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A small, often microscopic, unsegmented roundworm. Many are beneficial organisms, but some feed on plant tissues to cause disease or spread viruses.
Cestode
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Add RecommendationAdd TagsView All Assigned TagsNematode
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Add RecommendationAdd TagsView All Assigned TagsVector
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Add RecommendationAdd TagsView All Assigned TagsPathogen
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The browning and shriveling of foliage, especially at the leaf margin.
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Add RecommendationAdd TagsView All Assigned TagsA condition in which the branches in a tree die from the tips toward the main stem.
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Add RecommendationAdd TagsView All Assigned TagsAn irregularly shaped necrotic area on leaf stem or fruit.
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Add RecommendationAdd TagsView All Assigned TagsThe causal agent of disease. Usually refers to microorganisms.
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The physical evidence of a causal agent (e.g., insect eggs, borer hole, frass, mycelium, fruiting body).
Pathogen
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Add RecommendationAdd TagsView All Assigned TagsSign
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Add RecommendationAdd TagsView All Assigned TagsDisorder
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Add RecommendationAdd TagsView All Assigned TagsSymptom
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The influence, usually detrimental, of one plant on another, by the release of chemical substances.
is best defined as:
Allelopathy
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Add RecommendationAdd TagsView All Assigned TagsDefoliation
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Add RecommendationAdd TagsView All Assigned TagsAllelochemicals
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Add RecommendationAdd TagsView All Assigned TagsExploitation
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Pathogens or other pests that do not usually attack or infect healthy plants but tend to attack stressed plants.
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Add RecommendationAdd TagsView All Assigned TagsDisorders that are not caused by a pathogen and cannot be passed from one host to another.
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Add RecommendationAdd TagsView All Assigned TagsThe influence, usually detrimental, of one plant on another, by the release of chemical substances.
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Add RecommendationAdd TagsView All Assigned TagsThe transition zone from trunk to roots where the trunk expands into the buttress or structural roots.
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Capable of being spread from plants to result in infection of other plants or organisms.
Infectious
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Add RecommendationAdd TagsView All Assigned TagsContagious
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Add RecommendationAdd TagsView All Assigned TagsAcute
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Add RecommendationAdd TagsView All Assigned TagsChronic
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A sugary substance excreted by certain insects, including aphids and some scales, when feeding on plants.
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Add RecommendationAdd TagsView All Assigned TagsA root that encircles all or part of the tree trunk or the tree's other roots, constricting the vascular tissue and inhibiting secondary growth and the movement of water and photosynthates.
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Add RecommendationAdd TagsView All Assigned Tags(1) When referring to a substance - moving throughout an organism after absorption. (2) When referring to a condition, disease, disorder, or pest - affecting the entire organism.
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Add RecommendationAdd TagsView All Assigned TagsA fungus that appears as a black coating on the surface of leaves, branches, fruits, and other surfaces (including those of buildings), resulting from deposits of sugary excrement from aphids and scale insects.
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A small, often microscopic, unsegmented roundworm. Many are beneficial organisms, but some feed on plant tissues to cause disease or spread viruses.
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Add RecommendationAdd TagsView All Assigned TagsA disorder or disease occurring or recurring over a very long time, typically multiple growing seasons.
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Add RecommendationAdd TagsView All Assigned TagsPathogens or other pests that do not usually attack or infect healthy plants but tend to attack stressed plants.
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Add RecommendationAdd TagsView All Assigned TagsA sugary substance excreted by certain insects, including aphids and some scales, when feeding on plants.
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A conceptual model showing three factors required for plant disease - a susceptible host, a pathogen or an abiotic agent, and a conducive environment.
Noninfectious
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Add RecommendationAdd TagsView All Assigned TagsChronic
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Add RecommendationAdd TagsView All Assigned TagsPlant Disease Triangle
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Add RecommendationAdd TagsView All Assigned TagsTree Stress
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A group of mites in the family Eriophyidae. Typically smaller than other mites, requiring higher magnification to see and often inducing the development of leaf galls.
Anaerobic
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Add RecommendationAdd TagsView All Assigned TagsCentipedes
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Add RecommendationAdd TagsView All Assigned TagsNematode
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Add RecommendationAdd TagsView All Assigned TagsEriophyid Mites
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A whitish or yellowish leaf discoloration caused by a lack of chlorophyll.Often caused by nutrient deficiency.
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Add RecommendationAdd TagsView All Assigned TagsA condition in which the branches in a tree die from the tips toward the main stem.
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Add RecommendationAdd TagsView All Assigned TagsWithout or with a restricted supply of air. The process that occurs in the absence of oxygen.
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Add RecommendationAdd TagsView All Assigned TagsAn exudation of sap, gum, or resin, often in response to disease or insect damage.
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Decay
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Add RecommendationAdd TagsView All Assigned TagsAerobic
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Add RecommendationAdd TagsView All Assigned TagsSystemic
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Add RecommendationAdd TagsView All Assigned TagsChronic
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(1) When referring to a substance - moving throughout an organism after absorption. (2) When referring to a condition, disease, disorder, or pest - affecting the entire organism.
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Add RecommendationAdd TagsView All Assigned TagsAn abnormal condition that impairs the performance of one or more vital functions. Often associated with noninfectious agents or abiotic factors.
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Add RecommendationAdd TagsView All Assigned TagsA fungus that appears as a black coating on the surface of leaves, branches, fruits, and other surfaces (including those of buildings), resulting from deposits of sugary excrement from aphids and scale insects.
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Add RecommendationAdd TagsView All Assigned Tags(1) In pathology, a biotic or abiotic agent that transmits a pathogen. (2)In mechanics or rigging, a quantity that has both magnitude and direction (e.g., force).
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An organism (including, but not limited to, weeds, insects, bacteria, or fungi)that is damaging, noxious, or a nuisance.
Pest
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Add RecommendationAdd TagsView All Assigned TagsPredator
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Add RecommendationAdd TagsView All Assigned TagsParasite
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Add RecommendationAdd TagsView All Assigned TagsPathogen
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Disorder
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Add RecommendationAdd TagsView All Assigned TagsSymptom
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Add RecommendationAdd TagsView All Assigned TagsSign
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Add RecommendationAdd TagsView All Assigned TagsPathogen
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The transition zone from trunk to roots where the trunk expands into the buttress or structural roots.
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Add RecommendationAdd TagsView All Assigned TagsDisorders that are not caused by a pathogen and cannot be passed from one host to another.
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Add RecommendationAdd TagsView All Assigned TagsCapable of being spread from plants to result in infection of other plants or organisms.
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Add RecommendationAdd TagsView All Assigned TagsA factor that affects the health or condition of a tree.
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A disorder or disease occurring or recurring over a very long time, typically multiple growing seasons.
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Add RecommendationAdd TagsView All Assigned TagsPathogens or other pests that do not usually attack or infect healthy plants but tend to attack stressed plants.
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Add RecommendationAdd TagsView All Assigned TagsA whitish or yellowish leaf discoloration caused by lack of chlorophyll.Often caused by nutrient deficiency.
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Add RecommendationAdd TagsView All Assigned TagsWithout or with a restricted supply of air. The process that occurs in the absence of oxygen.
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An abnormal condition that impairs the performance of one or more vital functions. Often associated with noninfectious agents or abiotic factors.
Disorder
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Add RecommendationAdd TagsView All Assigned TagsSymptom
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Add RecommendationAdd TagsView All Assigned TagsCanker
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Add RecommendationAdd TagsView All Assigned TagsAcute
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Disorders that are not caused by a pathogen and cannot be passed from one host to another.
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Add RecommendationAdd TagsView All Assigned TagsA darkening of the xylem or phloem of woody plants in response to disease, insect boring, or injury.
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Add RecommendationAdd TagsView All Assigned TagsAn exudation of sap, gum, or resin, often in response to disease or insect damage.
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Add RecommendationAdd TagsView All Assigned TagsA conceptual model showing three factors required for plant disease -a susceptible host, a pathogen or an abiotic agent, and a conducive environment.
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A small, often microscopic, unsegmented roundworm. Many are beneficial organisms, but some feed on plant tissues to cause disease or spread viruses.
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Add RecommendationAdd TagsView All Assigned TagsA plant disorder characterized by a shortening of the internodes and a proliferation of terminal shoots forming a dense, brushlike mass of twigs.
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Add RecommendationAdd TagsView All Assigned TagsOne of a number of separate plants of certain obligate pathogens(e.g., rust fungi) or insects (e.g., adelgids) on which successive life stages develop.
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Add RecommendationAdd TagsView All Assigned TagsThe loss of leaves from a tree or other plant by biological, chemical, or mechanical means (as opposed to natural shedding).
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