{"id":5320,"date":"2018-04-30T14:12:56","date_gmt":"2018-04-30T21:12:56","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=5320"},"modified":"2018-06-22T12:48:41","modified_gmt":"2018-06-22T19:48:41","slug":"a-thrips-coremothrips-pallidus-hood","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=5320","title":{"rendered":"A Thrips | Coremothrips pallidus Hood"},"content":{"rendered":"
California Pest Rating for<\/strong><\/h5>\n
Coremothrips pallidus <\/em><\/strong>Hood: a thrips<\/strong><\/h5>\n
Thysanoptera: Thripidae<\/strong><\/h5>\n
Pest Rating: A<\/strong><\/h5>\n

\u00a0<\/strong><\/p>\n

\n

\n

PEST RATING PROFILE<\/h5>\n
Initiating Event: <\/strong><\/h5>\n

Coremothrips pallidus<\/em> was recently reported to be established in Hawaii (Mound et al., 2017).\u00a0 It is currently Q-rated, and a permanent pest rating proposal is required to support an official pest rating.<\/p>\n

History & Status: <\/strong><\/h5>\n

Background:<\/u><\/strong> \u00a0Coremothrips pallidus<\/em> is a tiny (~1 mm in length), pale yellowish-white thrips (Hood, 1925).\u00a0 It has been found feeding on avocado leaves in Hawaii (Mound et al., 2017).\u00a0 Adults and larvae were found on Guettarda scabra<\/em> (Rubiaceae) in Guadeloupe, which suggests that this plant was being fed upon (Etienne et al., 2015).\u00a0 It has also been found on leaves of other plants in the families Bixaceae, Combretaceae, Sterculiaceae, and Ulmaceae, but it is not known if these records represent feeding (Cavalleri, 2015; Etienne et al., 2015; Goldarazena et al., 2012; Hood, 1925).<\/p>\n

Worldwide Distribution<\/u><\/strong>:<\/u><\/strong>\u00a0 Coremothrips pallidus<\/em> has been reported from Central America (Panama), South America (Brazil), and the Caribbean (Guadeloupe, Saint Vincent, and Trinidad) (Cavalleri, 2005; Etienne et al., 2015; Monteiro, 2002; Symbiota Collections of Arthropods Network).\u00a0 It was recently reported to be established on the islands of Hawaii and Oahu in Hawaii (Mound et al., 2017).<\/p>\n

Official Control:<\/u><\/strong> Coremothrips pallidus <\/em>is not known to be under official control anywhere.<\/p>\n

California Distribution: <\/u><\/strong>\u00a0Coremothrips pallidus<\/em> is not known to be present in California.<\/p>\n

California Interceptions:<\/u><\/strong>\u00a0 Coremothrips pallidus<\/em> has not been intercepted in California.<\/p>\n

The risk Coremothrips pallidus <\/em>wo<\/em>uld pose to California is evaluated below.<\/p>\n

Consequences of Introduction:<\/strong><\/h5>\n

1) Climate\/Host Interaction:<\/strong> Coremothrips pallidus<\/em> appears to feed on at least two species of plants, including avocado. Avocado is widely planted in southern California.\u00a0 However, this thrips is apparently restricted to tropical or subtropical areas.\u00a0 It is possible that it could become established in a limited portion of California.\u00a0 Therefore, Coremothrips pallidus <\/em>receives a Medium (2)<\/strong> <\/span>in this category.<\/p>\n

\u2013 Low (1) Not likely to establish in California; or likely to establish in very limited areas.<\/p>\n

\u2013 Medium (2) may be able to establish in a larger but limited part of California.<\/strong><\/span><\/p>\n

\u2013 High (3) likely to establish a widespread distribution in California.<\/p>\n

2) Known Pest Host Range: <\/strong>Although pallidus<\/em> has been reported from several plants species, only two of these plants are considered verified hosts here: Avocado (because the report specified that feeding had occurred) and Guettarda scabra<\/em> (because adults and larvae were found on this plant), representing two families. It is likely that some of the other plants in the families listed above (under Background) were also fed upon.\u00a0 Therefore, C. pallidus<\/em> receives a Medium (2)<\/span> <\/strong>in this category.<\/p>\n

\u2013 Low (1) has a very limited host range.<\/p>\n

\u2013 Medium (2) has a moderate host range.<\/strong><\/span><\/p>\n

\u2013 High (3) has a wide host range.<\/p>\n

3) Pest Dispersal Potential:<\/strong> Coremothrips pallidus<\/em> has wings and presumably flies.\u00a0 It could also be dispersed artificially via transport of infested plant material.\u00a0 Lastly, it may be capable of wind-aided dispersal.\u00a0 Therefore, it receives a Medium (2)<\/span> <\/strong>in this category.<\/p>\n

\u2013 Low (1) does not have high reproductive or dispersal potential.<\/p>\n

\u2013 Medium (2) has either high reproductive or dispersal potential.<\/strong><\/span><\/p>\n

\u2013 High (3) has both high reproduction and dispersal potential.<\/p>\n

4) Economic Impact:<\/strong> Coremothrips pallidus<\/em> has been reported to feed on avocado, which is an important crop in California.\u00a0 If this species was established in California, it is possible that it could lower the value of avocados.\u00a0 Therefore, it receives a Low (1)<\/span> <\/strong>in this category.<\/p>\n

Economic Impact: B<\/span><\/strong><\/p>\n

A. The pest could lower crop yield.<\/p>\n

B. The pest could lower crop value (includes increasing crop production costs).<\/strong><\/span><\/p>\n

C. The pest could trigger the loss of markets (includes quarantines).<\/p>\n

D. The pest could negatively change normal cultural practices.<\/p>\n

E. The pest can vector, or is vectored, by another pestiferous organism.<\/p>\n

F. The organism is injurious or poisonous to agriculturally important animals.<\/p>\n

G. The organism can interfere with the delivery or supply of water for agricultural uses.<\/p>\n

Economic Impact Score: 1<\/span><\/strong><\/p>\n

\u2013 Low (1) causes 0 or 1 of these impacts.<\/strong><\/span><\/p>\n

\u2013 Medium (2) causes 2 of these impacts.<\/p>\n

\u2013 High (3) causes 3 or more of these impacts.<\/p>\n

5) Environmental Impact:<\/strong> Coremothrips pallidus<\/em> feeds on plants in at least two families. If this species became established in California, it would encounter plants that are not present in the area of its current distribution.\u00a0 If it fed on these plants, it is possible that this thrips could have an impact on natural communities.\u00a0\u00a0\u00a0 Therefore, it receives a Medium (2)<\/span><\/strong> in this category.<\/p>\n

Evaluate the environmental impact of the pest on California using the criteria below.<\/p>\n

Environmental Impact: A<\/span><\/strong><\/p>\n

A. The pest could have a significant environmental impact such as lowering biodiversity, disrupting natural communities, or changing ecosystem processes.<\/strong><\/span><\/p>\n

B. The pest could directly affect threatened or endangered species.<\/p>\n

C. The pest could impact threatened or endangered species by disrupting critical habitats.<\/p>\n

D. The pest could trigger additional official or private treatment programs.<\/p>\n

E. The pest significantly impacts cultural practices, home\/urban gardening or ornamental plantings.<\/p>\n

Score the pest for Environmental Impact. Score:<\/p>\n

Environmental Impact Score: 2<\/span><\/strong><\/p>\n

\u2013 Low (1) causes none of the above to occur.<\/p>\n

\u2013 Medium (2) causes one of the above to occur.<\/strong><\/span><\/p>\n

\u2013 High (3) causes two or more of the above to occur.<\/p>\n

Consequences of Introduction to California for Coremothrips pallidus<\/em>: Medium (9)<\/span><\/strong><\/h5>\n

Add up the total score and include it here.<\/p>\n

\u2013Low = 5-8 points<\/p>\n

\u2013Medium = 9-12 points<\/strong><\/span><\/p>\n

\u2013High = 13-15 points<\/p>\n

6) Post Entry Distribution and Survey Information:<\/strong> Coremothrips pallidus<\/em> is not known to occur in California.\u00a0 It receives a Not established (0)<\/span><\/strong> in this category.<\/p>\n

\u2013Not established (0) Pest never detected in California, or known only from incursions.<\/strong><\/span><\/p>\n

\u2013Low (-1) Pest has a localized distribution in California, or is established in one suitable climate\/host area (region).<\/p>\n

\u2013Medium (-2) Pest is widespread in California but not fully established in the endangered area, or pest established in two contiguous suitable climate\/host areas.<\/p>\n

\u2013High (-3) Pest has fully established in the endangered area, or pest is reported in more than two contiguous or non-contiguous suitable climate\/host areas.<\/p>\n

Final Score:<\/strong><\/h5>\n

7) The final score is<\/strong> the consequences of introduction score minus the post entry distribution and survey information score: Medium (9)<\/span><\/strong><\/p>\n

Uncertainty:<\/strong><\/h5>\n

Coremothrips pallidus<\/em> is fairly widely distributed, and yet there do not appear to be any reports of this species being a pest.\u00a0 It is therefore possible that this proposal is overly pessimistic and this thrips may not become a problem even if it was established in California. Some thrips are vectors of plant viruses, and it is possible (though no reports were found of C. pallidus<\/em> vectoring diseases) that this species could transmit virus diseases of avocado if it was established in California.<\/p>\n

Conclusion and Rating Justification:<\/strong><\/h5>\n

Coremothrips pallidus<\/em> is a plant-feeding thrips that attacks avocado and is not known to be present in California.\u00a0 If it became established in this state, it could impact avocado cultivation and could also have environmental impacts.\u00a0 For these reasons, an \u201cA<\/strong>\u201d rating is justified.<\/p>\n

\n
References: <\/strong><\/h5>\n

Cavalleri, A.\u00a0 2005.\u00a0 Comunidades de tripes (Insecta: Thysanoptera) em flores e ramos, com \u00eanfase em Asteraceae, no Parque Estadual de Itapu\u00e3, Vlam\u00e3o, RS.\u00a0 Ph.D. dissertation.\u00a0 Instituto de Bioci\u00eancias da Universidade Federal do Rio Grande do Sul, Porto Alegre.<\/p>\n

Etienne, J., Ryckewaert, P., and B. Michel.\u00a0 2015.\u00a0 Thrips (Insecta: Thysanoptera) of Guadeloupe and Martinique: Updated check-list with new information on their ecology and natural enemies.\u00a0 Florida Entomologist.\u00a0 98(1): 298-304.<\/p>\n

Goldarazena, A., Gattesco, F., Atencio, R., and C. Korytowski.\u00a0 2012.\u00a0 An updated checklist of the Thysanoptera of Panama with comments on host associations.\u00a0 Check List.\u00a0 8(6): 1232-1247.<\/p>\n

Hood, J.D.\u00a0 1925.\u00a0 New neotropical Thysanoptera collected by C.B. Williams.\u00a0 1925.\u00a0 Psyche.\u00a0 32: 48-69.<\/p>\n

Monteiro, R.\u00a0 2002.\u00a0 The Thysanoptera fauna of Brazil.\u00a0 Pages 325-340 in R. Marullo and L. Mound, editors.\u00a0 Thrips and Tospoviruses: Proceedings of the 7th<\/sup> International Symposium on Thysanoptera.\u00a0 Australian National Insect Collection, Canberra.\u00a0 390 pp.<\/p>\n

Mound, L.A., Matsunaga, J.N., Bushe, B., Hoddle, M.S., and A. Wells.\u00a0 2017.\u00a0 Adventive Thysanoptera species in the Hawaiian Islands: New records and putative host associations.\u00a0 Proceedings of the Hawaiian Entomological Society.\u00a0 49: 17-28.<\/p>\n

Symbiota Collections of Arthropods Network.\u00a0 Accessed 13 November 2017.\u00a0 http:\/\/scan1.acis.ufl.edu<\/a><\/p>\n

\n
Author:<\/h5>\n

Kyle Beucke, 1220 N Street, Room 221, Sacramento, CA, 95814, 916-403-6741; plant.health[@]cdfa.ca.gov.<\/p>\n

Responsible Party:<\/strong><\/h5>\n

Jason Leathers, 2800 Gateway Oaks, Sacramento CA 95833, (916) 654-1211, plant.health[@]cdfa.ca.gov<\/p>\n

\n
Comment Period:* CLOSED<\/span><\/h5>\n

4\/30\/18 \u2013 6\/14\/18<\/p>\n

\n
*NOTE:<\/span><\/h5>\n

You must be registered and logged in to post a comment. \u00a0If you have registered and have not received the registration confirmation, please contact us at\u00a0plant.health[@]cdfa.ca.gov.<\/p>\n

\n
Comment Format:<\/h5>\n

\u2666 \u00a0Comments should refer to the appropriate California Pest Rating Proposal Form subsection(s)\u00a0being commented on, as shown below.<\/p>\n

Example Comment:
\n<\/strong>Consequences of Introduction: \u00a01. Climate\/Host Interaction:\u00a0[Your comment that relates to \u201cClimate\/Host Interaction\u201d here.<\/em>]<\/p>\n

\u2666 \u00a0Posted comments will not be able to be viewed immediately.<\/p>\n

\u2666 \u00a0Comments may not be posted if they:<\/p>\n

Contain inappropriate language which is not germane to\u00a0the pest rating proposal;<\/p>\n

Contains defamatory, false, inaccurate, abusive, obscene, pornographic,\u00a0sexually oriented, threatening, racially offensive, discriminatory or illegal\u00a0material;<\/p>\n

Violates agency regulations prohibiting sexual harassment or other forms\u00a0of discrimination;<\/p>\n

Violates agency regulations prohibiting workplace violence, including threats.<\/p>\n

\u2666 \u00a0Comments may be edited prior to posting to ensure they are entirely germane.<\/p>\n

\u2666 \u00a0Posted comments shall be those which have been approved in content and posted to the\u00a0website to be viewed, not just submitted.<\/p>\n

\n

Pest Rating: A<\/strong><\/h3>\n

 <\/p>\n

\n

Posted by ls\u00a0<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

California Pest Rating for Coremothrips pallidus Hood: a thrips Thysanoptera: Thripidae Pest Rating: A \u00a0 PEST RATING PROFILE Initiating Event: Coremothrips pallidus was recently reported to be established in Hawaii (Mound et al., 2017).\u00a0 It is currently Q-rated, and a permanent pest rating proposal is required to support an official pest rating. History & Status: … Continue reading A Thrips | Coremothrips pallidus Hood<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":325,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[669,5,26],"tags":[],"class_list":["post-5320","post","type-post","status-publish","format-standard","hentry","category-a-rated","category-entomology","category-thysanoptera"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5l8vQ-1nO","jetpack-related-posts":[{"id":9593,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=9593","url_meta":{"origin":5320,"position":0},"title":"Thrips maculicollis (Hood): a thrips","author":"Kyle Beucke","date":"February 18, 2022","format":false,"excerpt":"California Pest Rating for Thrips maculicollis (Hood): a thripsPest Rating: A download pest rating *NOTE You must be registered and logged in to post a comment. 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