Exam (elaborations)
Il Field Crop exam questions with verified solutions
- Course
- Institution
Il Field Crop exam questions with verified solutions
[Show more]
Content preview
Illinois Field Crops Applicatorquestions with verified
solutions 2024-2025
An Integrated Pest Management program is based upon - answer
1.Scouting for pests-understanding pest biology 2.Environmental
information-growth stages of field crops
3.technology to prevent unacceptable thresholds of pest damage by
most econmomical means-economic threshold of insects, diseases
or weeds
4. Lowest possible risk to people , property, resources and
environment-socially acceptable control measures
When scouting, where in the field should one sample? - answer
1.randomly-avoid borders rows or field edges
2.regularly scout at least 1x per week
what should be done if scouting detects an important pest but its
numbers do not reach the economic threshold? - answer Do not
treat, but scout again after an appropriate time period
What is the number of pests that should be controlled to prevent
economic damage from occurring? - answer economic threshold
injury = control
List factors that are considered in determining an economic injury
level, the number of pest where the value of crop loss from these
pests equals the cost of controlling them - answer 1. number of
pests or estimate of the amount of damage
2. cost of various treatment options
3.expected yield
, 4.expected grain value
List 3 examples of economic thresholds for some insect pests -
answer 1. black cutworms-3% or more of plants are cut
2. bean leaf beetle-defoliation reaches 30% before bloom
3. Potato leaf hopper-certain number are collected per sweep at a
given plant height
what types of control measures can be used in an ipm program -
answer 1. mechanical
2. physical
3. biological
4. chemical
what kind of damage is caused by corn rootworms, the most
important economic insect pest of corn in illinois? - answer 1.
Larvae-chew on and tunnel in roots
2. adults-feed on and cut silks at ear tip
-reduce kernal pollination
What are the economic thresholds when scouting for corn rootworm
beetles? - answer 1. when the silks are green, if silks are clipped
within 1/2 inch of the tip of the ear.
2. from late july to late august
a. in soybeans: 1.5 beetles per unbaited pherocon am trap per day
b. in continuous corn: 2 beetles per unbaited pherocon am trap per
day
what kind of damage does black cutworm larvae do to corn
seedlings? - answer 1. chew small pinholes in corn leaves
2. cut plants off at or below soil surface
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GUARANTEEDSUCCESS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72349 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now