Pesticides are often used to control western flower thrips (Frankliniella occidentalis) in horticultural crops. 10. You can plant various flowers to attract beneficial insects that are natural predators to thrips. It feeds on a number of plants and occasionally damages tree fruit. In this region, western flower thrips damages not only apples but also many horticultural and field crops, such as tomatoes and cotton. h�b```b``]�������A���b�,k88��.��|?��P�CC�CNA"+_���؀������= '-��c8����#����+j����a^.��sm���T�x$MB>^a?��c����(V�Q��M�sв�?o=}۶�`�5_9㒚ژ9DV.V�:��z�����|��׶ؤ5.^��o`��ƴ���+--L3��D�- �L��H1 Western flower thrips attack a wide range of plants including: carnations, chrysanthemums, corn, cotton, cucumbers, eggplants, gerberas, grapes, impatiens, melons, peaches, peanuts, peas, and peppers. Thrips are small, slender insects, with four long, narrow wings fringed with hairs. • Spray tomatoes when numbers of adults or larvae exceed the action threshold. Wings are fringed on the margins and are clear to yellow in color. Western flower thrips Frankliniella occidentalis. Males are smaller than females (about 2/3 the female length) and are light yellow throughout their body. For flower thrips on gladiolus: Mix 1 tablespoon Lysol household cleaner with 1 gallon water. Western flower thrips, Frankliniella occidentalis P. (Thysanoptera: Thripidae) is a major agricultural and horticulture pest worldwide (Kirk, 2002; Kirk and Terry, 2003).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). Pre-pupa 6. Spray applications are only effective when thrips are actively feeding as larvae or adults. 117) and melon thrips (see Fact Sheet no. In sweet pepper, egg hatch gives the leaves a speckled appearance, with the degree of speckling corresponding to the number of hatched eggs. 0000020084 00000 n TSWV has a very wide host range, and the only thrips that transmits … Attacks a very wide range of vegetables, weeds and ornamentals; Insects are tiny and yellow to brown in colour; Can transmit a range of tospoviruses, including Tomato spotted wilt virus, which reduces tomato, capsicum, and eggplant quality and yield; Thrips - General Life Cycle . The western flower thrips were originally from the western US, but began to spread in the 1960s and are now a global pest. 1. Thrips has an additional weapon in its arsenal: the pupae are often in the soil. What are the western flower thrips, Frankliniella occidentalis? Eggs: Yellowish eggs … They are generally white when young but brown or black when mature. In the past 30 years, western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), has become one of the most important agricultural pests worldwide. 0000018222 00000 n Larvae rese… WFT damage potential is due not only to its ability to directly damage greenhouse-grown crops by feeding on leaves and flowers, but also because they may vector destructive tospoviruses. Many feed on plant tissues as well as pollen. 0000017756 00000 n Western flower thrips, Frankliniella occidentalis, are likely the most serious pest of greenhouse crops in the world. Nymphs are white or yellowish with small dark eyes. Direct damage results in lost yield and/or inferior prices, as damage is unsightly - common in roses, strawberries, beans, capsicum and cucumbers. 0000004759 00000 n These vary from pale yellow thorax and abdomen to yellow thorax and dark abdomen to … 0000001276 00000 n A threshold of 10 thrips per bloom is used in California. Western Flower Thrips' (WFT) function as a vector for the topsoviruses tomato spotted wilt virus (TSWV) and impatiens necrotic wilt virus (INWV). The females of F. williamsi are generally paler yellow with lighter-colored body setae than in the western flower thrips. WFT feed on plant tissue by rasping and sucking sap (Childers and Achor, 1995). These crops are grown outdoors but sheltered by clear polythene tunnels during the growing season from about April to October. trailer <]/Prev 532517>> startxref 0 %%EOF 105 0 obj <>stream In the following decades it has spread with the horticultural trade throughout North America and the world (Kirk and Terry 2003; CABI 2014). According to CABI (2014), its current distribution includes: Asia: China, Iran, Japan, Republic of Korea, Kuwait, Malaysia, and Sri Lanka Africa: Algeria, Kenya, Morocco, Reunion, Swaziland, Tunisia, Uganda, and Zimb… Western flower thrips Frankliniella occidentalis (Thysanoptera: Thripidae) Description: Western flower thrips are slender, very small insects, about 0.03 inch long when mature. Western flower thrips, formally limited to western North America, has become virtually cosmopolitan since the 1970s. Out-of-doors it is a pest of several field and vegetable crops and also tree fruits. So there's no time to lose! The eggs are inserted into soft plant tissues, including flowers, leaves, stems and fruit. 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. Pear thrips (Taeniothrips inconsequens) Western flower thrips (Frankliniella occidentalis) . The thrips don't like the cold and will rest in a hidden place at low temperatures. It feeds on a number of plants and occasionally damages tree fruit. In early spring, if overwintering sites are disturbed or dry up, thrips migrate to flowering trees and plants and deposit eggs in the tender portions of … 0000001788 00000 n Western flower thrips (WFT) are the most important insect pest of horticultural greenhouse-grown crops worldwide. Western Flower Thrips, Frankliniella occidentalis Frankliniella occidentalis, the western flower thrips, is a key pest of glasshouses, greenhouses and polytunnels.. Thrips can be difficult for growers to detect due to their small size and tendency for hiding within the concealed parts of the plant. ThresholdsWestern Flower Thrips There are no thresholds established for Ontario. c��XA���Lg��0�L9�,p:�eM^���O`�O���%�Kؗ�/a_���K�w tptptptptptp����5�d�=�5%�iܧ�ôuQ�����E��� 0 v�� endstream endobj 62 0 obj <> endobj 63 0 obj <>stream ���UA�O@1!%% �Pf` �3�]�� ��"� ����cS��/����� ���� �|�{�X �Xײ���gaA����SX�1�0F�=c��|��f�'�U��@�f2��{̠���8����"Ɖ���v&���~0�elf�a,C��k��"� (ƅS endstream endobj 58 0 obj <>>> endobj 59 0 obj <> endobj 60 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/Properties<>/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 61 0 obj <>stream The larval stage (see Figure 2) c… 0000007521 00000 n WFT have piercing-sucking mouthparts, but they do not feed exclusively in the phloem sieve tubes. Western flower thrips Frankliniella occidentalis (Thysanoptera: Thripidae) Description: Western flower thrips are slender, very small insects, about 0.03 inch long when mature. 0000054512 00000 n Western flower thrips are slender, about 0.03 inch (0.8 mm) long insects when mature. 0000005861 00000 n Western flower thrips (WFT), Frankliniella occidentalis, is still one of the most destructive insect pests of commercial greenhouses feeding on a wide variety of horticultural crops. Only those biological controls that target the adult female have any chance of reducing damage, and they must respond quickly when adult female thrips first move into the blossoms. A suggested limit is 25 thrips/ 50 fruit (PYO) and 5 thrips/ 50 fruit (shipping) in New Brunswick, in Quebec- 2- 10% of fruit with bronzing. 0000007081 00000 n Adults have 4 feathery wings and vary in color from yellow to dark brown; nymphs are … 0000004657 00000 n The antennae are eight segmented. Eggs: Yellowish eggs … shoots, buds, and flower … Banded wing thrips are also good predators. Adult western flower thrips are approximately 1-2 mm in length and generally yellowish-brown in colour. 0000062984 00000 n 0000057058 00000 n Thrips rasp the surface of the fruit as they feed, and … Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) originated in western North America and has since become a major pest of vegetables, fruit and ornamental crops across the US and around the world.F. Advertisement. Western flower thrips (WFT) are the most important insect pest of horticultural greenhouse-grown crops worldwide. The Situation: In southern California, the native western flower thrips (WFT) Frankliniella occidentalis is the most common vector responsible for transmission of an exotic plant virus, Tomato Spotted Wilt Virus (TSWV). WFT have piercing-sucking mouthparts, but they do not feed exclusively in the phloem sieve tubes. 0000005637 00000 n Description - Adult: male 0.9 to 1.1 mm long, female 1.3 to 1.4 mm. The apex of the second antennal segment is simple. Description, Biology, Life Cycle, Damage, Common Names, Images. However, these will attack only larval thrips and therefore are not effective for preventing the damage caused by the ovipositing female. There are a number of predators and parasites that attack western flower thrip. 0000012270 00000 n Western flower thrips adults are easily carried into glasshouses by wind, as well as on the clothes or in the hair of working personnel, thus making re-infestation from surrounding weeds a constant probability.

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