Several species of thrips can infest greenhouse floral crops, but the most severe and common pest in recent years has been the western flower thrips (WFT), . Western flower thrips, Frankliniella occidentalis, are likely the most serious pest of greenhouse crops in the world. Adults have 4 feathery wings and vary in color from yellow to dark brown; nymphs are white or pale with small dark eyes. thrips (Fig. Western flower thrips (WFT) cause significant financial losses for strawberry growers in the United Kingdom. However, the recently introduced western flower thrips (WFT) (Frankliniella occidentalis) is a significant threat to peanuts.) in SF 120, HL01107; Raffle et al. The main aim of this study was to test whether mass trapping could reduce damage and to predict whether this approach would be economically viable. Topsoviruses have over 600 plant species hosts. Primary economic damage is due to Western Flower Thrip’s (WFT) function as a vector for the topsoviruses tomato spotted wilt virus (TSWV) and impatiens necrotic wilt virus (INWV). Thrips feeding on strawberry blossoms cause the stigmas and anthers to turn brown and wither prematurely, but not before fertilization has occurred. Successful IPM programmes for management of western flower thrips (WFT), Frankliniella occidentalis, on UK strawberry crops have been developed using knowledge of its biology and behaviour (Bennison & Fitzgerald . Since male WFT do Thrips cause injury to lettuce by puncturing leaves and sucking the plant sap . Western Flower Thrips John P. Sanderson Introduction. Flower Thrips Flower thrips damage crops through feeding and oviposition, which result in deformation of growing tissues and lead to yield losses in harvested fruits and vegetables, as well as esthetic damage to flowers. Thrips also spoil fruit finish by rasping the surface while feeding and by puncturing the fruit while laying eggs. They attack leaves, leaf buds, and very small squares, causing a silvering of the lower leaf surface, deformed or blackened leaves, and loss of the plant terminal (Fig. Pear thrips (Taeniothrips inconsequens) Western flower thrips (Frankliniella occidentalis) Pest description and crop damage Adult western flower thrips (WFT) are very small (about 0.04 inch long at maturity), slender insects with fringed wings. Because of thrips In the past 30 years, western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), has become one of the most important agricultural pests worldwide. The most common species of plant-feeding thrips in Texas cotton include flower thrips, onion thrips, and western flower thrips. 1, 2010 Western Flower Thrips on Table Grapes every two weeks until 2001-04-10. They are usually found in flowers. Damage Apple - White to pink irregular areas called pansy spots develop around egg punctures in young apple Florida Entomologist 92: … It causes damage and spoilage to a vast number of economically important plant species through feeding, oviposition and spread of several plant diseases, most notably tospoviruses (Morse and Hoddle, 2006 ). or halo spotting. Western flower thrips: cotton, navy bean, mungbean, sunflower, canola and peanuts. J. Enol. Western flower thrips (WFT) Frankliniella occidentalis continues to be a serious pest of floriculture crops in New England. Generally, any direct damage is overshadowed by the impact of TSWV transmission in tomato. Adults are winged and capable of drifting long distances in the wind. Thrips can be difficult for growers to detect due to their small size and tendency for hiding within the concealed parts of the plant. Greenhouse thrips and western flower thrips are two common pest species in landscapes. Western flower thrips, Frankliniella occidentalis P. (Thysanoptera: Thripidae) is a major agricultural and horticulture pest worldwide (Kirk, 2002; Kirk and Terry, 2003). Montdorensis predatory mites feed on both thrips and whitefly, and they are proving to be a very effective biological control agent for these pests in protected crops. damage.37 Purified cystatin and equistatin, when incorporated intoartificialdiets,reducedWFTovipositionrates. Thrips have spread throughout the horticulture industry on plugs, cuttings, and small plants. Thrips By Susan Jones Many species of thrips feed on orchids; some of the most common include western flower thrips (Frankliniella occidentalis), Cuban laurel thrips (Gynaikothrips ficorum), greenhouse thrips (Heliothrips haemorrhoidalis) and flower thrips (Frankliniella bispinosa). This factsheet provides This factsheet provides information on the pest, the damage it causes to strawberries and the results of AHDB funded research in Projects SF 80, SF 90, SF A number of thrips species can affect peanuts but their damage is minor and infrequent and should not be a problem in irrigated crops. Damage can be reduced by growing barriers of nonhost plants around crops and by eliminating reservoir plants, plants to which the thrips are especially attracted, such as jimson weed . , 2015; Reitz Characteristics for to identify onion and western flower thrips from western flower thrips again averaged a significantly higher damage rating(F 91.125, df 1 and 6, P 0.0001) of 3.7 compared with 2.8 for tobacco thrips populations. Whole plant and leaf bioassays were used to compare silver damage of WFT to TG and control plants. Chlorogenic acid Vitic., Vol. The western flower thrips (Frankliniella occidentalis) develops in six stages: egg, two larval instars, prepupa, pupa, and finally the adult insect. Insecticides – Pest Engineering 356 in 2006 to ornamentals caused primarily by western flower thrips damage exceeded US$ 15 million. Damage Adults and nymphs infest the underside of cotyledons, young leaves and growing points, rasp the plant surface and suck out the cell contents: Pansy spot caused by western flower thrips (E. Beers, July 2007) Feeding damage is usually more severe on stone fruits Western flower thrips are slender, very small insects, about 0.03 inch long when mature. Western Flower Thrips (Frankliniella occdentalis) in Tree Fruit March, 2016 Hosts Many woody and herbaceous plants. effect on western flower thrips (WFT), Frankliniella occidentalis , a serious pest of tomato plants worldwide. Thrips are very small, slender insects with mouthparts specialised for sucking and rasping. The six spotted thrips is pale yellow with three dark spots on each of its forewing and the black hunter is black with two clear bands across its wings. The damage is more conspicuous on the 51 S. Afr. Although often numerous on berries when cat-facing occurs, western flower thrips do not cause cat-facing, which is a result of lygus bug feeding and possibly other factors. 4). Western Flower Thrips, Frankliniella occidentalis Frankliniella occidentalis , the western flower thrips, is a key pest of glasshouses, greenhouses and polytunnels. Western flower thrips feed on lettuce and vector plant viruses. Clearly, these economic assessments show that the western flower thrips is one of the most 31, No. 2008 in AHDB project SF 80; Harnden et al . Certain biological attributes of this insect predispose it to be a direct pest across a wide range of crops. Western flower thrips have a very large host range that includes many vegetables. In Michigan, western flower thrips are most visible as a pest in peach, where late season feeding by thrips results in “silvering” and defuzzing of peaches in the weeks leading up to harvest. The eggs of the western flower thrips (Frankliniella occidentalis) are laid in leaves, flower petals and in the soft parts of stalks. 38 Transgenic chrysanthemums, overexpressing multicystatin, a potato pro- Tomato spotted wilt virus (TSWV) is transmitted exclusively by thrips and especially by western flower thrips and Frantz G, Mellinger HC. The western flower thrips Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) is a cosmopolitan, polyphagous insect pest that causes bronzing to fruit of strawberry (Fragaria x ananassa). is a significant threat to peanuts. They cause damage with their feeding and they are very effective vectors of tomato spotted wilt virus. The traps were removed in the winter, as rain and cold rendered the sticky traps ineffective. Punctured leaves take on a silvery appearance that eventually turns to brown scarring and can be confused with windburn or blown sand damage. 7). Adults are 1-2 mm long, and most have a pair of narrow wings fringed with long hairs. Most pest thrips feed while hidden, often in buds and shoot tips or beneath sepals; you’ll often observe the damage before seeing the thrips. WFT damage plants directly by feeding, and indirectly by acting as vectors for the tospoviruses impatiens necrotic spot virus (INSV) and tomato spotted wilt virus (TSWV). Western flower thrips are a year-round pest, but are less destructive during wet weather. Shifts in western flower thrips, Frankliniella occidentalis (Thysanoptera: Thripidae), population abundance and crop damage. Flower thrips damage crops through feeding and oviposition, which result in deformation of growing tissues and lead to yield losses in harvested fruits and vegetables, as well as esthetic damage to flowers (Lewis 1997). Damage. 2009. 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