct Answer: growth regulator The following symptoms describe what type of herbicide:
- yellowing of the leaves
- interveinal chlorosis
- cleaning off tillage equipment before leaving a field Correct Answer: false true or false: Pathogen, time, host plant, and environment are all factors that govern the development and seriousness of infectious plant diseases. Correct Answer: true when a hybrid has no major defense mechanisms to a disease but the yield loss is less compared to a susceptible hybrid we call them what? Correct Answer: tolerant when a hybrid has defense mechanisms that limit infection we call them what? Correct Answer: resistant true or false: monocyclic diseases infect a plant and complete only one generation but doesn't reinfect during the same growing season. most root diseases are this way. Correct Answer: true true or false: polycyclic diseases can infect and complete many generations within the same growing season. many foliar diseases are this way. Correct Answer: true _____ fungicides are fungicides that remians of the surface of the plant
Correct Answer: contact ______are fungicides that are absorbed into the immediate area of the application but are not translocated far from the site of uptake. Correct Answer: local penetrants ______ fungicides are absorded by the plant and will move only upward in the plant. Correct Answer: systemic What unit of measurement is used to measure spray droplets? they are equal to 1/25,000 of an inch Correct Answer: microns Droplets below ____ microns in size are at risk of drift. Correct Answer: 100 _______ (VMD) describes the diameter of droplet where half the droplets in the spray are smaller and half are bigger. so basically the median. Correct Answer: Volume Medium Diameter When a droplet spectrum category and VMD range is listed as extremely fine and < microns what is the abbreviation for it? Correct Answer: XF
Correct Answer: XC When a droplet spectrum category and VMD range is listed as ultra coarse and > microns what is the abbreviation for it? Correct Answer: UC ______ nozzles have a wide angle of spray, vary greatly with pressure Correct Answer: flooding _____ nozzles- pre-orifice, turbulence chamber, coarse droplets. Correct Answer: turbo flooding What nozzle type has a HIGH FLOW rate and wide angle? Correct Answer: high flow what nozzle type extends the range of lower pressures you can use because of its modified oriface? Correct Answer: extended range nozzles What device monitors application factors like flow rate, pressure, and speed? Correct Answer: spray rate controller What information does the operator need to put into the spray rate controller?
Correct Answer: effective sprayed width and target GPA amount of time the nozzle is held open during pulse applications Correct Answer: duty cycle _____ of the solution is the weight per unit of volume and expressed commonly as pounds per gallon Correct Answer: density how much does a gallon of water weigh in pounds? Correct Answer: 8.
