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| a memory aid that diagrams the three important components necessary for disease: a susceptible plant, a virulent pathogen, and a favorable environment |
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| a memory aid similar to the disease triangle but also including the factor of time in the development of a disease |
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| a living plant attacked by or harboring a parasite or pathogen and from which the invader obtains part or all of its nourishment |
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| a disease-producing organism or biotic agent |
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to enter, invade, or penetrate and establish a parasitic relationship with a host plant
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| the time required for infection to occur under conducive environmental conditions (usually hours of leaf wetness and temperature for foliar pathogens) |
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| the time between infection and the production of new inoculum; the time after a vector has acquired a pathogen and before it can be transmitted |
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an indication of disease by reaction of the host, e.g., canker, leaf spot, wilt (contrasts with sign)
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an indication of disease from direct observation of a pathogen or its parts (contrasts with symptom)
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the procedure used to prove the pathogenicity of an organism, i.e., its role as the causal agent of a disease
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the ability to cause disease
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| an organism that lives in intimate association with another organism on which it depends for its nutrition; not necessarily a pathogen (contrasts with saprophyte) |
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| the living together of two different kinds of organisms that may, but does not necessarily, benefit each organism |
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| an organism that uses food supplied in the internal or the external environment of the host, without establishing a close association with the host, for instance by feeding on its tissues. |
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a degree or measure of pathogenicity; the relative capacity to cause disease
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possessing properties that prevent or impede disease development (contrasts with susceptible)
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| the ability of a plant to endure an infectious or noninfectious disease, adverse conditions, or chemical injury without serious damage or yield loss; in terms of pesticides, the amount of chemical residue legally permitted on an agricultural product entering commercial channels, usually measured in parts per million (ppm) |
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prone to develop disease when infected by a particular pathogen (contrasts with resistant)
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| the tendency of a plant or variety to escape infection as a result of having some property (as a thick cuticle or hairy surface) that prevents or hinders inoculation : disease-escaping ability. |
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| the management of disease by excluding the pathogen or infected plant material from crop production areas (e.g., by quarantines and embargoes) |
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| the destruction or removal of infected and infested plants or plant parts; decontamination of tools, equipment, containers, work space, hands, etc. |
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| the manner in which plants are grown, such as: application of nutrients, irrigation practices, type of cultivation; may be used for disease management |
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