{"id":2033,"date":"2016-06-02T07:00:08","date_gmt":"2016-06-02T14:00:08","guid":{"rendered":"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=2033"},"modified":"2024-05-06T13:29:49","modified_gmt":"2024-05-06T20:29:49","slug":"tylenchorhynchus-spp-cobb-1913","status":"publish","type":"post","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=2033","title":{"rendered":"Tylenchorhynchus spp.  Cobb, 1913"},"content":{"rendered":"<p><a href=\"http:\/\/blogs.cdfa.ca.gov\/Section3162\/?attachment_id=2065\" rel=\"attachment wp-att-2065\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2065\" data-permalink=\"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?attachment_id=2065\" data-orig-file=\"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/1524089-stunt-nematode_symptoms-stunting-of-corn-seedling-NorthCarolinaUniv-bugwood.jpg?fit=812%2C561&amp;ssl=1\" data-orig-size=\"812,561\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"stunt nematode: symptoms, stunting of corn seedling\" data-image-description=\"&lt;p&gt;Image ID: 1524089&lt;br \/&gt;\nSource: Department of Plant Pathology , North Carolina State University, Bugwood.org&lt;br \/&gt;\nURL: &lt;a href=&quot;http:\/\/www.forestryimages.org\/browse\/detail.cfm?imgnum=1524089&quot; target=&quot;_blank&quot; rel=&quot;noopener noreferrer&quot;&gt;http:\/\/www.forestryimages.org\/browse\/detail.cfm?imgnum=1524089&lt;\/a&gt;&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/1524089-stunt-nematode_symptoms-stunting-of-corn-seedling-NorthCarolinaUniv-bugwood.jpg?fit=474%2C327&amp;ssl=1\" class=\"aligncenter size-full wp-image-2065\" src=\"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/1524089-stunt-nematode_symptoms-stunting-of-corn-seedling-NorthCarolinaUniv-bugwood.jpg?resize=474%2C327\" alt=\"stunt nematode: symptoms, stunting of corn seedling\" width=\"474\" height=\"327\" srcset=\"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/1524089-stunt-nematode_symptoms-stunting-of-corn-seedling-NorthCarolinaUniv-bugwood.jpg?w=812&amp;ssl=1 812w, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/1524089-stunt-nematode_symptoms-stunting-of-corn-seedling-NorthCarolinaUniv-bugwood.jpg?resize=300%2C207&amp;ssl=1 300w\" sizes=\"auto, (max-width: 474px) 100vw, 474px\" \/><\/a><\/p>\n<h5 style=\"text-align: center;\"><strong>California Pest Rating for<\/strong><\/h5>\n<h5 style=\"text-align: center;\"><strong><em>Tylenchorhynchus <\/em><\/strong><strong>spp.&nbsp; Cobb, 1913<\/strong><\/h5>\n<h5 style=\"text-align: center;\"><strong>Pest Rating: C&nbsp;<\/strong><\/h5>\n<p>&nbsp;<\/p>\n<hr>\n<h5 style=\"text-align: center;\"><strong>PEST RATING PROFILE<\/strong><\/h5>\n<h5><strong>Initiating Event: <\/strong><\/h5>\n<p>During the 1950-60s, several species of plant parasitic nematodes were given a \u2018D\u2019 rating as they were regarded as parasites, predators or organisms of little or no economic importance that did not require State enforced regulatory action.&nbsp; However, these nematode species were inaccurately assigned a D rating as most, if not all, are plant parasitic and therefore, capable of damaging plant production and causing significant economic losses especially at the county and local residential\/grower level.&nbsp; Furthermore, the detection of plant parasitic nematodes in nursery stock may be an indication of contamination in violation of the State\u2019s standard of pest cleanliness required for nurseries. <em>Tylenchorhynchus <\/em>spp<em>.<\/em> were originally rated D.&nbsp; The risk of infestation and permanent rating of this genus group are re-assessed here.<\/p>\n<h5><strong>History &amp; Status:<\/strong><\/h5>\n<p><strong><u>Background<\/u><\/strong>:&nbsp; Generally, pest risk assessments and assignment of pest ratings are conducted <em>per<\/em> individual pest species and not <em>per<\/em> genus group primarily due to differing pest biologies, geographical distributions, host ranges, damage potentials, and risk mitigating requirements. However, an exception to this rule is made here for the genus <em>Tylenchorhynchus<\/em> largely because of historical practice.&nbsp; Over the past several decades, the genus, <em>Tylenchorhynchus<\/em>, was seldom differentiated to species level by CDFA Nematologists mainly due to i) the common occurrence and wide distribution of member species within California, ii) no state enforced regulatory action required subsequent to their detection, and iii) greater demands of time involved in diagnosing high risk and other nematode species considered to be of greater economic importance than those belonging to <em>Tylenchorhynchus<\/em>.<\/p>\n<p>Members of the genus, <em>Tylenchorhynchus<\/em>, are sometimes known as \u2018stunt nematodes\u2019.&nbsp; Species reproduce mainly by amphimixis (fertilization by female and male) producing eggs, three juvenile stages, and adults.&nbsp; These nematodes usually inhabit the soil-root region of plants and feed as obligate migratory ectoparasites of roots using a stylet (sword-like hollow tooth) to feed on epidermal cells. All motile juvenile and adult stages feed.&nbsp; (Mai <em>et al<\/em>., 1996; Maggenti, 1981).<\/p>\n<p style=\"padding-left: 30px;\"><strong><em>Hosts<\/em><\/strong>: <em>Tylenchorhynchus<\/em> spp. are associated with the roots of a wide range of plants including tobacco, cotton, oats, and corn as well as other agricultural crops, fruit trees, ornamentals, nursery stock, forest trees and shrubs, desert shrubs, grasses, and weeds. The host status of associated plants is not always known.<\/p>\n<p style=\"padding-left: 30px;\"><em><strong>Symptoms<\/strong>:&nbsp; <\/em>General plant damage associated with <em>Tylenchorhynchus<\/em> spp. includes stunting of the root system which is expressed aboveground by yellowing of foliage, stunted top growth, and sometimes wilt and defoliation (Maggenti, 1981).<\/p>\n<p style=\"padding-left: 30px;\"><em><strong>Damage Potential<\/strong>: &nbsp;<\/em>Generally, <em>Tylenchorhynchus<\/em> spp. are considered mild pathogens of plants and are common associates of several plants (Norton, 1984).&nbsp; However, plant damage caused by high populations of stunt nematodes may be more significant in small-area plant productions and\/or containerized crops in nursery, residential and local situations than in large acreages and environments such as, pastures, parks, and cultivated fields. Crop losses under field conditions are not reported, however, under experimental conditions, reductions in root and plant growth have been demonstrated by certain species, e.g., <em>T. annulatus<\/em> on sugarcane and Bermuda grass; <em>T. dubius<\/em> on beans (Bridge, 1974; Siddiqi, 1976). &nbsp;<em>Tylenchorhynchus claytoni<\/em> causes economic damage on tobacco (Mai <em>et al<\/em>., 1996).&nbsp; Crop damage under field conditions may be difficult to assess as <em>Tylenchorhynchus<\/em> spp. are often mixed with other genera and\/or two or more stunt nematode species occurring together.<\/p>\n<p style=\"padding-left: 30px;\"><strong><em>Spread<\/em><\/strong>: &nbsp;The main mode of long and short distance spread through artificial means: movement of nematode-contaminated soil, run-off and irrigation water, cultivation tools, equipment and any human activity that can move soils from infested to non-infested sites.<\/p>\n<p><strong><u>Worldwide Distribution<\/u><\/strong>: <em>Tylenchorhynchus<\/em> spp. are distributed worldwide.<\/p>\n<p><strong><u>Official Control<\/u><\/strong>:&nbsp; Currently, <em>Tylenchorhynchus<\/em> spp. are D rated pests in California (see \u2018Initiating Event\u2019).&nbsp; <em>Tylenchorhynchus<\/em> spp. are on the \u2018Harmful Organism Lists\u201d for Australia and the Republic of Nauru (USDA-PCIT, 2016).<\/p>\n<p><strong><u>California Distribution<\/u><\/strong>:&nbsp; <em>Tylenchorhynchus<\/em> spp. are distributed throughout California.<\/p>\n<p><strong><u>California Interceptions<\/u><\/strong>: For the past several decades, <em>Tylenchorhynchus<\/em> spp. have been detected in several imported plant and soil shipments intercepted in California.<\/p>\n<p>The risk <em>Tylenchorhynchus<\/em> spp. would pose to California is evaluated below.<\/p>\n<h5><strong>&nbsp;<\/strong><strong>Consequences of Introduction:<\/strong><\/h5>\n<p><strong>1) <span style=\"text-decoration: underline;\">Climate\/Host Interaction<\/span>:<\/strong> Evaluate if the pest would have suitable hosts and climate to establish in California. Score:<\/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;\">&#8211; Medium (2) may be able to establish in a larger but limited part of California.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211; <strong>High (3)<\/strong> likely to establish a widespread distribution in California.<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong><em>Risk is High (3) <\/em><\/strong><em>\u2013<\/em><\/span>Tylenchorhynchus<span style=\"color: #008000;\"><em> spp<\/em>. <em>are able to establish throughout the State.<\/em><\/span><\/p>\n<p><strong>2) <span style=\"text-decoration: underline;\">Known Pest Host Range<\/span><\/strong>: Evaluate the host range of the pest. Score:<\/p>\n<p style=\"padding-left: 30px;\">&#8211; Low (1) has a very limited host range.<\/p>\n<p style=\"padding-left: 30px;\">&#8211; Medium (2) has a moderate host range.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211; <strong>High (3)<\/strong> has a wide host range.<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong><em>Risk is High (3) <\/em><\/strong><\/span>\u2013Tylenchorhynchus <em>spp.<\/em> <em>are known to be associated with several diverse plant species, however, the host status of associated plants is not always known.<\/em><\/p>\n<p><strong>3)&nbsp;<span style=\"text-decoration: underline;\">Pest Dispersal Potential<\/span><\/strong>: Evaluate the natural and artificial dispersal potential of the pest. Score:<\/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 style=\"padding-left: 30px;\"><strong><em><span style=\"color: #008000;\">Risk is High (3)<\/span> <\/em><\/strong><em>\u2013 The main mode of long and short distance spread through artificial means: movement of contaminated soil, run-off and irrigation water, cultivation tools, equipment and any human activity that can move soils from infested to non-infested sites.&nbsp; Increase in reproduction rates depends on the plant species parasitized.<\/em><\/p>\n<p><strong>4) <span style=\"text-decoration: underline;\">Economic Impact<\/span><\/strong>: Evaluate the economic impact of the pest to California using the criteria below. Score:<\/p>\n<p style=\"padding-left: 30px;\">A. The pest could lower crop yield.<\/p>\n<p style=\"padding-left: 30px;\">B. The pest could lower crop value (includes increasing crop production costs).<\/p>\n<p style=\"padding-left: 30px;\">C. The pest could trigger the loss of markets (includes quarantines).<\/p>\n<p style=\"padding-left: 30px;\">D. The pest could negatively change normal cultural practices.<\/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 style=\"padding-left: 30px;\"><span style=\"color: #008000;\">&#8211; <strong>Low (1)<\/strong> causes 0 or 1 of these impacts.<\/span><\/p>\n<p style=\"padding-left: 30px;\">&#8211; Medium (2) causes 2 of these impacts.<\/p>\n<p style=\"padding-left: 30px;\">&#8211; High (3) causes 3 or more of these impacts.<\/p>\n<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong><em>Risk is Low (1)<\/em><\/strong><\/span><em> \u2013Generally, <\/em>Tylenchorhynchus<em> spp. are considered mild pathogens of plants.&nbsp; However, under high population levels in residential, nurseries and other small-area plantings, <\/em>Tylenchorhynchus<em> spp.<\/em> <em>infections could result in lowered crop yield.<\/em><\/p>\n<p><strong>5) Environmental Impact<\/strong>: Evaluate the environmental impact of the pest on California using the criteria below.<\/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;\">E. The pest significantly impacts cultural practices, home\/urban gardening or ornamental plantings.<\/p>\n<p>Score the pest for Environmental Impact. Score:<\/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<p style=\"padding-left: 30px;\"><span style=\"color: #008000;\"><strong><em>Risk is Medium (2) <\/em><\/strong><\/span><em>\u2013 The impact of<\/em> Tylenchorhynchus <em>spp<\/em>. o<em>n natural environments is most likely not significant as the species is already widespread without causing apparent detriment to ecological balances and processes, however, heavy infestations of spiral nematodes could affect home\/urban gardening. <\/em><\/p>\n<h5><strong>Consequences of Introduction to California for <em>Tylenchorhynchus<\/em> spp<em>.:<\/em><\/strong><\/h5>\n<p>Add up the total score and include it here. (Score)<\/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>Total points obtained on evaluation of consequences of introduction of <em>Tylenchorhynchus<\/em> spp<em>.<\/em> to California = <strong><span style=\"color: #008000;\">(12)<\/span>.<\/strong><\/p>\n<p><strong>6)&nbsp;<span style=\"text-decoration: underline;\">Post Entry Distribution and Survey Information<\/span><\/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. (Score)<\/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;\">-Low (-1) Pest has a localized distribution in California, or is established in one suitable climate\/host area (region).<\/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;\"><span style=\"color: #008000;\">&#8211;<strong>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.<\/span><\/p>\n<p style=\"padding-left: 30px;\"><strong><em><span style=\"color: #008000;\">Evaluation is High (-3)<\/span>.&nbsp; <\/em><\/strong>Tylenchorhynchus <em>spp<\/em>.<em> are widely spread in several contiguous and non-contiguous climate and host regions throughout the state.<\/em><\/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><span style=\"color: #008000;\"><strong><em>Final Score: <\/em><\/strong><\/span><em>&nbsp;Score of Consequences of Introduction \u2013 Score of Post Entry Distribution and Survey Information <strong>=<\/strong> <span style=\"color: #008000;\"><strong>9<\/strong><\/span><\/em><\/p>\n<h5><strong>Uncertainty:&nbsp; <\/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 the spiral nematodes, <em>Tylenchorhynchus<\/em> spp., is C.<\/strong><\/p>\n<h5><strong>References:<\/strong><\/h5>\n<p><strong>B<\/strong>ridge, J.&nbsp; 1974.&nbsp; <em>Tylenchorhynchus dubius.<\/em>&nbsp; Commonwealth Institute of Helminthology (C. I. H.) descriptions of plant-parasitic nematodes. Set 4, No. 51.<\/p>\n<p><strong>M<\/strong>ai, W. F., P. G. Mullin, H. H. Lyon, and K. Loeffler.&nbsp; 1996.&nbsp; Plant parasitic nematodes \u2013 a pictorial key to genera.&nbsp; Fifth Edition.&nbsp; Comstock Publishing Associates a division of Cornell University Press, Ithaca and London.&nbsp; 277 p.<\/p>\n<p><strong>M<\/strong>aggenti, A.&nbsp; 1981.&nbsp; General nematology.&nbsp; Springer-Verlag New York Heidelberg Berlin.&nbsp; 372 p.<\/p>\n<p><strong>N<\/strong>orton, D. C.&nbsp; 1984.&nbsp; Nematode parasites of corn. <em>In<\/em> Plant and Insect Nematodes, edited by W. R. Nickle.&nbsp; Marcel Dekker, Inc.&nbsp; New York and Basel. 61-94 pp.<\/p>\n<p><strong>S<\/strong>iddiqi, M. R.&nbsp; 1976.&nbsp; <em>Tylenchorhynchus annulatus<\/em>.&nbsp; Commonwealth Institute of Helminthology (C. I. H.) descriptions of plant-parasitic nematodes. Set 6, No. 85.<\/p>\n<p><strong>U<\/strong>SDA-PCIT.&nbsp; 2016.&nbsp; United States Department of Agriculture, Phytosanitary Certificate Issuance &amp; Tracking System (PCIT). <a href=\"https:\/\/pcit.aphis.usda.gov\/PExD\/faces\/ViewPExD.jsp\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/pcit.aphis.usda.gov\/PExD\/faces\/ViewPExD.jsp<\/a> .<\/p>\n<hr>\n<h5>Responsible Party:<\/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<h5>Comment Period: <span style=\"color: #ff0000;\">CLOSED<\/span><\/h5>\n<p>The 45-day comment period opened on Jun 2,&nbsp;2016 and&nbsp;closed on Jul 17, 2016.<\/p>\n<hr>\n<h5>Comment Format:<\/h5>\n<p>\u2666 &nbsp;Comments should refer to the appropriate California Pest Rating Proposal Form subsection(s)&nbsp;being commented on, as shown below.<\/p>\n<p style=\"padding-left: 30px;\"><strong><span style=\"text-decoration: underline;\">Example Comment<\/span>:&nbsp;<\/strong><\/p>\n<p style=\"padding-left: 30px;\">Consequences of Introduction: &nbsp;1. Climate\/Host Interaction:&nbsp;[<em>Your comment that relates to \u201cClimate\/Host Interaction\u201d here.<\/em>]<\/p>\n<p>\u2666 &nbsp;Posted comments will not be able to be viewed immediately.<\/p>\n<p>\u2666 &nbsp;Comments may not be posted if they:<\/p>\n<p style=\"padding-left: 30px;\">Contain inappropriate language which is not germane to&nbsp;the pest rating proposal;<\/p>\n<p style=\"padding-left: 30px;\">Contains defamatory, false, inaccurate, abusive, obscene, pornographic,&nbsp;sexually oriented, threatening, racially offensive, discriminatory or illegal&nbsp;material;<\/p>\n<p style=\"padding-left: 30px;\">Violates agency regulations prohibiting sexual harassment or other forms&nbsp;of discrimination;<\/p>\n<p style=\"padding-left: 30px;\">Violates agency regulations prohibiting workplace violence, including threats.<\/p>\n<p>\u2666 &nbsp;Comments may be edited prior to posting to ensure they are entirely germane.<\/p>\n<p>\u2666 &nbsp;Posted comments shall be those which have been approved in content and posted to the&nbsp;website to be viewed, not just submitted.<\/p>\n<hr>\n<h3 style=\"text-align: left;\"><strong>Pest Rating: C<\/strong><\/h3>\n<hr>\n<p style=\"text-align: left;\"><em>Posted by ls&nbsp;<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>California Pest Rating for Tylenchorhynchus spp.&nbsp; Cobb, 1913 Pest Rating: C&nbsp; &nbsp; PEST RATING PROFILE Initiating Event: During the 1950-60s, several species of plant parasitic nematodes were given a \u2018D\u2019 rating as they were regarded as parasites, predators or organisms of little or no economic importance that did not require State enforced regulatory action.&nbsp; However, &hellip; <a href=\"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=2033\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Tylenchorhynchus spp.  Cobb, 1913<\/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_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":[27],"tags":[188,337],"class_list":["post-2033","post","type-post","status-publish","format-standard","hentry","category-nematodes","tag-nematodes","tag-tylenchorhynchus"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5l8vQ-wN","jetpack-related-posts":[{"id":1955,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=1955","url_meta":{"origin":2033,"position":0},"title":"Nematodes","author":"Admin","date":"May 13, 2016","format":false,"excerpt":"(Plant Parasitic Nematodes) Nematodes (also called \u2018roundworms\u2019) are relatively small, multicellular, worm-like animals. They are found in almost every environmental niche imaginable, living free in soil, marine and freshwater habitats while feeding on bacteria, fungi, and nematodes, or as parasites of humans, insects, fish, larger animals and plants. Plant parasitic\u2026","rel":"","context":"In &quot;Ratings&quot;","block_context":{"text":"Ratings","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=333"},"img":{"alt_text":"Nematodes montage","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/05\/nematodes-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\/nematodes-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\/nematodes-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\/nematodes-featured-image.jpg?fit=1038%2C588&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":6389,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=6389","url_meta":{"origin":2033,"position":1},"title":"Paratrichodorus spp. (Siddiqi 1974) and Trichodorus spp. (Cobb 1913)","author":"Heather.Martin","date":"September 4, 2019","format":false,"excerpt":"California Pest Rating for Paratrichodorus spp. (Siddiqi 1974) and Trichodorus spp. (Cobb 1913) 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 you\u2026","rel":"","context":"In &quot;C-Rated&quot;","block_context":{"text":"C-Rated","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=671"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2607,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=2607","url_meta":{"origin":2033,"position":2},"title":"Scutellonema spp.  Cobb, 1913","author":"Admin","date":"September 21, 2016","format":false,"excerpt":"California Pest Rating for Scutellonema spp.\u00a0 Cobb, 1913 Pest Rating: C\u00a0 \u00a0 PEST RATING PROFILE Initiating Event: During the 1950-60s, several species of plant parasitic nematodes were given a \u2018D\u2019 rating as they were regarded as parasites, predators or organisms of little or no economic importance that did not require\u2026","rel":"","context":"In &quot;Nematodes&quot;","block_context":{"text":"Nematodes","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=27"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6906,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=6906","url_meta":{"origin":2033,"position":3},"title":"Xiphinema americanum Cobb, 1913 American dagger nematode","author":"Heather.Martin","date":"February 27, 2020","format":false,"excerpt":"California Pest Rating for Xiphinema americanum Cobb, 1913 American dagger nematodePest Rating: C download pest rating *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 ka","rel":"","context":"In &quot;C-Rated&quot;","block_context":{"text":"C-Rated","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=671"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":9852,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=9852","url_meta":{"origin":2033,"position":4},"title":"Hoplolaimus galeatus (Cobb, 1913) Filipjev &#038; Schuurmans Stekh Lance nematode","author":"Heather.Martin","date":"April 12, 2022","format":false,"excerpt":"California Pest Rating for Hoplolaimus galeatus (Cobb, 1913) Filipjev & Schuurmans Stekh Lance nematodePest Rating: A download pest rating *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 &quot;A-Rated&quot;","block_context":{"text":"A-Rated","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=669"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2029,"url":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?p=2029","url_meta":{"origin":2033,"position":5},"title":"Helicotylenchus spp.  Steiner, 1945","author":"Admin","date":"June 2, 2016","format":false,"excerpt":"California Pest Rating for Helicotylenchus spp.\u00a0 Steiner, 1945 \u00a0Pest Rating: C\u00a0 \u00a0 PEST RATING PROFILE Initiating Event: During the 1950-60s, several species of plant parasitic nematodes were given a \u2018D\u2019 rating as they were regarded as parasites, predators or organisms of little or no economic importance that did not require\u2026","rel":"","context":"In &quot;Nematodes&quot;","block_context":{"text":"Nematodes","link":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/?cat=27"},"img":{"alt_text":"helicotylenchus spp.","src":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/5440548-helicotylenchus_Jonathan-D-Eisenback_VirginiaPolytechnicInstitute-and-StateUniv_Bugwood.org_1.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/5440548-helicotylenchus_Jonathan-D-Eisenback_VirginiaPolytechnicInstitute-and-StateUniv_Bugwood.org_1.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/5440548-helicotylenchus_Jonathan-D-Eisenback_VirginiaPolytechnicInstitute-and-StateUniv_Bugwood.org_1.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blogs.cdfa.ca.gov\/Section3162\/wp-content\/uploads\/2016\/06\/5440548-helicotylenchus_Jonathan-D-Eisenback_VirginiaPolytechnicInstitute-and-StateUniv_Bugwood.org_1.jpg?resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=\/wp\/v2\/posts\/2033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=\/wp\/v2\/users\/1117"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2033"}],"version-history":[{"count":12,"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=\/wp\/v2\/posts\/2033\/revisions"}],"predecessor-version":[{"id":6880,"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=\/wp\/v2\/posts\/2033\/revisions\/6880"}],"wp:attachment":[{"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.cdfa.ca.gov\/Section3162\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}