Related Experiment Video
Updated: May 15, 2026
06:04
Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples
Published on: September 28, 2022
Travelling with tea: a Tuckerella's tale
J J Beard1, R Ochoa, C C Childers
1Department of Entomology, University of Maryland, College Park, MD 20742, USA. jjbeard@umd.edu
Experimental & Applied Acarology
|December 26, 2012
Summary
Tuckerella japonica, a mite associated with tea plants, has spread globally with tea cultivation. This study clarifies its identification and describes previously unknown life stages.
Area of Science:
- Zoology
- Acarology
- Plant Pathology
Background:
- Tuckerella japonica Ehara is a mite species frequently found on tea plants (Camellia sinensis).
- Global trade and cultivation of tea have facilitated the dispersal of this mite across continents.
- Accurate identification is crucial for understanding its distribution and impact on agriculture.
Observation:
- Tuckerella japonica shares morphological similarities with Tuckerella flabellifera, leading to historical misidentifications.
- This taxonomic confusion has resulted in inaccurate host plant records and distribution data.
- The male and immature developmental stages of T. japonica are described here for the first time.
Findings:
- Tuckerella xinglongensis, previously described from China, is identified as a junior synonym of T. japonica.
- Morphological differences are detailed to distinguish T. japonica from T. flabellifera.
- The study confirms the loss of a tritonymphal stage in the ontogeny of male T. flabellifera.
Implications:
- Correcting misidentifications of T. japonica and T. flabellifera is essential for accurate pest management strategies.
- Revised distribution data will aid in predicting and preventing future introductions of T. japonica into new regions.
- The detailed descriptions of life stages enhance taxonomic understanding and support further research on Tuckerella mites.
More Related Videos
Related Concept Videos
01:04Travelling Waves
A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is water;...
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is water;...
00:53Migration
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
01:27Latitudes and Departures
Latitudes and departures are essential concepts in surveying, providing a systematic way to analyze the projections of traverse lines. These projections allow surveyors to interpret a line's north-south and east-west components, which are crucial for precisely calculating areas, bearings, and lengths. Latitude is the north-south projection of a line, calculated as the product of the line's length and the cosine of its bearing. Departure, conversely, is the east-west projection obtained by...
01:16Kendall's Tau Test
Kendall's tau test, also known as the Kendall rank coefficient test, is a nonparametric method for assessing association between two variables. This test is particularly useful for identifying significant correlations when the distributions of the sample and population are unknown. Developed in 1938 by the British statistician Sir Maurice George Kendall, the tau coefficient (denoted as τ) serves as a rank correlation coefficient, with values ranging from -1 to +1.
A τ value of +1 indicates that...
A τ value of +1 indicates that...
02:12Short-distance Transport of Resources
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
01:31ABC Transporters: Exporter
ATP-binding cassette or ABC transporter is the largest superfamily of integral membrane proteins. The transporters have transmembrane-binding domains (TMDs) and nucleotide-binding domains (NBDs). The TMDs are specific to their substrates, whereas the NBDs are similar to engines that complete ATP hydrolysis to complete the substrate transport. They can be full transporters consisting of two TMDs and NBDs, half transporters with one TMD and NBD, while some encoded with a single TMD or NBD are...