The length of the life cycle and life expectancy of the adults depend on temperature and food quality. Adult thrips overwinter in plant debris, bark, or other materials. There are thousands of species of thrips which feed on a wide variety of plants and insects. Western flower thrips (WFT) is probably the most important insect pest for the cut flower industry, causing economic loss to chrysanthemums, gerberas, anthuriums, lisianthus, dahlias, roses and other crops. Life history and life tables of western flower thrips, Frankliniella occidentalis (Thysanoptera: Thripidae), on English cucumbers. Western flower thrips (WFT), Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) is a native insect of the western part of North America that was first reported in 1895.In the 1970s and early 1980s, this species spread throughout North America (Beshear 1983). The three spray strategy. At higher temperatures thrips develop more quickly requiring a shorter length of time between sprays. Distribution Sydney basin, Newcastle, Bowral, Canberra, Port Macquarie, Buronga, Jervis Bay References Hill, M. 1994. Egg to adult development is completed within 12 to 22 days, depending on temperature and host plant species. The eggs hatch in 2 to 14 days, depending on temperature. Western Flower Thrips. Western flower thrips, , first arose as an important invasive pest of many crops during the 1970s–1980s. In Western Australia, populations tend to peak in spring (mid-late October) and autumn (March-May). The tremendous growth in international agricultural trade that developed then fostered the invasiveness of western flower thrips. Western flower thrips, Frankliniella occidentalis, first arose as an important invasive pest of many crops during the 1970s–1980s. The western flower thrips [Frankliniella occidentalis (Pergande)] is an invasive pest insect in agriculture. Western Flower Thrips (Frankliniella occidentalis) are very small and slender insects with fringed wings and are a common insect found in greenhouses and gardens.Thrips range in color from translucent white to yellow to green to black and brown. The eggs of the western flower thrips (Frankliniella occidentalis) are laid in leaves, flower petals and in the soft parts of stalks. Western flower thrips are about 1 mm long, with the female larger than the male. This is the reverse of injury susceptibility to western flower thrips, so in areas with mixed thrips populations growers cannot rely solely on plant selection to avoid damage. Eggs are inserted into young leaf, leaf stem or flower tissue singly, and the tip of one end of the egg remains visible at the surface. First instar larvae begin feeding on egg eclosion. Thrips are a major problem in greenhouse horticulture. Joe Funderburk, UF/IFAS Entomology Specialist. This species of thrips is native to the Southwestern United States but has spread to other continents, including Europe, Australia (where it was identified in May 1993), and South America via transport of infested plant material. The bodies of adult thrips can be yellow, orange, brown, or black. Biology, Life Cycle, and Behavior Depending on environmental conditions and nutrient levels, WFT females lay 150-300 eggs during their lifetime. WFT life cycle . A typical scenario plays out whereby a grower sees an alarming number of thrips feeding on flowers, and after some treatment (whether biological or chemical), the thrips disappear. These pests are complex and can be difficult to get under control if you do not completely understand their life cycle. The life cycle consists of five stages: egg, larval, prepupal, pupal and adult. Western flower thrips has a short life cycle and high female fecundity, which enhances the potential to develop resistance. 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