{"id":1347,"date":"2015-12-16T16:01:05","date_gmt":"2015-12-17T00:01:05","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1347"},"modified":"2022-05-16T09:50:22","modified_gmt":"2022-05-16T16:50:22","slug":"ophelimus-maskelli-ashmead-eucalyptus-gall-wasp","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1347","title":{"rendered":"Ophelimus maskelli (Ashmead): Eucalyptus Gall Wasp"},"content":{"rendered":"
California Pest Rating for<\/strong><\/h5>\n
Ophelimus maskelli<\/em><\/strong> (Ashmead): Eucalyptus Gall Wasp<\/strong><\/h5>\n
Hymenoptera: Eulophidae<\/strong><\/h5>\n
Pest Rating: \u00a0C<\/strong><\/h5>\n
\n
PEST RATING PROFILE<\/strong><\/h5>\n
Initiating Event: <\/strong><\/h5>\n

Ophelimus maskelli<\/em> has been found in the environment of southern California and is presently assigned a temporary rating of \u201cQ\u201d.\u00a0 A pest rating proposal is required to assign a permanent pest rating.<\/p>\n

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

Background<\/u><\/strong>:\u00a0 Ophelimus maskelli<\/em> is a species of wasp that induces galls on leaves of several species of Eucalyptus<\/em>.\u00a0 Uncontrolled populations can cause severe leaf damage and early leaf drop1<\/sup>.<\/p>\n

Worldwide Distribution<\/u><\/strong>: Ophelimus maskelli<\/em> is probably native to Australia.\u00a0 It was first found in the Mediterranean basin in Italy in 1999 and has since spread around the region1<\/sup>.\u00a0 It has also been found in New Zealand, Indonesia, South Africa, and Vietnam1<\/sup>.\u00a0 Ophelimus maskelli may be transported long distances when infested plants or fresh plant parts are moved.<\/p>\n

Official Control<\/u><\/strong>: Ophelimus maskelli<\/em> is not known to be under official control in any other states or nations.<\/p>\n

California Distribution<\/u><\/strong>:\u00a0 Ophelimus maskelli<\/em> is found in the environment of Riverside, San Diego, and Orange County1<\/sup>.\u00a0 It is likely present in Los Angeles County.<\/p>\n

California Interceptions<\/u><\/strong>:\u00a0 Ophelimus maskelli<\/em> has been found in one nursery in Riverside County (PDR 331P06142763).<\/p>\n

The risk Ophelimus maskelli<\/em> (Eucalyptus gall wasp) would pose to California is evaluated below.<\/p>\n

Consequences of Introduction:\u00a0<\/strong><\/h5>\n

1) Climate\/Host Interaction<\/span><\/strong>: Eucalyptus trees are commonly planted as ornamentals in southern and coastal California. Ophelimus maskelli<\/em> is likely to establish wherever suitable hosts are found.\u00a0 It receives a Medium (2) <\/strong><\/span>in this category.<\/p>\n

Evaluate if the pest would have suitable hosts and climate to establish in California.\u00a0 Score:<\/p>\n

– Low (1)<\/strong> Not likely to establish in California; or likely to establish in very limited areas.
\n– Medium (2)<\/strong> may be able to establish in a larger but limited part of California.
\n<\/span>– High (3)<\/strong> likely to establish a widespread distribution in California.<\/p>\n

2)<\/strong> Known Pest Host Range<\/strong><\/span>: Ophelimus maskelli<\/em> is only known to feed on the leaves of Eucalyptus trees.\u00a0 It receives a Low (1)<\/strong><\/span> in this category.<\/p>\n

Evaluate the host range of the pest. Score:<\/p>\n

– Low (1)<\/strong> has a very limited host range.
\n<\/span>– Medium (2)<\/strong> has a moderate host range.
\n– High (3)<\/strong> has a wide host range.<\/p>\n

3)<\/strong> Pest Dispersal Potential<\/strong><\/span>: Ophelimus maskelli<\/em> can build large populations quickly, indicating high reproductive potential.\u00a0 It may be transported long distances in infested plants or fresh plant parts.\u00a0 It receives a High (3)<\/strong><\/span> in this category.<\/p>\n

Evaluate the natural and artificial dispersal potential of the pest. Score:<\/p>\n

– Low (1)<\/strong> does not have high reproductive or dispersal potential.
\n– Medium (2)<\/strong> has either high reproductive or dispersal potential.
\n– High (3)<\/strong> has both high reproduction and dispersal potential.<\/span><\/p>\n

4) Economic Impact<\/span><\/strong>: Ophelimus maskelli<\/em> is not expected to lower any crop yields.\u00a0 It may lower the value of Eucalyptus nursery stock by disfiguring plants with its presence.\u00a0 It is not expected to disrupt markets, change cultural practices, vector other organisms, or injure animals.\u00a0 Ophelimus maskelli<\/em> receives a Low (1)<\/strong><\/span> in this category.<\/p>\n

Evaluate the economic impact of the pest to California using the criteria below. Score:<\/p>\n

A. \u00a0The pest could lower crop yield.
\nB. \u00a0<\/span><\/strong>The pest could lower crop value (includes increasing crop production costs).<\/span>
\n<\/span><\/strong>C. \u00a0The pest could trigger the loss of markets (includes quarantines).
\nD. \u00a0The pest could negatively change normal cultural practices.
\nE. \u00a0The pest can vector, or is vectored, by another pestiferous organism.
\nF. \u00a0The organism is injurious or poisonous to agriculturally important animals.
\nG. \u00a0The organism can interfere with the delivery or supply of water for agricultural uses.<\/p>\n

– Low (1)<\/strong> causes 0 or 1 of these impacts.
\n<\/span>– Medium (2)<\/strong> causes 2 of these impacts.
\n– High (3)<\/strong> causes 3 or more of these impacts.<\/p>\n

5)<\/strong> \u00a0Environmental Impact<\/span><\/strong>: Ophelimus maskelli<\/em> is not expected to lower biodiversity, disrupt natural communities, or change ecosystem processes.\u00a0 It is not expected to directly affect threatened or endangered species or disrupt critical habitats.\u00a0 It may trigger additional treatment programs in the nursery industry and by residents who find infested plants unsightly.\u00a0 Eucalyptus trees are common ornamentals and can be defoliated by this wasp.\u00a0 Ophelimus maskelli<\/em> receives a High (3)<\/strong><\/span> in this category.<\/p>\n

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

A. \u00a0The pest could have a significant environmental impact such as lowering biodiversity, disrupting natural communities, or changing ecosystem processes.
\nB. \u00a0The pest could directly affect threatened or endangered species.
\nC. \u00a0The pest could impact threatened or endangered species by disrupting critical habitats.
\nD. \u00a0<\/span><\/strong>The pest could trigger additional official or private treatment programs.<\/span>
\n<\/span><\/strong>E. <\/span><\/strong>\u00a0The pest significantly impacts cultural practices, home\/urban gardening or ornamental plantings.<\/span><\/p>\n

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

– Low (1)<\/strong> causes none of the above to occur.
\n– Medium (2)<\/strong> causes one of the above to occur.
\n– High (3)<\/strong> causes two or more of the above to occur.<\/span><\/p>\n

Consequences of Introduction to California for Ophelimus maskelli<\/em> (Eucalyptus gall wasp):<\/strong>\u00a0 Medium (10)<\/strong><\/span><\/h5>\n

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

–Low<\/strong> = 5-8 points
\n–Medium<\/strong> = 9-12 points
\n<\/span>–High<\/strong> = 13-15 points<\/p>\n

6) \u00a0Post Entry Distribution and Survey Information<\/span><\/strong>: Ophelimus maskelli<\/em> is established in Riverside, San Diego, and Orange counties1<\/sup>.\u00a0 It is probably also present in Los Angeles County.\u00a0 It receives a Medium (-2)<\/strong><\/span> in this category.<\/p>\n

Evaluate the known distribution in California. Only official records identified by a taxonomic expert and supported by voucher specimens deposited in natural history collections should be considered. Pest incursions that have been eradicated, are under eradication, or have been delimited with no further detections should not be included.<\/p>\n

–Not established (0)<\/strong> Pest never detected in California, or known only from incursions.
\n–Low (-1)<\/strong> Pest has a localized distribution in California, or is established in one suitable climate\/host area (region).
\n–Medium (-2)<\/strong> Pest is widespread in California but not fully established in the endangered area, or pest established in two contiguous suitable climate\/host areas.
\n<\/span>–High (-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.<\/p>\n

Final Score:<\/h5>\n

The final score is the consequences of introduction score minus the post entry distribution and survey information score: Low (8) <\/strong><\/span><\/p>\n

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

Ophelimus maskelli<\/em> was widespread and abundant in southern California when it was first observed.\u00a0 It is likely much more widespread.<\/p>\n

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

Ophelimus maskelli<\/em> is widespread and abundant in the environment of southern California and is not under official control.\u00a0 Impacts are expected to be limited to disfigurement of Eucalyptus trees and possible increased insecticide use.\u00a0 A \u201cC<\/span>\u201d rating is justified.<\/strong><\/p>\n

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

1<\/sup><\/strong> <\/span>Burks, Roger A., Jason L. Mottern, Rebeccah Waterworth, and Timothy D. Paine. 2015. First report of the Eucalyptus gall wasp, Ophelimus maskelli<\/em> (Hymenoptera: Eulophidae), an invasive pest on Eucalyptus<\/em>, from the Western Hemisphere.\u00a0 Zootaxa 3926(3): 448-450.<\/p>\n

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

Jason Leathers, 1220 N Street, Sacramento, CA, 95814, (916) 654-1211, plant.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:\u00a0<\/strong><\/p>\n

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: \u00a0C<\/strong><\/h3>\n
\n

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

California Pest Rating for Ophelimus maskelli (Ashmead): Eucalyptus Gall Wasp Hymenoptera: Eulophidae Pest Rating: \u00a0C PEST RATING PROFILE Initiating Event: Ophelimus maskelli has been found in the environment of southern California and is presently assigned a temporary rating of \u201cQ\u201d.\u00a0 A pest rating proposal is required to assign a permanent pest rating. History & Status: … Continue reading Ophelimus maskelli (Ashmead): Eucalyptus Gall Wasp<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":7,"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":[136,5],"tags":[223,225,224,189,52,226],"class_list":["post-1347","post","type-post","status-publish","format-standard","hentry","category-hymenoptera","category-entomology","tag-entomology","tag-eucalyptus-gail-wasp","tag-eulophidae","tag-hymenoptera","tag-insects-and-mites","tag-ophelimus-maskelli"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5l8vQ-lJ","jetpack-related-posts":[{"id":9219,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=9219","url_meta":{"origin":1347,"position":0},"title":"Trissolcus japonicus (Ashmead): Samurai wasp","author":"Kyle Beucke","date":"November 29, 2021","format":false,"excerpt":"California Pest Rating for Trissolcus japonicus (Ashmead): Samurai waspPest Rating: D download pest rating *NOTE You must be registered and logged in to post a comment. 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