{"id":3501,"date":"2017-03-20T13:25:52","date_gmt":"2017-03-20T20:25:52","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=3501"},"modified":"2024-04-26T10:57:51","modified_gmt":"2024-04-26T17:57:51","slug":"ganoderma-adspersum-schulzer-donk","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=3501","title":{"rendered":"Ganoderma adspersum (Schulzer) Donk"},"content":{"rendered":"
\u00a0California Pest Rating for<\/strong><\/h5>\n
Ganoderma adspersum<\/em><\/strong> (Schulzer) Donk<\/strong><\/h5>\n
Pest Rating: B<\/strong><\/h5>\n
\n
PEST RATING PROFILE<\/strong><\/h5>\n
Initiating Event: <\/strong><\/h5>\n

On January 25, 2017, Dr. David Rizzo, Professor, Department of Plant Pathology, University of California, Davis, notified CDFA of his detection of Ganoderma adspersum<\/em> in almond orchards in the San Joaquin Valley, during surveys which initiated during fall 2015, of almond trees for wood decay fungi. The fungus was noted to be very aggressive and had killed relatively young almond trees in some orchards.\u00a0 Consequently, CDFA will collect official samples of the fungus for analysis at the CDFA Plant Pathology Laboratory, and for official record.\u00a0 Ganoderma adspersum<\/em> has not been reported earlier from California or North America (Rizzo, 2017a).\u00a0 The potential risk of infestation of G. adspersum<\/em> is assessed here and a permanent rating is proposed for the species.<\/p>\n

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

Background<\/u><\/strong>: \u00a0\u00a0Ganoderma adspersum<\/em> is a wood-decaying fungus that occurs in a very wide range of tree species including deciduous trees and conifers throughout the world. The species has more frequently been detected in trees growing near human habitations, gardens, parks, and planted sites (Papp & Szabo, 2013; De Simone & Annesi, 2012).\u00a0 \u00a0Ganoderma adspersum<\/em> is a pathogen of roots and butts of living trees causing white rot, and can continue to grow saprophytically on nonliving tissue such as, stumps of felled trees (De Simone & Annesi, 2012). \u00a0Ganoderma<\/em> species often kill their hosts and frequently, a diseased tree breaks or is wind-thrown while still alive as a result of decay in the butt and base of the trunk (Sinclair & Lyon, 2005). Unlike other closely related species, G. adspersum<\/em> is an aggressive species that is able to penetrate and break through intact reaction zones of infected wood causing progressive and extensive decay over a relatively short period of time (De Simone & Annesi, 2012). \u00a0\u00a0In Italy, G. adspersum-<\/em>infected pine stands were felled within two years of infection (De Simone & Annesi, 2012).<\/p>\n

Ganoderma adspersum<\/em> has been known by several names.\u00a0 The fungus was originally found growing on Carpinus betulus<\/em> (European hornbeam) in Croatia, and published by Schulzer 1878 as Polyporus adspersus<\/em>, and later as P. linhartii <\/em>Kalchbr. 1884, Ganoderma linhartii<\/em> (Kalchbr.) Z. Igm\u00e1ndy 1968, and G. europaeum<\/em> Steyaert 1961.\u00a0 After studying all specimens under the different species names, in 1969, Donk concluded the correct name for the fungus, G. adspersum<\/em> (Tortic, 1971). In European polypore monographs, G. adspersum <\/em>was found under the name, G. australe<\/em> (Fr.) Pat. 1889.\u00a0 However, through molecular analysis, the European taxon (G. adspersum<\/em>) was differentiated from the Australian taxon (G. australe<\/em>). \u00a0Ganoderma adspersum<\/em> is the name of the European species (Papp & Szab\u00f3, 2013).\u00a0 Differentiation of species of Ganoderma<\/em> is confusing and problematic with only seven species, including G. adspersum<\/em>, being accepted in the European polypore monographs (Papp & Szab\u00f3, 2013).\u00a0 Taxonomically, G. adspersum<\/em> is a distinct species belonging to the G. applanatum \u2013 australe<\/em> complex (Papp & Szab\u00f3, 2013).<\/p>\n

The species was first reported from Europe and is primarily found in that continent. However, it has also been found in Argentina, Brazil, American Samoa, and recently in the USA (California) (see<\/em>: \u2018Worldwide Distribution\u2019).<\/p>\n

In California, Ganoderma adspersum<\/em> was detected in nine and ten year old almond orchards trees in Kings County during surveys of almonds for wood decay fungi in February 2016 (Rizzo, 2017a)\u00a0 Over a three-year period, the orchard had experienced almost 20% tree loss, resulting in its removal by the end of 2016.\u00a0 This detection marked a first for the fungus in California and North America.\u00a0 Another detection was made in August 2016, in a twelve-year old almond orchard in Fresno County, and in 2017, additional infections were detected in Tulare, Kern, and Madera Counties (Rizzo, 2017b). \u00a0Presently, in California, the fungus has been found only in almond, prune and peach. All surveyed almond trees were planted on peach rootstock (Rizzo, 2017b).<\/p>\n

Disease development<\/u>:<\/strong>\u00a0 Generally, most infections are initiated by airborne basidiospores that enter wounds on roots and trunk bases.\u00a0 Basidiocarps (fruiting bodies or conks containing numerous spore producing structures or basidia) usually grow from the vicinity of old wounds.\u00a0 Basidiospores are produced in great numbers during evening hours when the air is humid.\u00a0 Experimentally, infection by root contact with previously colonized wood is also possible, although tree-to-tree spread has not been indicated by field observations (Sinclair & Lyon, 2005).<\/p>\n

Dispersal and spread:<\/em> Primarily by airborne basidiospores (De Simone & Annesi, 2012).<\/p>\n

Hosts:<\/em> Abies<\/em> sp. (fir), A. alba <\/em>(silver fir), Acer saccharinum<\/em> (silver maple), Aesculus hippocastanum<\/em> (horse chestnut), Betula pendula<\/em> (European white birch), Broussonetia papyrifera<\/em> (paper mulberry), Carpinus betulus<\/em> (European hornbeam), Cedrus deodara<\/em> (deodar cedar), Celtis occidentalis<\/em> (common hackberry), Cercis siliquastrum<\/em> (Judas tree), Fagus sylvatica<\/em> (European\/common beech), Fraximus<\/em> sp. (ash), F. angustifo<\/em>lia subsp. danubialis<\/em> (narrow-leafed ash), F. ornus<\/em> (manna ash), Gleditschia triacanthos<\/em> (honeylocust), Gymnocladus dioicus<\/em> (Kentucky coffeetree), Juglans nigra<\/em> (black walnut), Laurus nobilis<\/em> (bay laurel), Picea abies <\/em>(Norway spruce), Pinus<\/em> sp. (pine), P. pinea<\/em> (Italian stone pine), Platanus<\/em> sp. (sycamore\/plane trees), Populus alba<\/em> (white poplar), P. nigra<\/em> (black poplar), Prunus avium<\/em> (wild cherry), P. padus<\/em> (European bird cherry), P. cerasus<\/em> (sour cherry), P. domestica<\/em> (European plum), P. dulcis<\/em> (almond), P. persica<\/em> (peach), Prunus<\/em> sp. (plum), Robinia<\/em> sp. (locusts), R. pseudoacacia<\/em> (black locust),\u00a0 Quercus<\/em> sp. (oak), Q. cerris <\/em>(Turkey oak), Q. petraea<\/em> (sessile oak), Q. pubescens<\/em> (downy oak ), Q. robur<\/em> (English oak), Q. ilex<\/em> (holly oak), Morus<\/em> sp. (mulberry), Salix<\/em> sp. (willow), Tilia<\/em> sp. (basswood), T. cordata<\/em> (littleleaf linden), Ulmus laevis<\/em> (European white elm), Zelkova serrata<\/em> (Japanese zelkova) (De Simone & Annesi, 2012; Farr & Rossman, 2017; Gottlieb et al<\/em>., 1998; Papp, 2013; Rizzo, 2017b; Tortic, 1970);<\/p>\n

Symptoms<\/em>: \u00a0In general, trees affected by Ganoderma<\/em> develop widespread decay of sapwood in the butt and major roots.\u00a0 Other symptoms include loss of vigor, undersized and sometimes yellowing or wilting leaves, thin crowns, and dead branches.\u00a0 Some infected trees may die while others are weakened and fall by windstorms as a result of decay.\u00a0 In advanced stages of decay, wood is light colored and stringy or spongy.\u00a0 Large, reddish brown basidiocarps of G. adspersum <\/em>grow from roots or butts (Sinclair & Lyon, 2005).\u00a0 Progression of decay may be favored by predisposing conditions such as wounds, excessive stem density, or water stress (De Simone & Annesi, 2012).<\/p>\n

Damage Potential:\u00a0 Ganoderma adspersum <\/em>causes wood decay and root rot thereby decreasing structural strength, growth and stand of infected trees.\u00a0 In California, Rizzo (2017b) reported 50% to 70% infection rates in almond and prune orchards, with tree loss being exponential over time. Very high infection levels were observed in 9-12 years old almond orchards.\u00a0 The life span of a typical almond orchard is about 25 years.\u00a0 However, extensive infections may be terminal for almond orchards.\u00a0 Few orchards were removed entirely due to high infections of Ganoderma adspersum.<\/em><\/p>\n

Worldwide Distribution<\/u>:<\/strong> Europe<\/em>: Belgium, England, Germany, Hungary, Italy, Yugoslavia; North America<\/em>: USA (California); South America<\/em>: Argentina; Brazil; Oceania<\/em>: American Samoa (CABI, 2017; De Simone & Annesi, 2012; Farr & Rossman, 2017; Gottlieb et al<\/em>., 1998; Tortic, 1971)<\/p>\n

Official Control<\/u>:<\/strong> No official controls are reported for Ganoderma adspersum<\/em>.\u00a0 However, Ganoderma<\/em> spp. is on the \u201cHarmful Organism Lists\u201d for Colombia and Jamaica.\u00a0 Shipments of Ganoderma<\/em> spp.-free Phoenix dactylifera,<\/em> (date palm) plants is required by Colombia (USDA PCIT, 2017).<\/p>\n

California Distribution<\/u>:<\/strong> Ganoderma adspersum<\/em> has been found in almond and prune orchards in Fresno, Kings, Tulare, Kern, and Madera Counties (Rizzo, 2017b).<\/p>\n

California Interceptions<\/u>:<\/strong> None reported.<\/p>\n

The risk Ganoderma adspersum<\/em> would pose to California is evaluated below.\u00a0<\/strong><\/p>\n

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

1) Climate\/Host Interaction: <\/strong>Presently, Ganoderma adspersum<\/em> has been found in almond and prune orchards within the San Joaquin Valley.\u00a0 It has therefore demonstrated its capability to establish under suitable climates for those hosts within the State.<\/p>\n

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

Score: 3<\/span><\/strong><\/p>\n

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

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

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

2) Known Pest Host Range:<\/strong> Ganoderma adspersum<\/em> has a wide host range which includes deciduous and confer trees reported worldwide.\u00a0 However, in California, the fungus has presently been detected in almond, prune and peach (almond on peach root stock) (Rizzo, 2017b). Those fruit hosts are cultivated in significant acreage in California.<\/p>\n

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

Score: 3<\/span><\/strong><\/p>\n

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

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

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

3) Pest Dispersal Potential:<\/strong> Numerous basidiospores are produced by the fungus but are dependent on wind currents for dispersal and spread to non-infected trees. Therefore, a Medium <\/strong><\/span>rating is given for high reproductive potential.<\/p>\n

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

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

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

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

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

4) Economic Impact: <\/strong>Rizzo (2017b) reported 50% to 70% infection rates in almond and prune orchards in California, with tree loss being exponential over time.\u00a0 Ganoderma adspersum <\/em>causes wood decay and root rot resulting in decreased structural strength, growth and stand of infected trees.\u00a0 Few orchards were removed entirely due to high infections.<\/p>\n

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

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

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

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

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

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

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

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

5) Environmental Impact: <\/strong>Ganoderma adspersum<\/em> has been reported on several hosts that are found in California environments.\u00a0 Internationally, the fungus has more frequently been detected in trees growing near human habitations, gardens, parks, and planted sites.\u00a0 However, in California, the fungus has only been detected in cultivated almond and prune. Other hosts may be threatened if the almond isolate in California is able to infect them.\u00a0 However, as presently this is not known, the fungus is given a Medium<\/strong><\/span> score for potentially impacting urban gardens and plantings.<\/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

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

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

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

Consequences of Introduction to California for Ganoderma adspersum<\/em>:<\/strong> High<\/strong> <\/span>(13)<\/span>. <\/strong><\/h5>\n

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

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

-Medium = 9-12 points<\/p>\n

–High<\/strong> = 13-15 points<\/span><\/p>\n

6) Post Entry Distribution and Survey Information<\/strong>: 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

Evaluation is <\/em><\/strong>Medium (-2)<\/span>.\u00a0 <\/strong>Ganoderma adspersum<\/em> has been reported (Rizzo, 2017a, 2017b) from Fresno, Kings, Tulare, Kern, and Madera Counties.<\/p>\n

Score: (-2)<\/strong><\/span><\/p>\n

-Not established (0) Pest never detected in California, or known only from incursions.<\/p>\n

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

-High (-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: (Score)<\/p>\n

Final Score: <\/em><\/strong>\u00a0Score of Consequences of Introduction \u2013 Score of Post Entry Distribution and Survey Information = 11<\/span>.<\/strong><\/em><\/p>\n

Uncertainty: \u00a0<\/strong><\/h5>\n

Presently, in California, Ganoderma adspersum<\/em> has only been found in almond, prune, and almond on peach rootstock.\u00a0 The fungus has a wide host range, but it is not known if other hosts, in particular those in natural environments of California, have been infected or will be infected by the almond isolate of the fungus.\u00a0 Future information on its distribution may alter the numerical score but less likely, the proposed rating.<\/p>\n

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

Based on the evidence provided above the proposed rating for Ganoderma adspersum<\/em> is B.<\/strong><\/span><\/p>\n

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

A<\/strong>grios, G. N.\u00a0 2005.\u00a0 Plant Pathology Fifth Edition.\u00a0 Elsevier Academic Press.\u00a0 922 p.<\/p>\n

D<\/strong>e Simone, D., and T. Annesi.\u00a0 2012. Occurrence of Ganoderma adspersum<\/em> on Pinus pinea<\/em>.\u00a0 Phytopathologia Mediterranea 51: 374-382.<\/p>\n

C<\/strong>ABI.\u00a0 2017.\u00a0 \u00a0Ganoderma adspersum<\/em> basic datasheet. http:\/\/www.cabi.org\/cpc\/datasheet\/24922<\/a><\/p>\n

F<\/strong>arr, D. F., and A. Y. Rossman.\u00a0 2017.\u00a0 Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. Retrieved March 8, 2017, from http:\/\/nt.ars-grin.gov\/fungaldatabases\/<\/a><\/p>\n

G<\/strong>ottlieb A. M., B. O Saidman, and J. E. Wright, 1998. Isoenzymes of Ganoderma <\/em>species from southern South America. Mycological Research <\/em>102, 415\u2012426.<\/p>\n

P<\/strong>app, V. and I. Szab\u00f3. \u00a02013.\u00a0 Distribution and host preferences of poroid Basidiomycete in Hungary I. \u2013 Ganoderma<\/em>.\u00a0 Acta Silv. Lingn. Hung. 9: 71-83.\u00a0 DOI: 10.2478\/aslh-2013-0006<\/em><\/p>\n

R<\/strong>izzo, D.\u00a0 2017a. Email from David Rizzo, University of California, Davis, to Cheryl Blomquist, CDFA, sent Wednesday, January 25, 2017 6:09 am, forwarded to John Chitambar, CDFA, Wednesday, January 25, 2017 8:03:08 am.<\/p>\n

R<\/strong>izzo, D.\u00a0 2017b. Email from David Rizzo, University of California, Davis to John Chitambar, CDFA, Tuesday, March 7, 2017 12:33 pm.<\/p>\n

S<\/strong>inclair, W. A., and H. H. Lyon.\u00a0 2005.\u00a0 Diseases of trees and shrubs second edition.\u00a0 Comstock Publishing Associates, a division of Cornell University Press, Ithaca and London.\u00a0 660 p.<\/p>\n

T<\/strong>ortic, M.\u00a0 1971.\u00a0 Ganoderma adspersum<\/em> (s. Schulz.) Donk (Ganoderma europaeum<\/em> Steyaert) and its distribution in Yugoslavia.\u00a0 Acta Botanica Croatica. 30: 113-118.<\/p>\n

U<\/strong>SDA PCIT.\u00a0 2017.\u00a0 USDA Phytosanitary Certificate Issuance & Tracking System.\u00a0 https:\/\/pcit.aphis.usda.gov\/PExD\/faces\/ReportHarmOrgs.jsp<\/a>.<\/p>\n

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

John J. Chitambar, Primary Plant Pathologist\/Nematologist, California Department of Food and Agriculture, 3294 Meadowview Road, Sacramento, CA 95832. Phone: 916-262-1110, 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:
\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: B<\/strong><\/h3>\n
\n

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

\u00a0California Pest Rating for Ganoderma adspersum (Schulzer) Donk Pest Rating: B PEST RATING PROFILE Initiating Event: On January 25, 2017, Dr. David Rizzo, Professor, Department of Plant Pathology, University of California, Davis, notified CDFA of his detection of Ganoderma adspersum in almond orchards in the San Joaquin Valley, during surveys which initiated during fall 2015, … Continue reading Ganoderma adspersum (Schulzer) Donk<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1117,"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":[8,4],"tags":[156,539,45],"class_list":["post-3501","post","type-post","status-publish","format-standard","hentry","category-fungi","category-plant-pathology","tag-fungus","tag-ganoderma-adspersum","tag-plant-pathogen"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5l8vQ-Ut","jetpack-related-posts":[{"id":8135,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=8135","url_meta":{"origin":3501,"position":0},"title":"Ganoderma brownii (Murrill) Gilb. 1961","author":"Heather.Martin","date":"March 4, 2021","format":false,"excerpt":"California Pest Rating for Ganoderma brownii (Murrill) Gilb. 1961Pest Rating: C DOWNLOAD PEST RATING *NOTE\u00a0 You must be registered and logged in to post a comment. 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Bostock, Professor, Department of Plant Pathology, University of California, Davis, of a fungal pathogen, Fusarium brachygibbosum, detected in cold-stored, bare-root nursery\u2026","rel":"","context":"In "Fungi"","block_context":{"text":"Fungi","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=8"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6246,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=6246","url_meta":{"origin":3501,"position":2},"title":"Septocyta ruborum (Lib.) Petrak. 1967","author":"Heather.Martin","date":"July 24, 2019","format":false,"excerpt":"California Pest Rating for Septocyta ruborum (Lib.) Petrak. 1967(syn. Rhabdospora ramealis (Roberge ex Desm.) Sacc.)Pest Rating: C download pest rating Responsible Party: Heather J. Scheck, CDFA Primary Plant Pathologist\/Nematologist. 204 West Oak Ave, Lompoc, CA93463. 805-736-8050. plant.health[@]cdfa.ca.gov. *NOTE: You must be registered and logged in to post a comment. If\u2026","rel":"","context":"In "C-Rated"","block_context":{"text":"C-Rated","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=671"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4307,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=4307","url_meta":{"origin":3501,"position":3},"title":"Diaporthe pseudophoenicicola R. R. Gomes, C. Glienke & Crous 2013","author":"Admin","date":"December 29, 2017","format":false,"excerpt":"California Pest Rating for Diaporthe pseudophoenicicola R. R. Gomes, C. Glienke & Crous 2013 Pest Rating: C PEST RATING PROFILE Initiating Event: On June 15, 2017, a shipment of an unknown plant, exhibiting symptoms of leaf spotting and destined to a commercial florist in Los Angeles County, was intercepted by\u2026","rel":"","context":"In "Fungi"","block_context":{"text":"Fungi","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=8"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1262,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1262","url_meta":{"origin":3501,"position":4},"title":"Geosmithia pallida (G. Sm.) M. Kolar\u00edk, Kub\u00e1tov\u00e1 & Paotov\u00e1","author":"Admin","date":"October 28, 2015","format":false,"excerpt":"California Pest Rating for Geosmithia pallida (G. Sm.) M. Kolar\u00edk, Kub\u00e1tov\u00e1 & Paotov\u00e1 \u00a0Pest Rating: \u00a0C PEST RATING PROFILE Initiating Event: During August 2014, The CDFA Pathology Laboratory received official samples of diseased oak trees exhibiting symptoms of foaming cankers, collected from residential and commercial landscape sites in Marin and\u2026","rel":"","context":"In "Fungi"","block_context":{"text":"Fungi","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=8"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":13309,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=13309","url_meta":{"origin":3501,"position":5},"title":"Polystigma amygdalinum Cannon, 1996 almond red leaf blotch","author":"Heather Martin","date":"September 30, 2024","format":false,"excerpt":"California Pest Rating Profile for Polystigma amygdalinum Cannon, 1996 almond red leaf blotchPest Rating:\u00a0B 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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