18 Questions
What term is used to describe different symptoms exhibited by a plant?
Syndrome
Which type of symptoms are the immediate and direct results of the causal agent's activities on the invaded tissues?
Primary symptoms
What is the term used to describe the effects on distant and uninvaded plant parts?
Secondary symptoms
Which principle states that for a microorganism to be considered the cause of a disease, it must be isolated from a diseased plant and grown in pure culture?
Koch’s postulates
What is the term for an indication by a plant of a pathologic condition that distinguishes a particular disease from others?
Symptom complex
In plant pathology, what are different symptoms exhibited by a plant collectively called?
Syndrome
Why is diagnosis based on symptoms alone not reliable?
Different diseases may show similar symptoms.
What is the significance of bacterial ooze in plant disease diagnosis?
It is a unique sign that indicates a specific disease.
Which term best describes the process of diagnosing plant diseases based on characteristic symptoms and signs?
Symptomatology
Why is it important to accurately diagnose plant diseases?
For plant disease control
What makes tomato wilting a symptom in plant disease diagnosis?
It is a visual characteristic observed in plants affected by certain diseases.
How do Koch's postulates contribute to plant disease diagnosis?
By establishing a set of criteria to link a particular pathogen with a specific disease
What is the relationship between symptom and sign in plant disease diagnosis?
The presence of symptoms and signs together leads to a more reliable diagnosis.
Why is it important to recognize secondary invaders or saprophytes in plant disease diagnosis?
They can be mistaken as the primary agents, affecting the accuracy of diagnosis.
Which of the following is an example of a plant disease caused by a protist?
Clubroot of cabbage caused by Plasmodiophora brassicae
Why can the diagnosis of plant diseases be complicated by secondary invaders or saprophytes?
Saprophytes may be mistaken as primary agents, leading to misdiagnosis.
In plant pathology, what does Koch's postulates refer to?
A set of guidelines to determine the cause of an infectious disease.
How does the presence of signs contribute to the reliability of plant disease diagnosis?
Signs indicate the presence of pathogens while symptoms do not.
Test your knowledge on concepts, terms, and principles of plant pathology with a focus on disease triangle, diagnosis, classification, and Koch's postulates. Explore the economic importance of plant diseases and the science behind identifying specific diseases.
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