In the United States, USDA-APHIS inspectors at various ports-of-entry have intercepted S. dorsalis 89 times since 1984 on imported plant materials belonging to 48 taxa, and most frequently on cut flowers, fruits and vegetables. Worldwide Distribution: Scirtothrips dorsalis is believed to be native to South-East Asia or the Indian subcontinent4. Post Entry Distribution and Survey Information, http://www.bioone.org/doi/pdf/10.1653/024.095.0134, http://www.biosecurity.govt.nz/files/regs/imports/risk/table-grapes-china-ra.pdf, Pest Ratings and Mitigating Actions, Section 3162 (PDF), Pest Rating Proposal Form (Word Document), Common Names of Insects and Related Organisms, The Jepson eflora: Most recent manual of California plants with up-to-date names, CalWeedMapper: Maps showing distribution and status of California weeds, Calflora: Localities of California plants, including weeds, The Consortium of California Herbaria: Information and interactive mapping of vouchered California plant occurrences, Gallery of Pests | Global Invasive Species Team – The Nature Conservancy. D.  The pest could trigger additional official or private treatment programs. 5)  Environmental Impact: Munz’s onion (Allium munzii), Yosemite onion (Allium yosemitense), and small-leaved rose (Rosa minutifolia) are listed as threatened or endangered plants in California and are potential hosts of Scirtothrips dorsalis. trailer Before its detection in the continental U.S., Chilli Thrips were considered a serious economic pest in Asia and Australia where it attacked crops such as strawberries, tea, citrus, cotton, soybeans, chilies, castor beans, peanuts, and roses among others. A “B” rating is justified. Chilli Thrips prefer young leaves, buds, and fruit. In addition, they also reduce food consumption of thrips, resulting in limited feeding damage. E.  The pest significantly impacts cultural practices, home/urban gardening or ornamental plantings. 0000001397 00000 n New Zealand Kiwifruit Vine Health Inc.  http://www.kvh.org.nz/vdb/document/91534, 5EPPO Data Sheets on Quarantine Pests:  Scirtothrips dorsalis. The pest can vector, or is vectored, by another pestiferous organism. %%EOF startxref (Tylenchida: Allantonematidae), have been reported to effectively control field populations of Chilli Thrips. California Interceptions:  Scirtothrips dorsalis is occasionally intercepted on plants or fresh plant parts from Florida, Texas, and Hawaii. – High (3) causes 3 or more of these impacts. After two molts, the larva enters the pre-pupal stage (lasts about 1 day) during which wing buds are developing externally. Climate/Host Interaction: [Your comment that relates to “Climate/Host Interaction” here.]. 30 0 obj <> endobj The eggs hatch in 6–8 days. Because Orius insidiosus also feeds on aphids, mites, moth eggs and pollen, its population does not decline strongly even if thrip populations are drastically reduced. ... Life cycles are the slowest at the upper and lower temperature extremes (Schall 1995), and Scirtothrips dorsalis is capable of over wintering in the soil or protected in plant parts in the adult stage (Venette and Davis 2004). California Distribution:  Scirtothrips dorsalis has only been found in the environment of California in Orange and Los Angeles counties. Chilli Thrips prefer young leaves, buds, and fruit. Chilli Thrips create damaging feeding scars, distortions of leaves, and discolorations of buds, flowers, and young fruits by feeding on the meristems of the host plant's terminals and on other tender parts above the soil surface. The thrips is reported to disperse only 12-20m on its own1, but it may spread long distance in commerce on plants or plant parts. – Medium (2) has either high reproductive or dispersal potential. Adults have dark wings and dark bands across their abdomen. –Low = 5-8 points Host Plant: Scirtothrips dorsalis is a polyphagous species with more than 100 recorded hosts from about 40 different families. Scirtothrips dorsalis is capable of producing continual generations per year, Scirtothrips dorsalis typically undergo 4-8 generations per year (Venette and Davis 2004). xref H��TMs�0��W�Q��7��ʼn�(L�.��I���&�N���,'N�ǁd&R��۷OO;y5�p�e߳���!���B����? Official Control: Scirtothrips dorsalis is considered a quarantine pest in Europe5 and New Zealand6. Common damage includes browning, bronzing or blackening of infested plant parts, stains and scars may also occur. – Medium (2) may be able to establish in a larger but limited part of California. Temperature and moisture influence the number of generations that may occur per year. – Low (1) causes 0 or 1 of these impacts. Females are capable of reproducing without mating, also known as parthenogenesis. Evaluation of Neoseiulus cucumeris and Amblyseius swirskii (Acari: Phytoseiidae) as biological control agents of chilli thrips, Scirtothrips dorsalis (Thysanoptera: Thripidae), on pepper. 2009. Score: – Low (1) causes none of the above to occur. Host Plant: Scirtothrips dorsalis is a polyphagous species with more than 100 recorded hosts from about 40 different families. History: In the United States, USDA-APHIS inspectors at various ports-of-entry have intercepted S. dorsalis 89 times since 1984 on imported plant materials belonging to 48 taxa, and most frequently on cut flowers, fruits and vegetables. The two larval stages are completed in eight to t… Biological Control 49:91-96. The eggs are microscopic (0.075 mm long and 0.070 mm wide), kidney-shaped and creamy white in color (Seal et al. – High (3) causes two or more of the above to occur. Female S. dorsalis insert their eggs inside plant tissue. –Low (-1) Pest has a localized distribution in California, or is established in one suitable climate/host area (region). Scirtothrips dorsalis receives a High (3) in this category. h�b```�K�Bz� ce`a�8���������ʰa��� §�xE��***�y~L+ �GC�����=ˣ�/��.�Y����p��!��Z��,�kw�o���+]�2|Jσ���/n��ڳ$���ŷ��>JV�@%J@*�H70��W�(&u0�Z�e��2��W�ʡv��*�H���b���2Y�B�#��&0�1NbRe�aRff�f8���x�s�1��*�"�,OX]'�:����� @̌LbP��0��iN��7�b� �Z�d_Xs�%G0��� R��� $� ����` �m? Evaluate the natural and artificial dispersal potential of the pest. The thrips Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) is an invasive pest that poses a significant economical threat to U.S. agriculture and trade. MAF Biosecurity New Zealand. As chilli thrips is considered to be a quarantine pest by New Zealand and Europe, the presence of this insect in California may trigger a loss of markets. 1. Synonym(s): Yellow Tea Thrip Life History: The life cycle is similar to western flower thrips, with the entire life cycle complete within 14 to 20 days. 0000001592 00000 n Scirtothrips dorsalis is already established in other states, has been proposed for deregulation by USDA, and is not known to be under consideration for FRSMP.