Exam 2026|2027 Actual Complete Real Exam Questions And Correct
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What is added to a postemergence herbicide to increase the following
factors?
-spray coverage
-herbicide effectiveness
-spray potential
-droplet size which decreases drift -ANSWER-adjuvants
Glysophate and paraquat are often involved in this type of drift/ off
target movement. -ANSWER-particle drift
Dicamba, clomazone, and 2-4-D are commonly involved with this type
of drift. -ANSWER-vapor drift
_____of action: describes the the herbicide inhibits plant growth -
ANSWER-mode
______ of action: refers to the location on the plant the herbicide acts -
ANSWER-site
,The following symptoms describe what type of herbicide:
1. twisting
2. cupping of leaves
3. corn has rolled leaves
4. stalk bending -ANSWER-growth regulator
The following symptoms describe what type of herbicide:
1. yellowing of the leaves
2. interveinal chlorosis
3. chlorophil are killed -ANSWER-Photosynthesis inhibitors
Foliar applied herbicides are classified as contact or translocated.
Which of the 2 is described below?
Symptoms are fast to develop and require maximum foliar coverage. -
ANSWER-contact
True or false: no till or reduced tillage decreases perennial and biennial
weed species. -ANSWER-False
True or false: no till or reduced tillage deceases the number of large
seeded summer annuals that germinate deeper. -ANSWER-true
, true or false: no till or reduced tillage increases small seeded summer
annuals that germinate on or near the soil surface. -ANSWER-true
true or false: the following steps lead to maximizing the occurrence of
herbicide resistant weeds-
1. scouting regularly
2. using mixed herbicides with multiple modes of actions and sites of
action
3. cleaning off tillage equipment before leaving a field -ANSWER-false
true or false: Pathogen, time, host plant, and environment are all
factors that govern the development and seriousness of infectious
plant diseases. -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? -
ANSWER-tolerant
when a hybrid has defense mechanisms that limit infection we call
them what? -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. -ANSWER-true