This dimension marks whether a pest or disease is currently under formal quarantine restriction. Wikipedia notes that invasive species have "become serious economic, social, and environmental threats worldwide," a threat level that is exactly why some are placed under strict quarantine control. Browsing by quarantine status separates regulated pests and diseases from those that are not.
Facts
Comparison
Typical Transmission or Damage Mode Quarantine Status
Sources
1. Wikipedia: Pest (organism)
WikipediaPest (organism), damage-mechanism sectionQuote, Pest (organism), damage-mechanism section
there is the direct injury they cause to the plants as they feed on the tissues; a reduction in leaf surface available for photosynthesis, distortion of growing shoots, a diminution of the plant's growth and vigour, and the wilting of shoots and branches caused by the insects' tunneling activities
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