occidentaliswas main-tained on potted, flowering plants of the susceptible chrysanthemum cultivar Sunny Cassa in a greenhouse at258 C and70% relative humidity. The female makes an incision into the leaf, stem or fruit of plants with her serrated ovipositor and deposits a single egg. Photo: Thrips: www.gardentech.com Thrips are tiny insects that are mainly active at night. 106); however, the western flower thrips is the more important vector. Western Flower Thrips. Both viruses affect a wide range of plants, and often a single host plant may be infected by both viruses. Rearing of Western Flower Thrips.A culture ofF. Volatiles collected by entrainment of a solvent extract of F. ulmaria were more attractive than was the original extract. western flower thrips, Frankliniella occidentalis (Pergande), one of the most destructive insect pests of greenhouse-grown crops. The western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an important invasive pest that damages a range of horticultural and agronomic crops worldwide (Reitz 2009, Mouden et al. Onion thrips is a key pest of onions, but will also attack the young growth of capsicum, cucumbers and the flowers of some flower crops. Scarring on avocados. Western flower thrips, Frankliniella occidentalis, feeds in a piercing sucking manner and is a worldwide pest on many ornamental and vegetable crops. Western flower thrips feeds on apple, apricot, peach, plum, nectarine, orange, lemon, alfalfa, potato and numerous weed species. The behavioural responses of adult female western flower thrips, Frankliniella occidentalis (Pergande) to volatiles from meadow-sweet (Filipendula ulmaria), bay laurel (Laurus nobilis) and sage (Salvia officinalis) were investigated in laboratory bioassays. The maxillae then ingest the fluids from the cells, but not directly from the vascular tissue. This generally occurs in the compost or soil below the plant on which the larvae fed. The number of WFT on non-flowering plants was significantly lower than on flowering plants or single cut flowers. The western flower thrips [Frankliniella occidentalis (Pergande)] is an invasive pest insect in agriculture. The western flower thrips (Frankliniella occidentalis) is the most important vector for both tomato spotted wilt virus (TSWV) and impatiens necrotic spot virus (INSV). Plants were sampled primarily while in flower. Western Flower Thrips John P. Sanderson Introduction. 2005). Based on pesticide resistance studies, western flower thrips has various metabolic detoxification enzyme systems that could help it to overcome secondary plant defenses (Jensen 2000; Espinosa et al. Both viruses affect a wide range of plants, and often a single host plant may be infected by both viruses. Thrips can feed on different parts of the plant; leaves, stems, flowers and fruits. Damage. Damage includes feeding scars and leaf distortion (see Figures 9 and 10). Western flower thrips (WFT), Frankliniella occidentalis (Pergande), forms a key agri‐ and horticultural pest worldwide. Western flower thrips, the primary thrips species encountered by greenhouse producers, is extremely polyphagous, feeding on a wide-variety of horticultural crops grown in both commercial and research greenhouses. Small spider immatures (first and second instars) of several species were common on certain host plants, and are likely to feed on WFT. Other thrips will attach the following host plants - annual asters, dahlias, gladioluses, lilies, tuberous begonias and wax begonias. Western flower thrips can damage flowers, such as roses, with petal discoloration as a result of thrips feeding. Host Plants: This thrips feeds on almost any flowering plant. western flower thrips. 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 second most abundant predators were spiders (Araneae). Management. To avoid misunderstand-ings and misinterpretations, it is clear that the term “host plant” must be applied in the proper context. Western flower thrips have a broad host range of more than 500 species in 50 plant families and are associated with many cultivated crops and ornamentals. 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. 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