AGRONOMY EXAM 4 QUESTIONS AND ANSWERS
UPDATED 2025/2026 ALL ANSWERS 100% CORRECT
VERIFIED BEST GRADED A+ FOR SUCCESS
disease triangle correct answers
Plant disease occurs when a pathogen, a susceptible
host, and a favorable environment are present. These
three factors form the:
disease triangle.
Plant Diseases correct answers
broadly defined as a progressive deviation from a plant's
normal development, appearance, or function.
Plant pathogens correct answers
are living organisms that cause disease.
Saprophytes correct answers
are organisms that use dead organic matter to obtain
nutrients when a susceptible host is not present or
environmental conditions are unfavorable.
Obligate parasites correct answers
a parasitic organism that cannot live independently of its
host. Must obtain nutrition from living tissue. If no host
,AGRONOMY EXAM 4 QUESTIONS AND ANSWERS
UPDATED 2025/2026 ALL ANSWERS 100% CORRECT
VERIFIED BEST GRADED A+ FOR SUCCESS
present, it will die or it can produce survival structures
like spores
pathogens include correct answers
* Fungi
* Bacteria
*Viruses
* Nematodes
* Diseases transmitted by insects
Fungi correct answers
Fungi disease pathogens are typically parasitic organisms
composed of filamentous threads call hyphae that are
used to absorb nutrients. The hyphae grow and for a
web-like mass called a mycelium.
Most fungal diseases can be managed by using various
strategies: correct answers
* crop rotations
* resistant crops
* planting disease-free seeds
, AGRONOMY EXAM 4 QUESTIONS AND ANSWERS
UPDATED 2025/2026 ALL ANSWERS 100% CORRECT
VERIFIED BEST GRADED A+ FOR SUCCESS
* removing plant debris
* chemical fungicides
Bacteria correct answers
microscopic, single-celled organisms.
Most plant pathogenic bacteria are rod-shaped and
reproduce by fission.
Bacterial Diseases correct answers
Most plant pathogenic bacterial diseases are present on
plant surfaces.
Typically survive and feed on plant cell exudates. (natural
or damage) Overwinter in soil.
When environmental conditions become favorable (moist
& humid), the bacteria can become
pathogenic on the host.
Viruses correct answers
Extremely small pathogens.
100 times smaller than bacteria.
Require living cells to reproduce. (obligate parasite)
UPDATED 2025/2026 ALL ANSWERS 100% CORRECT
VERIFIED BEST GRADED A+ FOR SUCCESS
disease triangle correct answers
Plant disease occurs when a pathogen, a susceptible
host, and a favorable environment are present. These
three factors form the:
disease triangle.
Plant Diseases correct answers
broadly defined as a progressive deviation from a plant's
normal development, appearance, or function.
Plant pathogens correct answers
are living organisms that cause disease.
Saprophytes correct answers
are organisms that use dead organic matter to obtain
nutrients when a susceptible host is not present or
environmental conditions are unfavorable.
Obligate parasites correct answers
a parasitic organism that cannot live independently of its
host. Must obtain nutrition from living tissue. If no host
,AGRONOMY EXAM 4 QUESTIONS AND ANSWERS
UPDATED 2025/2026 ALL ANSWERS 100% CORRECT
VERIFIED BEST GRADED A+ FOR SUCCESS
present, it will die or it can produce survival structures
like spores
pathogens include correct answers
* Fungi
* Bacteria
*Viruses
* Nematodes
* Diseases transmitted by insects
Fungi correct answers
Fungi disease pathogens are typically parasitic organisms
composed of filamentous threads call hyphae that are
used to absorb nutrients. The hyphae grow and for a
web-like mass called a mycelium.
Most fungal diseases can be managed by using various
strategies: correct answers
* crop rotations
* resistant crops
* planting disease-free seeds
, AGRONOMY EXAM 4 QUESTIONS AND ANSWERS
UPDATED 2025/2026 ALL ANSWERS 100% CORRECT
VERIFIED BEST GRADED A+ FOR SUCCESS
* removing plant debris
* chemical fungicides
Bacteria correct answers
microscopic, single-celled organisms.
Most plant pathogenic bacteria are rod-shaped and
reproduce by fission.
Bacterial Diseases correct answers
Most plant pathogenic bacterial diseases are present on
plant surfaces.
Typically survive and feed on plant cell exudates. (natural
or damage) Overwinter in soil.
When environmental conditions become favorable (moist
& humid), the bacteria can become
pathogenic on the host.
Viruses correct answers
Extremely small pathogens.
100 times smaller than bacteria.
Require living cells to reproduce. (obligate parasite)
