{"id":4159,"date":"2017-09-20T14:51:05","date_gmt":"2017-09-20T21:51:05","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=4159"},"modified":"2024-04-26T10:55:31","modified_gmt":"2024-04-26T17:55:31","slug":"plasmopara-constantinescui-voglmayr-thines-2007","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=4159","title":{"rendered":"Plasmopara constantinescui Voglmayr &#038; Thines 2007"},"content":{"rendered":"<h5 style=\"text-align: center;\"><strong>California Pest Rating for<\/strong><\/h5>\n<h5 style=\"text-align: center;\"><strong><em>Plasmopara constantinescui<\/em><\/strong><strong> Voglmayr &amp; Thines 2007<\/strong><\/h5>\n<h5 style=\"text-align: center;\"><strong>Pest Rating: B<\/strong><\/h5>\n<hr \/>\n<h5 style=\"text-align: center;\"><strong>PEST RATING PROFILE<\/strong><\/h5>\n<p><strong style=\"font-size: 18px;\">Initiating Event:<\/strong><\/p>\n<p>On August 8, 2017, diseased leaves of <em>Impatiens walleriana<\/em> plants were collected, from a retail nursery in Placer County, by Placer Agricultural County officials and sent to the CDFA Plant Pathology Laboratory for diagnoses.\u00a0 The plants had been shipped from a different nursery in San Joaquin County.\u00a0 Cheryl Blomquist, CDFA plant pathologist, identified the downy mildew pathogen, <em>Plasmopara constantinescui<\/em>, as the cause for the disease.\u00a0 The pathogen was assigned a temporary \u2018Q\u2019 rating.\u00a0 Consequently, the infected plants, received at Placer County, will be destroyed by County officials (Walber, 2017).\u00a0 <em>Impatiens walleriana<\/em> plants related to the shipment from San Joaquin County were double-bagged and disposed at a landfill, by the nursery (Khan, 2017).\u00a0 The risk of introduction and establishment of this pathogen in California is assessed and a permanent rating is herein proposed.<\/p>\n<h5><strong>History &amp; Status:<\/strong><\/h5>\n<p><strong><u>Background:<\/u><\/strong> \u00a0\u00a0<em>Plasmopara constantinescui<\/em> is an obligate oomycete plant pathogen that causes downy mildew disease in its host plants.\u00a0 Presently, the host range for the pathogen only includes <em>Impatiens<\/em> species, belonging to the plant family Balsaminaceae.<\/p>\n<p><em>Plasmopara constantinescui<\/em> was originally described as <em>Bremiella sphaerosperma<\/em> from <em>Impatiens<\/em> in eastern Russia and northeastern North America (Constantinescu, 1991).\u00a0 However, after molecular phylogenetic analyses of DNA sequences, <em>B. sphaerosperma<\/em> was found to belong to the genus <em>Plasmopara<\/em> and transferred there accordingly.\u00a0 Furthermore, as there already existed, within <em>Plasmopara<\/em>, a species by the same epithet, the newly-transferred pathogen was given a new epithet, <em>P. constantinescui<\/em> (Voglmayr &amp; Thines, 2007).\u00a0 This species was also shown to be closely related to <em>Plasmopara obducens<\/em>, which is a common, widely distributed pathogen of several species of <em>Impatiens<\/em> in the Northern Hemisphere, including California (Constantinescu, 1991; Voglmayr &amp; Thines, 2007).<\/p>\n<p><em>Hosts:<\/em> \u00a0<em>Impatiens<\/em> sp. (impatiens), <em>I. capensis<\/em> (jewel weed)<em>, I. noli-tangere<\/em> (western touch-me-not)<em>, I. pallida <\/em>(pale touch-me-not) (Constantinescu, 1991; Farr &amp; Rossman, 2017).\u00a0 <em>Plasmopara constantinescui<\/em> was recently detected in <em>Impatiens walleriana<\/em> (buzzy lizzy) plants (see: \u2018Initiating Event\u2019.)<em>\u00a0 <\/em><\/p>\n<p><em>Symptoms<\/em>: \u00a0Pale yellowish to ochre, round to irregular, and scattered spots appear on the upper surface of leaves.\u00a0 These spots are small (1-6 mm-diam.), vein-limited, and with margins that are indistinct to reddish brown or violaceous.\u00a0 They rarely coalesce and cover larger areas.\u00a0 White to greyish or yellowish downy growth of sporangiophores of the oomycete develop in patches on the underside of the spots (Constantinescu, 1991).\u00a0 It is likely that, similar to other downy mildew-causing pathogens, <em>Plasmopara constantinescui<\/em> attacks and spreads rapidly in young, tender green leaf, shoot, and blossom tissue (Agrios, 2005).<\/p>\n<p><strong><u>Disease development<\/u>:<\/strong> Generally, downy mildew pathogens overwinter as thick-walled resting spores called oospores in plant debris in the soil or on weed hosts, and as mycelium in infected, but not dead, twigs.\u00a0 Downy mildew develops and is severe under conditions that favor periods of prolonged leaf wetness and high relative humidity during cool or warm, but not hot, periods.\u00a0 During rainy period in spring, the oospores germinate to produce a sporangium.\u00a0 The sporangium or its zoospores are transmitted by wind or water to wet leaves near the ground where they infect through stomata of the lower leaf surface.\u00a0 Mycelium develops and spreads into intercellular spaces of leaves.\u00a0 When it reaches the sub-stomatal cavity, it forms a cushion from which sporangiophores arise and grow through the stoma.\u00a0 Sporangia are produced at the tips of the sporangiophores and are transmitted by wind or rain to nearby non-infected plants (Agrios, 2005; Daughtrey <em>et al<\/em>., 1995).\u00a0 In pathogenicity tests, <em>Plasmopara constantinescui<\/em> was able to cause systemic shoot infection of <em>Impatiens walleriana<\/em> (<em>Personal communication: Suzanne Latham, CDFA plant pathologist<\/em>).<\/p>\n<p><em>Dispersal and spread:<\/em> Wind, rain\/water splash, infected plants and infected plant debris.<\/p>\n<p><em>Damage Potential: <\/em>While estimates of crop losses caused particularly by <em>Plasmopara constantinescui<\/em> have not been reported, generally, downy mildews can cause significant losses in short periods of time. Affected plants may result in defoliation, flower drop, and stem rot, similar to <em>Impatiens walleriana<\/em> plants infected with the closely related downy mildew species, <em>P. obducens<\/em> (Crouch <em>et al.,<\/em> 2014).\u00a0 Nurseries, private and public gardens, and landscape plantings may be at particular risk of contracting downy mildew disease caused by <em>P. constantinescui<\/em>.\u00a0 Fungicidal control of the pathogen is possible, but may be difficult.\u00a0 Under cool wet weathers, downy mildews are often uncontrollable and checked only when the weather turns dry and hot (Agrios, 2005).<\/p>\n<p><strong><u>Worldwide Distribution<\/u>:<\/strong> <em>Asia<\/em>: Eastern Russia (formerly USSR); <em>North America<\/em>: Canada, USA (Indiana, Massachusetts, Wisconsin, Iowa, Maryland, Minnesota, Virginia, South Carolina, and California) (Constantinescu, 1991; Farr &amp; Rossman, 2017; Voglmayr &amp; Thines, 2007; <em>CDFA Pest and Damage Record 2017<\/em>).<\/p>\n<p><strong><u>Official Control<\/u>:<\/strong> \u00a0<em>Bremiella sphaerosperma<\/em> (synonym of <em>Plasmopara constantinescui<\/em>) is on the \u2018Harmful Organism List\u2019 for Brazil (USDA PCIT, 2017).\u00a0 Presently, <em>P. constantinescui<\/em> has a Q rating in California.<\/p>\n<p><strong><u>California Distribution<\/u>:<\/strong> \u00a0Based on the source of diseased Impatiens, <em>Plasmopara constantinescui<\/em> is present in San Joaquin County<\/p>\n<p><strong><u>California Interceptions<\/u>:<\/strong> \u00a0One intrastate interception in Placer County (<em>see<\/em>: Initiating Event).<\/p>\n<p>The risk <em>Plasmopara constantinescui<\/em> would pose to California is evaluated below.<\/p>\n<h5><strong>Consequences of Introduction:\u00a0 <\/strong><\/h5>\n<p><strong>1)\u00a0<\/strong><strong>Climate\/Host Interaction: <\/strong>The downy mildew oomycete, <em>Plasmopara constantinescui<\/em> requires prolonged periods of leaf wetness and high relative humidity during cool or warm, but not hot, periods. These conditions for infection and development of the pathogen is likely to limit its establishment in California, to coastal regions in particular.<\/p>\n<p>Evaluate if the pest would have suitable hosts and climate to establish in California.<\/p>\n<p><strong>Score:<\/strong><span style=\"color: #008000;\"><strong> 2<\/strong><\/span><\/p>\n<p style=\"padding-left: 30px;\">&#8211; Low (1) Not likely to establish in California; or likely to establish in very limited areas.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211; <strong>Medium (2)<\/strong> may be able to establish in a larger but limited part of California.<\/span><\/p>\n<p style=\"padding-left: 30px;\">&#8211; High (3) likely to establish a widespread distribution in California.<\/p>\n<p><strong>2) Known Pest Host Range:<\/strong> The host range for the pathogen is limited to <em>Impatiens<\/em><\/p>\n<p>Evaluate the host range of the pest.<\/p>\n<p><strong>Score: <span style=\"color: #008000;\">1 <\/span><\/strong><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211; <strong>Low (1)<\/strong> has a very limited host range.<\/span><\/p>\n<p style=\"padding-left: 30px;\">&#8211; Medium (2) has a moderate host range.<\/p>\n<p style=\"padding-left: 30px;\">&#8211; High (3) has a wide host range.<\/p>\n<p><strong>3) Pest Dispersal Potential: <\/strong>Spores are produced in abundance. The pathogen is transmitted via infected plant material, winds, and rain\/water splash.<\/p>\n<p>Evaluate the natural and artificial dispersal potential of the pest.<\/p>\n<p><strong>Score:<\/strong> <span style=\"color: #008000;\"><strong>3 <\/strong><\/span><\/p>\n<p style=\"padding-left: 30px;\">&#8211; Low (1) does not have high reproductive or dispersal potential.<\/p>\n<p style=\"padding-left: 30px;\">&#8211; Medium (2) has either high reproductive or dispersal potential.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211; <strong>High (3)<\/strong> has both high reproduction and dispersal potential.<\/span><\/p>\n<p><strong>4) Economic Impact: <\/strong>If left uncontrolled, downy mildews can cause significant losses in short periods of time. Affected plants may result in defoliation, flower drop, and stem rot, thereby lowering crop yield and value in increasing production costs largely due to administration of control measures.\u00a0 Fungicidal control of the pathogen is possible, but may be difficult.\u00a0 Under cool wet weathers, downy mildews are often uncontrollable and checked only when the weather turns dry and hot.<\/p>\n<p>Evaluate the economic impact of the pest to California using the criteria below.<\/p>\n<p><strong>Economic Impact:<\/strong> <span style=\"color: #008000;\"><strong>A, B, C, D.<\/strong><\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong>A<\/strong>. The pest could lower crop yield.<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong>B<\/strong>. The pest could lower crop value (includes increasing crop production costs).<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong>C<\/strong>. The pest could trigger the loss of markets (includes quarantines).<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong>D<\/strong>. The pest could negatively change normal cultural practices.<\/span><\/p>\n<p style=\"padding-left: 30px;\">E. The pest can vector, or is vectored, by another pestiferous organism.<\/p>\n<p style=\"padding-left: 30px;\">F. The organism is injurious or poisonous to agriculturally important animals.<\/p>\n<p style=\"padding-left: 30px;\">G. The organism can interfere with the delivery or supply of water for agricultural uses.<\/p>\n<p><strong>Economic Impact Score<\/strong>: \u00a0<span style=\"color: #008000;\"><strong>3<\/strong><\/span><\/p>\n<p style=\"padding-left: 30px;\">&#8211; Low (1) causes 0 or 1 of these impacts.<\/p>\n<p style=\"padding-left: 30px;\">&#8211; Medium (2) causes 2 of these impacts.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211; <strong>High (3)<\/strong> causes 3 or more of these impacts.<\/span><\/p>\n<p><strong>5) Environmental Impact: <\/strong>\u00a0Downy mildew disease caused <em>by Plasmopara constantinescui<\/em> could significantly impact home\/urban, private and public gardens, and landscape plantings.<\/p>\n<p>Evaluate the environmental impact of the pest on California using the criteria below.<\/p>\n<p><strong>Environmental Impact: <span style=\"color: #008000;\">E<\/span><\/strong><\/p>\n<p style=\"padding-left: 30px;\">A. The pest could have a significant environmental impact such as lowering biodiversity, disrupting natural communities, or changing ecosystem processes.<\/p>\n<p style=\"padding-left: 30px;\">B. The pest could directly affect threatened or endangered species.<\/p>\n<p style=\"padding-left: 30px;\">C. The pest could impact threatened or endangered species by disrupting critical habitats.<\/p>\n<p style=\"padding-left: 30px;\">D. The pest could trigger additional official or private treatment programs.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong>E<\/strong>. The pest significantly impacts cultural practices, home\/urban gardening or ornamental plantings<\/span><\/p>\n<p><strong>Environmental Impact Score: <span style=\"color: #008000;\">2<\/span><\/strong><\/p>\n<p style=\"padding-left: 30px;\">&#8211; Low (1) causes none of the above to occur.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211;<strong> Medium (2)<\/strong> causes one of the above to occur.<\/span><\/p>\n<p style=\"padding-left: 30px;\">&#8211; High (3) causes two or more of the above to occur.<\/p>\n<h5><strong>Consequences of Introduction to California for <em>Plasmopara constantinescui:<\/em><\/strong><\/h5>\n<p>Add up the total score and include it here. <span style=\"color: #008000;\"><strong>11 <\/strong><\/span><\/p>\n<p style=\"padding-left: 30px;\">-Low = 5-8 points<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211;<strong>Medium<\/strong> = 9-12 points<\/span><\/p>\n<p style=\"padding-left: 30px;\">-High = 13-15 points<\/p>\n<p><strong>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<p><span style=\"color: #008000;\"><strong><em>Evaluation is \u2018<\/em><\/strong><\/span><strong><span style=\"color: #008000;\">Low\u2019<\/span>.\u00a0 <\/strong>Based on the source of diseased Impatiens, <em>Plasmopara constantinescui<\/em> is only present in San Joaquin County.<\/p>\n<p><strong>Score: <span style=\"color: #008000;\">(-1)<\/span><\/strong><\/p>\n<p style=\"padding-left: 30px;\">-Not established (0) Pest never detected in California, or known only from incursions.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211;<strong>Low (-1)<\/strong> Pest has a localized distribution in California, or is established in one suitable climate\/host area (region).<\/span><\/p>\n<p style=\"padding-left: 30px;\">-Medium (-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<p style=\"padding-left: 30px;\">-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<h5>Final Score:<\/h5>\n<p><strong>7) The final score is<\/strong> the consequences of introduction score minus the post entry distribution and survey information score: (Score)<\/p>\n<p><strong><em>Final Score: <\/em><\/strong><em>\u00a0Score of Consequences of Introduction \u2013 Score of Post Entry Distribution and Survey Information <strong>= <span style=\"color: #008000;\">10<\/span>.<\/strong><\/em><\/p>\n<h5><strong>Uncertainty: \u00a0<\/strong><\/h5>\n<p><em>None.<\/em><\/p>\n<h5><strong>Conclusion and Rating Justification: <\/strong><\/h5>\n<p>Based on the evidence provided above <strong>the proposed rating for <em>Plasmopara constantinescui<\/em> is <span style=\"color: #008000;\">B<\/span>.<\/strong><\/p>\n<h5><strong>References:<\/strong><\/h5>\n<p><strong>A<\/strong>grios, G. N.\u00a0 2005.\u00a0 Plant Pathology fifth edition.\u00a0 Elsevier Academic Press, Massachusetts, USA.\u00a0 922 p.<\/p>\n<p><a href=\"http:\/\/www.calflora.org\/\" target=\"_blank\" rel=\"noopener\"><strong>C<\/strong>alflora<\/a>.\u00a0 2017.\u00a0 Information on California plants for education, research and conservation. [web application]. 2017. Berkeley, California. The Calflora Database [a non-profit organization]. \u00a0<a href=\"http:\/\/www.calflora.org\/\" target=\"_blank\" rel=\"noopener\">http:\/\/www.calflora.org\/<\/a><\/p>\n<p><strong>Constantinescu, O.<\/strong> 1991. <strong><em>Bremiella sphaerosperma<\/em><\/strong> sp. nov. and <strong><em>Plasmopara borreriae<\/em><\/strong> comb. nov. Mycologia 83: 473-479.<\/p>\n<p><strong>Crouch, J. A., M. P. Ko, and J. M. McKemy.\u00a0 2014.\u00a0 First report of impatiens downy mildew outbreaks caused by Plasmopara obducens through the Hawai\u2019ian Islands.\u00a0 Plant Disease, 98: 696.\u00a0 DOI: <\/strong><a href=\"https:\/\/doi.org\/10.1094\/PDIS-10-13-1017-PDN\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1094\/PDIS-10-13-1017-PDN<\/a><\/p>\n<p><strong>D<\/strong>aughtrey, M. L., R. L. Wick, and J. L. Peterson.\u00a0 1995.\u00a0 Downey mildews.\u00a0 Part I. infectious diseases, diseases caused by fungi.\u00a0 Compendium of flowering potted plant diseases.\u00a0 APS Press, the American Phytopathological Society.\u00a0 38-38 p.<\/p>\n<p><strong>F<\/strong>arr, D. F., and A. Y. Rossman.\u00a0 2017.\u00a0 Fungal Databases, U. S. National Fungus Collections, ARS, USDA. Retrieved September 7, 2017, from <a href=\"http:\/\/nt.ars-grin.gov\/fungaldatabases\/\" target=\"_blank\" rel=\"noopener\">http:\/\/nt.ars-grin.gov\/fungaldatabases\/<\/a><\/p>\n<p><strong>French, A. M.<\/strong> 1989. California Plant Disease Host Index. California Department of Food and Agriculture, Sacramento (Updated online version by T. Tidwell, May 2, 2017).<\/p>\n<p><strong>K<\/strong>han, S.\u00a0 2017.\u00a0 Email from S. Khan, CDFA Pest Exclusion, to T. Walber, CDFA Interior Pest Exclusion, and J. Chitambar, CDFA, dated 9\/19\/2017. 4:43 pm.<\/p>\n<p><strong>U<\/strong>SDA PCIT.\u00a0 2017.\u00a0 USDA Phytosanitary Certificate Issuance &amp; Tracking System. Retrieved September 7, 2017. 4:19:24 pm CDT.\u00a0 <a href=\"https:\/\/pcit.aphis.usda.gov\/PExD\/faces\/ReportHarmOrgs.jsp\" target=\"_blank\" rel=\"noopener\">https:\/\/pcit.aphis.usda.gov\/PExD\/faces\/ReportHarmOrgs.jsp<\/a>.<\/p>\n<p><strong>Voglmayr, H., and M. Thines. \u00a0<\/strong>2007. \u00a0Phylogenetic relationships and nomenclature of <strong><em>Bremiella sphaerosperma<\/em><\/strong> (Chromista, Peronosporales). Mycotaxon 100: 11-20.<\/p>\n<p>Walber, T.\u00a0 2017.\u00a0 Email from T. Walber, CDFA Interior Pest Exclusion, to J. Chitambar, CDFA, dated 9\/8\/2017, 9:44 am.<\/p>\n<hr \/>\n<h5><strong>Responsible Party:<\/strong><\/h5>\n<p>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<hr \/>\n<h3><strong>Pest Rating: B<\/strong><\/h3>\n<hr \/>\n<p><em>Posted by ls<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>California Pest Rating for Plasmopara constantinescui Voglmayr &amp; Thines 2007 Pest Rating: B PEST RATING PROFILE Initiating Event: On August 8, 2017, diseased leaves of Impatiens walleriana plants were collected, from a retail nursery in Placer County, by Placer Agricultural County officials and sent to the CDFA Plant Pathology Laboratory for diagnoses.\u00a0 The plants had &hellip; <a href=\"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=4159\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Plasmopara constantinescui Voglmayr &#038; Thines 2007<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1117,"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":[8,4],"tags":[156,41,593],"class_list":["post-4159","post","type-post","status-publish","format-standard","hentry","category-fungi","category-plant-pathology","tag-fungus","tag-plant-pathogens","tag-plasmopara-constantinescui"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5l8vQ-155","jetpack-related-posts":[{"id":1176,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1176","url_meta":{"origin":4159,"position":0},"title":"Peronospora belbahrii (Downy mildew of basil)","author":"Admin","date":"October 12, 2015","format":false,"excerpt":"California Pest Rating for Peronospora belbahrii (Downy mildew of basil) Pest Rating: C PEST RATING PROFILE Initiating Event: During June 2014, Cheryl Blomquist, CDFA Plant Pathologist, detected Peronospora belbahrii in basil plants grown in a Nursery in Alameda County.\u00a0 The plants had been purchased from a different nursery in Sebastopol,\u2026","rel":"","context":"In &quot;Fungi&quot;","block_context":{"text":"Fungi","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=8"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4257,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=4257","url_meta":{"origin":4159,"position":1},"title":"Colletotrichum aracearum","author":"Admin","date":"November 29, 2017","format":false,"excerpt":"California Pest Rating for Colletotrichum aracearum L. 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Cai 2016 PEST RATING: B PEST RATING PROFILE Initiating Event: \u00a0 On July 28, 2017, diseased Cymbidium sp. plants exhibiting leaf spots, were detected by the CDFA Dog Team, in a shipment of plants that had originated in and\u2026","rel":"","context":"In &quot;Fungi&quot;","block_context":{"text":"Fungi","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=8"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1590,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1590","url_meta":{"origin":4159,"position":2},"title":"Phytophthora tentaculata Kr\u00f6ber &#038; Marwitz 1993","author":"Admin","date":"February 29, 2016","format":false,"excerpt":"California Pest Rating Proposal for Phytophthora tentaculata Kr\u00f6ber & Marwitz 1993 Pest Rating: B PEST RATING PROFILE Initiating Event:\u00a0 During January 2016, samples of two diseased Diplacus hybrids (monkey flower hybrid varieties) and one of diseased Artemisia palmeri (Palmer sagewort) were collected by Kathleen Kosta, CDFA, from a nursery in\u2026","rel":"","context":"In &quot;Fungi&quot;","block_context":{"text":"Fungi","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=8"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3160,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=3160","url_meta":{"origin":4159,"position":3},"title":"Colletotrichum sansevieriae M. Nakamura &#038; M. Ohzono 2006","author":"Admin","date":"January 9, 2017","format":false,"excerpt":"California Pest Rating for Colletotrichum sansevieriae \u00a0M. Nakamura & M. Ohzono 2006\u00a0 Pest Rating: B PEST RATING PROFILE Initiating Event: On November 11, 2016, diseased Sansevieria sp. plants exhibiting leaf spot symptoms, were intercepted by San Diego County Agricultural officials.\u00a0 The plants had originated in Florida and were destined to\u2026","rel":"","context":"In &quot;Fungi&quot;","block_context":{"text":"Fungi","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=8"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6828,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=6828","url_meta":{"origin":4159,"position":4},"title":"Leptosillia pistaciae (Voglmayr et al.) Voglmayr, comb. nov. 2019","author":"Heather.Martin","date":"February 19, 2020","format":false,"excerpt":"California Pest Rating for Leptosillia pistaciae (Voglmayr et al.) 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