- 行业: Plants
- Number of terms: 21554
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The American Phytopathological Society (APS) is a nonprofit professional, scientific organization dedicated to the study and control of plant diseases.
The double-stranded, helical molecule that contains genetic code information; each repeating unit, or nucleotide, is composed of deoxyribose (a sugar), a phosphate group, and a purine (adenine or guanine) or a pyrimidine (thymine or cytosine) base.
Industry:Plants
Crop that stimulates germination of seeds of a parasitic plant such as witchweed (Striga spp. ), but is not susceptible to infection by the parasitic plant; helps reduce seed populations of the parasite in soil so a susceptible crop can be planted.
Industry:Plants
A means to quantify accumulating opportunities for pathogen infection (e.g. infection periods) to a pre-determined threshold that requires a disease management activity (e.g. a fungicide application); used in disease prediction or forecasting.
Industry:Plants
A procedure used in plant breeding in which genetic markers that are (a) easy to identify and (b) linked to desirable genetic traits that are difficult to identify (such as disease resistance) are used to aid in selection from a population.
Industry:Plants
A mixture of organic and/or inorganic chemical compounds and water that provides the nutrients needed for the growth of a microorganism in vitro; for higher plants, a mixture of fertilizers and other components in which a plant is growing.
Industry:Plants
Small fragment of nucleic acid with a free 3'-hydroxyl group necessary for initiation of DNA, and, sometimes, RNA synthesis; often specific fragments chosen for use in polymerase chain reaction (PCR) for rapid identification of pathogens.
Industry:Plants
Succession of all of events and interactions among the host, parasite and environment that occur in a disease, from initial infection of the plant by a causal agent, through pathogenesis, to over-seasoning, until another infection occurs.
Industry:Plants
The theorized competitive disadvantage of unnecessary virulence genes; races with excess genes would have decreased fitness relative to races with fewer virulence genes, so a "super-race" would be less likely to appear in multiline crops.
Industry:Plants
Resistance reactions that have no distinct classes but vary continuously from resistant to susceptible, the result of few to many genes the individual effects of which may be small and difficult to detect. (see qualitative resistance. )
Industry:Plants
# A disease of certain grasses and cereals, especially rye, caused by Claviceps spp;
# A sclerotium, or resting structure, produced by Claviceps species and other closely related fungi in infected flowers of parasitized grain plants .
Industry:Plants
