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The western flower thrips [Frankliniella occidentalis (Pergande)] is an invasive pest insect in agriculture. This species of thrips is native to the Southwestern United States [1] but has spread to other continents, including Europe, Australia (where it was identified in May 1993 [1]), and South America via transport of infested plant material.
However, some thrips, including rose thrips, onion thrips, and western flower thrips, damage plants. They can weaken vegetables and flowers and even spread plant diseases . What Do Thrips Look Like?
The generic and English name thrips is a direct transliteration of the Ancient Greek word θρίψ, thrips, meaning "woodworm". [4] Like some other animal-names (such as sheep, deer, and moose) in English the word "thrips" expresses both the singular and plural, so there may be many thrips or a single thrips. Other common names for thrips ...
They are sites where a female has oviposited into developing flower buds or fruitlets. Despite the cosmetic damage suffered by these light skinned apple cultivars they are seemingly unaffected by most thrip vectored viruses. Infested apples of the mountain west simply provide a natural setting for Western Flower Thrips to thrive and reproduce.
To protect their eggs, thrips insert them into various types of plant tissue - eggs can be found in the stems, leaves, or flowers of plants. [8] Thrips hatch in 2–3 days and complete their lifecycle in 20–30 days. [2] Adult thrips feed on the flower bud, stem, and leaf parts of the plant. [8]
The bug Orius insidiosus has been successfully used against the two-spotted spider mite and the western flower thrips (Frankliniella occidentalis). [43] Predators including Cactoblastis cactorum (mentioned above) can also be used to destroy invasive plant species.
The 'eastern' part of its common name is due to its common occurrence to the east of the Rocky Mountains, whereas the habitat of western flower thrips extends through the entire United States and Canada. [2] It is challenging to distinguish the various species of thrips, without resorting to microscopic examination. [2]
It is used as a control agent against thrips on avocado trees. Together with F. vespiformis it has been marketed in Europe as a control agent against thrips in greenhouses. F. vespiformis also feeds on mites, nymphs of a whitefly species and the larvae of an agromyzid fly. F. megalops has been used for thrips control in "internal landscapes".