{"id":5168,"date":"2018-04-13T12:09:28","date_gmt":"2018-04-13T19:09:28","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=5168"},"modified":"2018-08-27T11:54:06","modified_gmt":"2018-08-27T18:54:06","slug":"beetle-dyscinetus-dubius","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=5168","title":{"rendered":"Beetle | Dyscinetus dubius"},"content":{"rendered":"
California Pest Rating for<\/h5>\n
Beetle | Dyscinetus dubius <\/em>(Olivier)<\/h5>\n
Coleoptera: Scarabaeidae<\/h5>\n
Pest Rating: A<\/h5>\n
\n

PEST RATING PROFILE<\/h3>\n

Initiating Event:<\/h5>\n

Dyscinetus dubius<\/em> (Olivier) is currently Q-rated.\u00a0 A permanent pest rating proposal is required to support an official pest rating.<\/p>\n

History & Status:<\/h5>\n

Background:<\/u><\/strong> \u00a0Dyscinetus dubius<\/em> is a reddish-brown beetle approximately 1.5 to 2 cm in length.\u00a0 The larvae are whitish C-shaped grubs that live underground and feed on roots.\u00a0 This beetle is reported to be a pest (through larval feeding) of potato, rice, and soybeans in Brazil (Ferreira & Barrigossi, 2006; Ferreira & Martins, 1984), but it has also been associated with, and may feed on corn and elephant ear (Xanthosoma sagittifolium<\/em>) (Araceae) (Joly & Escalona G., 2010).<\/p>\n

Worldwide Distribution<\/u><\/strong>:<\/u><\/strong>\u00a0 Dyscinetus dubius<\/em> is widely distributed throughout Mexico, the Caribbean (including Cuba and Trinidad), Central America (including Costa Rica, Guatemala, Honduras, Nicaragua, and Panama), and South America (including Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, French Guiana, Paraguay, Suriname, and Venezuela) (Ferreira & Martins, 1984; Joly & Escalona G., 2010; Neita-Moreno & Yepes,\u00a0 2011).<\/p>\n

Official Control:<\/u><\/strong> Dyscinetus dubius<\/em> is a prescribed pest in Guyana (Caribbean Invasive Alien Species Network).<\/p>\n

California Distribution: <\/u><\/strong>\u00a0Dyscinetus dubius<\/em> is not known to be present in California.<\/p>\n

California Interceptions:<\/u><\/strong>\u00a0 Dyscinetus dubius <\/em>has been intercepted at a border station on bananas from Ecuador (1183969).<\/p>\n

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

Consequences of Introduction:<\/h5>\n

1)\u00a0<\/strong>Climate\/Host Interaction:<\/strong> Dyscinetus dubius <\/em>appears to be restricted to areas with a subtropical to tropical climate, and this may be expected to limit the potential distribution of this species in California. This beetle is reported to feed on at least four plant families, including Poaceae and Solanaceae, and would likely find suitable food plants over much of the state.\u00a0 \u00a0\u00a0This beetle could possibly become established over a limited portion of California.\u00a0 Therefore, Dyscinetus dubius <\/em>receives a Medium (2)<\/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) <\/strong>may be able to establish in a larger but limited part of California.<\/span><\/p>\n

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

2) Known Pest Host Range: <\/strong>Dyscinetus dubius<\/em> is a generalist and has been reported to feed on plants in the families Araceae, Fabaceae, Poaceae, and Solanaceae. Therefore, it receives a High (3)<\/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.<\/p>\n

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

3) Pest Dispersal Potential:<\/strong> Dyscinetus dubius<\/em> is collected at light, so it can fly.\u00a0 It can be dispersed artificially through movement of infested plant material.\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)<\/strong> has either high reproductive or dispersal potential.<\/span><\/p>\n

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

4) Economic Impact:<\/strong> Dyscinetus dubius<\/em> is a recognized pest of several crops, among them rice.\u00a0 California rice production in 2016 was valued at $649 million (USDA, 2018).\u00a0 Potatoes and corn, which are also grown in California, could also be impacted.\u00a0 If Dyscinetus dubius<\/em> was established in California, it could lower crop yield and increase production costs of these crops.\u00a0 It could also lead to a loss of markets.\u00a0 Therefore, it receives a High (3)<\/span> <\/strong>in this category.<\/p>\n

Economic Impact:\u00a0 A, B, C<\/span><\/strong><\/p>\n

A. The pest could lower crop yield.<\/strong><\/span><\/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).<\/strong><\/span><\/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: 3<\/span><\/strong><\/p>\n

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

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

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

5) Environmental Impact:<\/strong> If Dyscinetus dubius<\/em> became established in California, it could trigger treatment programs if it became a crop pest. 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:\u00a0 D<\/span><\/strong><\/p>\n

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

E. The pest significantly impacts cultural practices, home\/urban gardening or ornamental plantings.<\/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 Dyscinetus dubius<\/em>: Medium (12)<\/span><\/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> Dyscinetus dubius<\/em> is not known to be present 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:<\/h5>\n

7) The final score is<\/strong> the consequences of introduction score minus the post entry distribution and survey information score: Medium (12)<\/span><\/strong><\/p>\n

Uncertainty:<\/h5>\n

Dyscinetus dubius<\/em> appears to be currently limited to areas with a subtropical or tropical climate.\u00a0\u00a0 This beetle may not be capable of becoming established in California, and if it is, it could be limited to a very small area.\u00a0 Rice in California is typically grown in flooded conditions, and this may reduce or eliminate the potential of D. dubius<\/em> to impact this crop, although other crops, including corn and potatoes, could still be affected (California Rice Commission, 2018).\u00a0 Other plants, including native California species that this beetle has not been previously exposed to, could also be attacked in California, which could result in additional impacts on the environment.<\/p>\n

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

Dyscinetus dubius<\/em> is a recognized pest in Latin America.\u00a0 This beetle is not known to be present in California. \u00a0However, it affects crops that are grown in the state, including rice and potatoes.\u00a0 If it became established in the state, it could have economic and environmental impacts.\u00a0 For these reasons, an \u201cA<\/strong>\u201d rating is justified.<\/p>\n

\n
References:<\/h5>\n

California Rice Commission.\u00a0 2018.\u00a0 How rice grows.\u00a0 Accessed 4 January 2018.\u00a0\u00a0http:\/\/calrice.org\/industry\/how-rice-grows<\/a><\/p>\n

Caribbean Invasive Alien Species Network.\u00a0 Guyana. \u00a0Accessed 3 January 2018.\u00a0http:\/\/www.ciasnet.org\/countryprofiles\/guyana<\/a><\/p>\n

Ferreira, E. & Barrigossi, J.A.F.\u00a0 2006.\u00a0 Insetos Oriz\u00edvoros da Parte Subterr\u00e2nea. \u00a0San Ant\u00f4nio de Goi\u00e1s, Goi\u00e1s, Brazil. \u00a052 pp.<\/p>\n

Ferreira, E. & da S. Martins, J.F.\u00a0 1984.\u00a0 Insetos prejudiciais ao arroz no Brasil e seu controle.\u00a0 EMBRAPA-CNPAF. Goi\u00e2nia, Goi\u00e1s, Brazil.\u00a0 67 pp.<\/p>\n

Joly, L.J. & Escalona G., H.E. \u00a02010.\u00a0 El g\u00e9nero Dyscinetus<\/em> Harold (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) en Venezuela y la descripci\u1f79n de una nueva especie.\u00a0 Pap\u00e9is Avulsos de Zoologia.\u00a0 50(14): 203-231.<\/p>\n

Neita-Moreno, J.C. & Yepes, F.\u00a0 2011.\u00a0 Descripci\u1f79n de la larva y pupa de Dyscinetus dubius<\/em> (Coleoptera: Melolonthidae: Dynastinae: Cyclocephalini).\u00a0 Revista Colombiana de Entomolog\u00eda.\u00a0 37(1): 152-156.<\/p>\n

Symbiota Collections of Arthropods Network.\u00a0 Accessed 20 November 2017.\u00a0http:\/\/scan1.acis.ufl.edu<\/a><\/p>\n

United States Department of Agriculture.\u00a0 2016 State Agriculture Overview.\u00a0 California.\u00a0 Accessed 4 January 2018. https:\/\/www.nass.usda.gov\/Quick_Stats\/Ag_Overview\/stateOverview.php?state=CALIFORNIA<\/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\/13\/18 \u2013 5\/28\/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

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\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<\/h3>\n
\n

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

California Pest Rating for Beetle | Dyscinetus dubius (Olivier) Coleoptera: Scarabaeidae Pest Rating: A PEST RATING PROFILE Initiating Event: Dyscinetus dubius (Olivier) is currently Q-rated.\u00a0 A permanent pest rating proposal is required to support an official pest rating. History & Status: Background: \u00a0Dyscinetus dubius is a reddish-brown beetle approximately 1.5 to 2 cm in length.\u00a0 … Continue reading Beetle | Dyscinetus dubius<\/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":[669,15,5],"tags":[],"class_list":["post-5168","post","type-post","status-publish","format-standard","hentry","category-a-rated","category-coleoptera","category-entomology"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5l8vQ-1lm","jetpack-related-posts":[{"id":5531,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=5531","url_meta":{"origin":5168,"position":0},"title":"Rice Beetle | Dyscinetus morator (Fabricius)","author":"Kyle Beucke","date":"June 25, 2018","format":false,"excerpt":"California Pest Rating\u00a0 for Rice Beetle | Dyscinetus morator (Fabricius) Coleoptera: Scarabaeidae Pest Rating: A \u00a0 PEST RATING PROFILE Initiating Event: Dyscinetus morator is currently Q-rated.\u00a0 A permanent pest rating proposal is required to support an official pest rating. History & Status: Background: \u00a0Adult Dyscinetus morator are beetles that measure\u2026","rel":"","context":"In "A-Rated"","block_context":{"text":"A-Rated","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=669"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1954,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1954","url_meta":{"origin":5168,"position":1},"title":"Insects, Mites & Earthworms","author":"Admin","date":"May 13, 2016","format":false,"excerpt":"Insects and mites are related in that their skeletons are on the outside (Phyllum: Arthropoda), but differ in that adult insects have six legs and adult mites have eight.\u00a0 Both groups can be beneficial, neutral or destructive to their environment.\u00a0 Like nematodes, they can cause yearly losses in the billions\u2026","rel":"","context":"In "Ratings"","block_context":{"text":"Ratings","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=333"},"img":{"alt_text":"Insects and Mites Banner","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/05\/insects-and-mites-featured-image.jpg?fit=1038%2C588&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/05\/insects-and-mites-featured-image.jpg?fit=1038%2C588&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/05\/insects-and-mites-featured-image.jpg?fit=1038%2C588&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/05\/insects-and-mites-featured-image.jpg?fit=1038%2C588&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":11057,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=11057","url_meta":{"origin":5168,"position":2},"title":"Paropsis atomaria Olivier: leaf beetle","author":"Kyle Beucke","date":"October 10, 2022","format":false,"excerpt":"California Pest Rating Profile for Paropsis atomaria Olivier: leaf beetlePest Rating: B download pest rating profile *NOTE You must be registered and logged in to post a comment. If you have registered and have not received the registration confirmation, please contact us at permits[@]cdfa.ca.gov. Posted by tn","rel":"","context":"In "B-Rated"","block_context":{"text":"B-Rated","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=670"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":10657,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=10657","url_meta":{"origin":5168,"position":3},"title":"Sybra alternans Wiedemann: longhorn beetle","author":"Kyle Beucke","date":"June 7, 2022","format":false,"excerpt":"California Pest Rating Profile for Sybra alternans Wiedemann: longhorn beetlePest Rating: A DOWNLOAD PEST RATING profile *NOTE You must be registered and logged in to post a comment. If you have registered and have not received the registration confirmation, please contact us at permits[@]cdfa.ca.gov. Posted by tn","rel":"","context":"In "A-Rated"","block_context":{"text":"A-Rated","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=669"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":11371,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=11371","url_meta":{"origin":5168,"position":4},"title":"Anomala orientalis (Waterhouse): Oriental beetle","author":"Kyle Beucke","date":"January 24, 2023","format":false,"excerpt":"California Pest Rating Profile for Anomala orientalis (Waterhouse): Oriental beetlePest Rating: A download pest rating profile *NOTE You must be registered and logged in to post a comment. If you have registered and have not received the registration confirmation, please contact us at permits[@]cdfa.ca.gov. 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