{"id":4413,"date":"2018-01-16T15:23:46","date_gmt":"2018-01-16T23:23:46","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=4413"},"modified":"2018-03-07T16:02:34","modified_gmt":"2018-03-08T00:02:34","slug":"banded-elm-bark-beetle-scolytus-schevyrewi-semenov","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=4413","title":{"rendered":"Banded Elm Bark Beetle | Scolytus schevyrewi Semenov"},"content":{"rendered":"
California Pest Rating\u00a0 for<\/h5>\n
Banded Elm Bark Beetle | Scolytus schevyrewi<\/em> Semenov<\/h5>\n
Coleoptera<\/h5>\n
Pest Rating: C<\/h5>\n

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

PEST RATING PROFILE<\/h3>\n
Initiating Event:<\/h5>\n

Scolytus schevyrewi <\/em>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> Scolytus schevyrewi <\/em>can be recognized by its relatively large size (2.7-4.3 mm in length), the dark band running across the median portions of the elytra, and the position and shape of the abdominal spine.\u00a0 In the United States, this species attacks elms (Ulmus<\/em> americana<\/em>, U. pumila<\/em>, U. thomasii<\/em>, and U. procera<\/em>).\u00a0 In its native range, it has been reported feeding on trees in the genera Malus<\/em> and Prunus<\/em>.\u00a0 These genera include important fruit trees in California.\u00a0 As of 2005, however, there were no records of this beetle attacking trees other than elms in the United States.\u00a0 The species appears to preferentially attack, or cause greater damage to weakened or stressed trees.\u00a0 Drought stress may be associated with greater damage.\u00a0 Maturation feeding (feeding by adults before mating) occurs on twigs.\u00a0 This beetle is apparently capable of transmitting the Dutch elm disease fungus to otherwise healthy trees, and maturation feeding is one way this could occur.<\/p>\n

Worldwide Distribution<\/u><\/strong>:<\/u><\/strong> Scolytus schevyrewi <\/em>is native to northern China, Central Asia, and Russia.\u00a0 The beetle was introduced to the United States in 1994 or earlier, as this when the first specimen was collected, but recognition of the species and the fact it was present in the United States took a decade, probably because of the similarity of this species to Scolytus multistriatus<\/em>. \u00a0Scolytus schevyrewi<\/em> is widely distributed in the United States and has been reported from at least 28 states.\u00a0 The species has also been introduced to Canada and Mexico.<\/p>\n

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

California Distribution: <\/u><\/strong>\u00a0Scolytus schevyrewi<\/em> has been found in at least 13 counties in California, ranging from Lassen County in the north to San Diego County in the south.<\/p>\n

California Interceptions:<\/u><\/strong> Scolytus schevyrewi <\/em>has been trapped in 9 counties from 2004-2010 (Kern, Inyo, Lassen, Los Angeles, Mono, Nevada, Sacramento, San Diego, and San Bernardino) (PDR # 5035940, 1355030, 1355032, 1355027, 1355031, 1311668, 1322007, 1322005, 1368633, 1322006).<\/p>\n

The risk Scolytus schevyrewi <\/em>would pose to California is evaluated below.<\/p>\n

Consequences of Introduction:<\/h5>\n

1) Climate\/Host Interaction:<\/strong> Scolytus schevyrewi <\/em>is already present in at least 13 counties in California, from Lassen County in the north to San Diego County in the south. The beetle is also widely distributed over much of the rest of the continental United States.\u00a0 This suggests it has the potential to become established over much or most of the state of California.\u00a0 Elms are widely planted in California. \u00a0Therefore, Scolytus schevyrewi<\/em> receives a High (3)<\/strong> 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.<\/p>\n

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

2) Known Pest Host Range: <\/strong>Even though Scolytus schevyrewi<\/em> has not been reported to attack trees other than a few species of Ulmus<\/em> in the United States, it is also reported to attack trees in the Rosaceae in its native range. Therefore, it receives a Medium (2)<\/strong><\/span> in this category.<\/p>\n

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

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

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

3) Pest Dispersal Potential:<\/strong> Scolytus schevyrewi<\/em> is capable of sustained flight and it infests wood and wood products that could be moved (e.g. firewood). Therefore, it receives a Medium (2)<\/strong><\/span> 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> There does not appear to be any significant economic damage associated with schevyrewi<\/em> in California, even though it is present over a large portion of the state.\u00a0 Elms are not a major timber tree, and the genus Prunus<\/em>, which includes important fruit trees, does not appear to be affected in the United States.\u00a0 Therefore, it receives a Low (1)<\/strong> <\/span>in this category.<\/p>\n

Economic Impact:\u00a0 E<\/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).<\/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<\/strong>. The pest can vector, or is vectored, by another pestiferous organism.<\/span><\/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)<\/strong> causes 0 or 1 of these impacts.<\/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> Scolytus schevyrewi <\/em>does not appear to have had a significant environmental impact in California, even though it is widely distributed in the State. Elms (Ulmus<\/em>) are not native to California, and these are the only trees reported as being impacted by this beetle in the United States. \u00a0Even though there do not appear to be many reports of this beetle damaging planted elms in the state, it is possible that this could occur during periods of drought.\u00a0 Therefore, it receives a Medium (2)<\/strong> <\/span>in this category.<\/p>\n

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

Environmental Impact: E<\/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.<\/p>\n

E<\/strong>. The pest significantly impacts cultural practices, home\/urban gardening or ornamental plantings.<\/span><\/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)<\/strong> causes one of the above to occur.<\/span><\/p>\n

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

Consequences of Introduction to California for Scolytus schevyrewi<\/em>: Medium (10)<\/span><\/strong><\/h5>\n

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

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

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

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

6) Post Entry Distribution and Survey Information:<\/strong> Scolytus schevyrewi <\/em>has already spread to at least 13 counties in California.\u00a0 The full extent of its distribution in the state is not known, and it is likely that its distribution will continue to expand.\u00a0 The current range represents a large enough area to consider the species fully established for the purposes of this pest rating proposal.\u00a0 It receives a High (-3)<\/strong><\/span> in this category.<\/p>\n

\u2013Not established (0) Pest never detected in California, or known only from incursions.<\/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)<\/strong> Pest has fully established in the endangered area, or pest is reported in more than two contiguous or non-contiguous suitable climate\/host areas.<\/span><\/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: Low (7)<\/span><\/strong><\/p>\n

Uncertainty:<\/h5>\n

The host range of S. schevyrewi<\/em> in the United States was considered, for the purposes of this pest rating proposal, to be significantly narrower than what has been reported for this species\u2019 native distribution.\u00a0 This was based on the available information.\u00a0 Because S. schevyrewi <\/em>is already so widespread in the United States, it seemed that, if it had a broader host range in this country, it would have been reflected in the literature, especially considering how much attention this species has received.\u00a0 It is possible that S. schevyrewi<\/em> does attack other genera and\/or species of trees in the United States, but this has escaped attention.<\/p>\n

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

When it was initially determined, in the mid-2000s, that Scolytus schevyrewi<\/em> was present in the United States, there was much concern regarding the possible impact of this species on elms (and possibly on fruit trees as well).\u00a0 However, over a decade has elapsed and there is very little evidence of major economic or environmental impacts resulting from the species.\u00a0 It is apparently already widely distributed in California, and there is little evidence of significant impacts in the state.\u00a0 A \u201cC\u201d<\/strong> rating is justified.<\/p>\n

\n
References:<\/h5>\n

Campos-Bola\u00f1os, R., Atkinson, T.H., Cibrian-Tovar, D., and T. M\u00e9ndez-Montiel.\u00a0 2015.\u00a0 Primer registro de Scolytus schevyrewi<\/em> Semenov 1902 (Coleoptera: Curculionidae: Scolytinae) en Mexico.\u00a0 Acta Zoologica Mexicana.\u00a0 31(1): 146-148.<\/p>\n

LaBonte, J.R.\u00a0 2010.\u00a0 The banded elm bark beetle, Scolytus schevyrewi<\/em> Semenov (Coleoptera, Curculionidae, Scolytinae) in North America; a taxonomic review and modifications to the Wood (1982) key to the species of Scolytus<\/em> Geoffroy in North and Central America.\u00a0 ZooKeys.\u00a0 56: 207-218.<\/p>\n

Lee, J.C., Negr\u1f79n, J.F., McElwey, S.J., Witcosky, J.J., and S.J. Seybold.\u00a0 2006.\u00a0 Pest Alert: Banded elm beetle \u2013 Scolytus schevyrewi<\/em>.\u00a0 United States Department of Agriculture.\u00a0 https:\/\/www.fs.usda.gov\/Internet\/FSE_DOCUMENTS\/fsbdev2_026555.pdf<\/a><\/p>\n

Negr\u1f79n, J.F., Witcosky, J.J., Cain, R.J., LaBonte, J.R., and Duerr II, D.A., McElwey, S.J., Lee, J.C., and S.J. Seybold.\u00a0 2005.\u00a0 The banded elm bark beetle: A new threat to elms in North America.\u00a0 American Entomologist.\u00a0 51(2): 84-94.<\/p>\n

Seybold, S.J., Penrose, R.L., and A.D. Graves.\u00a0 2016.\u00a0 Chapter 21: Invasive bark and ambrosia beetles in California Mediterranean forest ecosystems.\u00a0 In Paine, T.D. and F. Lieutier (Eds.), Insects and Diseases of Mediterranean Forest Systems (pp. 583-662).\u00a0 Springer.<\/p>\n

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

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

Responsible Party:<\/h5>\n

Jason Leathers, 2800 Gateway Oaks Drive, Sacramento CA 95833, (916) 654-1211;\u00a0\u00a0plant.health[@]cdfa.ca.gov.<\/p>\n

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

1\/16\/2018 – 3\/2\/2018<\/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: C<\/h3>\n

 <\/p>\n

\n

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

California Pest Rating\u00a0 for Banded Elm Bark Beetle | Scolytus schevyrewi Semenov Coleoptera Pest Rating: C \u00a0 PEST RATING PROFILE Initiating Event: Scolytus schevyrewi is currently Q-rated.\u00a0 A permanent pest rating proposal is required to support an official pest rating. History & Status: Background: Scolytus schevyrewi can be recognized by its relatively large size (2.7-4.3 … Continue reading Banded Elm Bark Beetle | Scolytus schevyrewi Semenov<\/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_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},"jetpack_post_was_ever_published":false},"categories":[15,5],"tags":[633,184,52],"class_list":["post-4413","post","type-post","status-publish","format-standard","hentry","category-coleoptera","category-entomology","tag-banded-elm-bark-beetle","tag-coleoptera","tag-insects-and-mites"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5l8vQ-19b","jetpack-related-posts":[{"id":10657,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=10657","url_meta":{"origin":4413,"position":0},"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":4413,"position":1},"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. 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":1954,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1954","url_meta":{"origin":4413,"position":2},"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":7725,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=7725","url_meta":{"origin":4413,"position":3},"title":"Icosium tomentosum Ganglbauer: a longhorn beetle","author":"Kyle Beucke","date":"October 28, 2020","format":false,"excerpt":"California Pest Rating Profile for Icosium tomentosum Ganglbauer: a longhorn 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 ta","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":8208,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=8208","url_meta":{"origin":4413,"position":4},"title":"Cyclorhipidion distinguendum (Eggers): an ambrosia beetle","author":"Kyle Beucke","date":"March 16, 2021","format":false,"excerpt":"California Pest Rating Profile for Cyclorhipidion distinguendum (Eggers): an ambrosia beetlePest Rating: C 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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