Category: R

  The significant decrease in the elongation of the stem segments along the vertical axis has occurred without any corresponding decrease in the dimensions of the foliage.  

  The process of scrutinizing a harvest and eliminating any diseased or extraneous plants, such as those that do not conform to their expected characteristics, is known as crop culling.  

  This phrase refers to a particular phenomenon that occurs in plants, wherein a circular or ring-like area on a leaf or leaves is surrounded by tissue that may appear either yellowish or brownish in color. The affected tissue may be unhealthy or show abnormal dark green coloring.  

Upon re-isolation of an organism from an experimentally infected host or inoculated substrate, a culture is formed. This culture, while known to some, is infrequently mentioned in plant pathological literature, and therefore not advised for use.  

The period subsequent to the ingestion of virus-laden nourishment by a vector, during which the vector is competent to transmit the virus.  

  Resistance to certain strains of the pathogen is observed, while other strains are not affected. This phenomenon is usually associated with oligogenic resistance cases where there is a gene-for-gene correlation between the host and the pathogen. The term “horizontal resistance” is more appropriate than the interchangeable term “vertical resistance” because it precisely defines the…

Resistance to all races of a pathogen pertains to the capacity of an organism to combat infections instigated by diverse strains of the same pathogen. This classification of resistance is also acknowledged as horizontal resistance and is favored due to its illustrative quality. It is important to take note that this sort of resistance is…

  The resistance that is noticeable in natural infections under field conditions is not discernible during the controlled experimental conditions of resistance tests. This type of resistance is expressed when the inoculum potential is low and is highly sensitive to environmental factors. Horizontal resistance typically falls under this category, but it’s important to note that…

Following the growth of a second planting of a perennial species after a previous planting of the same or a closely related species on the same site, there may be a significant decrease in the rate of root and shoot growth. B.M. Savory proposed a term, specific replant disease, to distinguish this condition from soil…

A nutritional regime predicated on the cyclic intake of victuals during the span of seven days, with a strong accent on abstaining from the iteration of comestibles.