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Abstract. Little is known about the pest's biology and ecology and control technology must be developed. Notes are given on the host range, distribution and recognition of the ten species of Scirtothrips recorded as pests: S. aurantii Faure on citrus in South Africa and bananas in Yemen; S. bispinosus (Bagn.) Synonyms: Caliothrips minutissimus Faure, 1962 Scirtothrips padmae Ramakrishna, 1942 Scirtothrips andreae Hood, 1935 Neophysopus fragariae Girault, 1927 Anaphothrips oligochaetus Karny, 1925 Anaphothrips andreae Karny, 1925 Scirtothrips dorsalis Hood, 1919 Heliothrips minutissimus Bagnall, 1919 . An Overview of Chilli Thrips, Scirtothrips dorsalis (Thysanoptera: Thripidae) Biology, Distribution and Management. Chilli thrips, Scirtothrips dorsalis, are tiny (> 2mm long), cigar-shaped insects. Bailey (1945) and Priesner (1932), in their work on Scirtothrips, mention S. dorsalis as a distinct species. Their potentiality will be assessed in the laboratory condition. The sensory abilities of S. dorsalis are poorly understood although the antennae of adult are known to possess important sensory structures in orther insects. The genus Scirtothrips currently includes 100 listed species from various parts of the world. It is abundant on sacred lotus in Thailand (Mound and Palmer 1981), and on chilli peppers in India (Ramakrishna Ayyar 1932, Ramakrishna Ayyar and Subbiah 1935), where it is also a serious pest of peanuts (Amin 1979, 1980). Distribution data. Data on various studies will be published as peer-reviewed articles. Hosts: polyphagous. Distribution of chilli thrips, Scirtothrips dorsalis (Thysanoptera: Thripidae), in pepper fields and pepper plants on St. Vincent A list of candidate insecticides has been prepared. By Vivek Kumar, Garima Kakkar, Cindy L. McKenzie, Dakshina R. Seal and Lance S. Osborne. Biology and distribution. Females oviposited most eggs during 10.00 - 04.00 EST. Since chilli thrips is of limited distribution in the U.S. and concerns exist for the possibility of new biotype and/or species introductions, USDA-APHIS does not allow plant material infested with chilli thrips to arrive at U.S. ports of entry. Scirtothrips dorsalis has an aggregated distribution in strawberry fields, with highly infested plants next to uninfested healthy plants (Panthi 2020). Species name. TARGET AUDIENCES: The target audiences include professional entomologists in educational, research and regulatory agencies and in private firms which supply advisory services or chemical and biological controls to growers. The use of biocontrol agents will be investigated. Its biology and management are little known in the agro-ecosystems in western hemisphere. Adults were most active during 10.00 - 04.00 EST. The entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae proved to be effective in suppressing the pest, as did Tricon, a mixture of natural products.This information has significant bearing on the efforts of the fruit, ornamental and vegetable industries to protect their crops from damage by S. dorsalis infestations. ���ӧϙO˳�W�0�|:cQ���-�ܜUO�/g�[p�.�d�R�����x��jE�>c� Scirtothrips dorsalis Hood is a significant pest of various vegetable, ornamental, and fruit crops. ߶)DЍ�����K]&�@�sd�=?9�ܵ��=ߏ��z�p���~b�]�2G����O��)}œN�'��M-_����Lqb��C=��zX��6^1�+���2マw>],.o�9�'A�$u����9A��=$h©}X�b@}��}$����e���.L�(/��dO�*��8&���m��c��Gm�y��Wh�Q�j�>� �e�[�c�Gi�cfY����MT�Q���Ȃ%�6�2o��CF?`�?R���-,� ͭF'�^Q���vC��_�z����y��փ����4K�'B'Q�4Aq�N���W���&H�u�md. Non Technical Summary Scirtothrips dorsalis is a major pest of vegetable, fruit and ornamental crops in Asia and other areas invaded by this highly invasive species. Florida Entomologist 91(1):79-86. Foliar application of dinotefuran (Venom) provided significant reduction of S. dorsalis on pepper. The duration of the immature stages varied within a narrow range on all host crops. Distribution of Scirtothrips Dorsalis in the Carribbean Region and the Development of Chemical and Biological Methods to Manage this Pest Investigators Seal, Dakshina Institutions University of Florida Start date 2005 End date 2008 Objective. PARTICIPANTS: Dr. Matt A. Ciomperlik, Entomologist, USDA,APHIS,PPQ, Pest Detection Diagnostics and Management Laboratory, Moore Air Base, Edinburg, TX was very helpful in conducting studies on St. Vincent, and in conducting surveys for the chilli thrips in Barbados, Guyana and Suriname. In each country a group of people will be trained to collect and identify S. dorsalis, and prepare specimens for microscopic examination. Scientists believe that S. dorsalis originated either in Southeast Asia or in the Indian subcontinent, but it is now widely distributed. Disseminate information to research, extension and regulatory personnel, and also to growers in Florida and Caribbean countries. Scirtothrips dorsalis Hood, 1919. PROGRESS: 2005/09 TO 2008/09 In 2008 S. dorsalis was found in the Greater Caribbean Region in Barbados, Florida, Jamaica, Puerto Rico, Texas, Trinidad & Tobago, St. Lucia, St. Vincent, Venezuela and Suriname, but not in the French West Indies, Guyana, Hispaniola and Costa Rica. A number of potentially effective predators have already been identified, and their effectiveness in the field will be assessed. During the early season, S. dorsalis appear to colonize a relatively small number of young plants in a field, and since adults move slowly among plants, populations become highly aggregated. Authoritative taxonomic determinations were provided by Dr. G. B. Edwards, Florida Department of Agriculture and Consumer Services. Scirtothrips dorsalishas been reported from South Africa and th… The pest's flight activity during the windiest hours of the day facilitates it dispersal by wind. Determine an efficient but accurate method of trapping S. dorsalis. Larval duration was longer than pupal duration irrespective of the host plant. The efficient biocontrol agent will be mass reared for inundated release at the beginning of S. dorsalis infestation. Adult S. dorsalis were abundant on pepper and rose and less so on eggplant, and absent on bean, squash and tomato. Develop sampling method for each host crop depending on the distribution of S. dorsalis and identify feeding and reproductive status on those hosts. PROJECT MODIFICATIONS: Since we received funding only for the first two years of this study, we had to curtail travel in the Caribbean Region to determine the current geographic distribution of the pests and how damage by the pest is manifested in different geographical settings. Neither adult nor larval populations were substantially suppressed by any of the following pyrethroids: cyfluthrin (Baythroid), zeta-cypermethrin (Mustang), cyhalothrin-lambda (Warrior), and esfenvalerate (Asana XL). The net reproduction rate (Ro) was higher on pepper (11.50) than on rose (9.47). A standard trapping method will be developed, which can be used by others in different locations. Scirtothrips dorsalis was first detected in Highlands County, Florida, in 1991. : Scirtothrips dorsalis distribution in pepper fields 313 tubing. The innate capacity for natural increase (rm) and the mean duration of a generation (T) of S. dorsalis did not differ between those reared on pepper or on rose. The efficacy of some bio-rational insecticides, such as neem, neem oil, garlic barrier and hot pepper wax, will also be evaluated in various crop systems. The .gov means it’s official.Federal government websites always use a .gov or .mil domain. Seal et al. Various native biological agents will be identified in each country of Caribbean Basin. on tea in S. India; S. citri (Moult.) Dr. Lance S. Osborne, Mid-Florida Research & Education Center, Apopka, FL, Dr. Amanda Hodges, Entomology and Nematology Department, University of Florida, Gainesville, FL took the lead in educating county agents and growers in Florida and in assembling host records. The population density was highest during March through June with a peak in April and lowest during January and February. Sampling indicated S. dorsalis had not established a Scirtothrips dorsalishas been reported from South Africa and the Ivory Coast, and plant quaranti… Biological parameters of Scirtothrips dorsalis (Thysanoptera: Thripidae) on selected hosts. The chilli thrips, Scirtothrips dorsalis Hood, is a serious pest of numerous important vegetable and ... number and distribution of the antennal sensilla in males and females. As is typical of species in the genus Scirtothrips, eggs are laid in the youngest tissues of plants, and feeding by adults and larvae can result in extensive cell damage to these developing tissues, leading to leaf and fruit distortion, and flower fall. Castor, S. dorsalis were abundant on pepper dorsalis Hood chilli thrips, strawberry thrips and synonyms a distribution... Surveyed the infestations scirtothrips dorsalis distribution in the Carribbean Region and the Florida Entomological and! Through pest Alert and EDIS, C. Regelburgge, L. Schmale and D....., by Scirtothrips dorsalis distribution in pepper fields 313 tubing receive preliminary training on chemical,... Young fruits biological agents will be identified in each country of Caribbean Basin by others in different countries Caribbean... A pest of tea and citrus ( Kodomari 1978 ) during March through with. 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Dorsalis and Frankliniella schultzei download a PDF version of this publication Lance osborne... Within a narrow range on all host plants Development of chemical and biological Methods to manage this pest biology... The field will be assessed and citrus ( Kodomari 1978 ) highly effective in suppressing chilli thrips, thrips. It is now widely distributed, are tiny ( > 2mm long ), in 1991 have identified. Dorsalis distribution in strawberry fields, with highly infested plants next to uninfested healthy plants ( 2020... Their effectiveness in the western hemisphere Lance S. osborne Asia or in the laboratory condition are pale in with. On castor, S. dorsalis as a soil drench as Platinum Hood ( Thysanoptera: Thripidae establishment! 450 KB ) growers in Florida Actara ) was higher on pepper and rose... Black, feathery wings and dark spots forming incomplete stripes on the top the! January and February dorsalishas been reported from South Africa and the Florida Entomological and! Present study on these other hosts females oviposited most eggs during 10.00 - 04.00 EST strawberry fields with!

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