{"id":28,"date":"2015-04-02T23:49:23","date_gmt":"2015-04-02T23:49:23","guid":{"rendered":"https:\/\/aphidtrek.org\/?page_id=28"},"modified":"2025-01-11T23:00:36","modified_gmt":"2025-01-11T23:00:36","slug":"myzus","status":"publish","type":"page","link":"https:\/\/aphidtrek.org\/?page_id=28","title":{"rendered":"Myzus"},"content":{"rendered":"\n<p><strong><em>Myzus<\/em> Passerini<\/strong><\/p>\n\n\n\n<p>This page updated:&nbsp;January 2025. Most recent updates: addition of taxonomic information on <em>Myzus certus<\/em>.<\/p>\n\n\n\n<p><em>Myzus <\/em>species are mostly introduced to North America from elsewhere.&nbsp; I have several species in my collection and all are introduced to North America, with the possible exception of <em>Myzus cerasi<\/em>, which is common in natural systems on native <em>Prunus<\/em> and <em>Galium<\/em>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"species-list\">Species covered below (click on the name to jump to that species):<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"#m-cerasi\"><em>Myzus cerasi<\/em> (Fabricius)<\/a><\/li>\n\n\n\n<li><a href=\"#m-certus\"><em>Myzus (Nectarosiphon) certus<\/em> (Walker)<\/a><\/li>\n\n\n\n<li><a href=\"#m-linariae\"><em>Myzus <\/em>(<em>Nectarosiphon<\/em>) <em>linariae <\/em>Holman<\/a><\/li>\n\n\n\n<li><a href=\"#m-persicae\"><em>Myzus (Nectarosiphon) persicae<\/em> (Sulzer)<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p id=\"m-cerasi\"><strong><em>Myzus cerasi<\/em> (Fabricius)<\/strong><\/p>\n\n\n\n<p>This is an apparently introduced species in North America, but is one of those that make me wonder whether it in fact has a natural Holarctic distribution.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-cerasi3.jpg\" rel=\"attachment wp-att-908\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-cerasi3-1024x768.jpg\" alt=\"Myzus cerasi on domestic cherry.\" class=\"wp-image-908\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-cerasi3-1024x768.jpg 1024w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-cerasi3-300x225.jpg 300w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-cerasi3-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus cerasi on domestic cherry.<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Although it is best known as the cherry black fly, or cherry aphid, it is also a common find in native undisturbed habitats feeding on both native <em>Prunus<\/em> and native <em>Galium<\/em> (the secondary host).&nbsp; I have few photos of it partly because it has a propensity to be very active after its host material is collected and in a jar.<\/p>\n\n\n\n<p><a href=\"#species-list\">Back to top<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p id=\"m-certus\"><strong><em>Myzus (Nectarosiphon) certus<\/em> (Walker)<\/strong><\/p>\n\n\n\n<p>A valued colleague recently asked me look at some data on specimens of <em>Myzus<\/em>. He has samples from Caryophyllaceae that were reasonable to think might be <em>M. certus<\/em>. Some of his specimens seem to be intermediate in accepted identification keys. The available key characters to separate <em>M. certus<\/em> from <em><a href=\"#m-persicae\">M. persicae<\/a><\/em> are given by <a href=\"https:\/\/aphidsonworldsplants.info\/\" target=\"_blank\" rel=\"noreferrer noopener\">Blackman and Eastop<\/a> as follows (from the <em>Silene<\/em> key):<\/p>\n\n\n\n<p>18. R IV+V in most specimens with only one pair of lateral accessory hairs (plus 0-3 ventral accessory hairs). Value of function CAUDA\/(ANT III \u00d7 PT) in range 0.80-1.52, but rarely more than 1.25 except in small specimens (those with ANT III less than 0.32 mm)\u2026..<em>Myzus persicae<\/em><\/p>\n\n\n\n<p>\u2013 R IV+V in most specimens with two pairs of lateral accessory hairs. Value of function CAUDA\/(ANT III \u00d7 PT) in range 1.2-2.7 (rarely less than 1.25)\u2026..<em>Myzus certus<\/em><\/p>\n\n\n\n<p>Because I&#8217;m generally skeptical about the utility of ratios of lengths in aphid species identification, I thought I&#8217;d lay out all my slides identified as <em>M. persicae<\/em> and calculate this discriminant and count R IV+V hairs on a bunch of them. Below is what I found.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/M-certus-data.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"444\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/M-certus-data.jpg\" alt=\"\" class=\"wp-image-2480\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/M-certus-data.jpg 624w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/M-certus-data-300x213.jpg 300w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/a><figcaption class=\"wp-element-caption\">Example specimens identified as Myzus persicae with the supposed discriminants to separate from Myzus certus.<\/figcaption><\/figure>\n<\/div>\n\n\n<p>A brief glance at these data shows that the discriminants used by Blackman and Eastop do not work for the North American samples I have gathered over the years. D. Hille Ris Lambers (1959) wrote that all morphs of <em>M. certus<\/em> are &#8220;red or reddish&#8221; and that in life <em>M. persicae<\/em> and <em>M. certus<\/em> are &#8220;extremely different.&#8221; This is what I recall from my two samples of <em>M. certus<\/em>, one from <em>Dianthus<\/em> in eastern Oregon (a very dry agricultural area) in March and another from <em>Dianthus<\/em> in western Oregon (a wet urban area) in November. These were dark colored in life, which is what prompted me to consider <em>M. certus<\/em> as the correct species identification back then (these specimens were identified in 1991 and 1992, before Blackman and Eastop&#8217;s biggest works). So, it may be that the only clues we have to recognize <em>M. certus<\/em>, at least in the parts of North America I frequent, is its host plants (usually Caryophyllaceae and sometimes Violaceae) and its brownish color in life. Below I present a photo of one of my slide-mounted specimens, which gives an indication of the dark pigmentation (but bear in mind that <em>M. persicae<\/em> can have dark appendages like this in cold conditions, see below).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/Myzus-certus-apt-AJ1143.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"574\" height=\"583\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/Myzus-certus-apt-AJ1143.jpg\" alt=\"\" class=\"wp-image-2476\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/Myzus-certus-apt-AJ1143.jpg 574w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2025\/01\/Myzus-certus-apt-AJ1143-295x300.jpg 295w\" sizes=\"auto, (max-width: 574px) 100vw, 574px\" \/><\/a><figcaption class=\"wp-element-caption\">An apterous vivipara identified as Myzus certus found on Dianthus in western Oregon on 27 November 1991. Slide #AJ1143.<\/figcaption><\/figure>\n<\/div>\n\n\n<p><a href=\"#species-list\">Back to top<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p id=\"m-linariae\"><strong><em>Myzus <\/em>(<em>Nectarosiphon<\/em>) <em>linariae <\/em>Holman<\/strong><\/p>\n\n\n\n<p>For a few years now, I have been aware of the presence in North America of another European invader, this species <em>Myzus linariae<\/em> that feeds on Dalmatian toadflax, <em>Linaria dalmatica<\/em>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-4.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"424\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-4-e1458525555451-1024x424.jpg\" alt=\"Myzus linariae on its host plant, Dalmatian toadflax (Linaria dalmatica).\" class=\"wp-image-270\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-4-e1458525555451-1024x424.jpg 1024w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-4-e1458525555451-300x124.jpg 300w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-4-e1458525555451-768x318.jpg 768w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-4-e1458525555451-700x290.jpg 700w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus linariae on its host plant, Dalmatian toadflax (Linaria dalmatica).<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"765\" height=\"888\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-1.jpg\" alt=\"Myzus linariae Salmon River iv 2015 1\" class=\"wp-image-271\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-1.jpg 765w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-Salmon-River-iv-2015-1-258x300.jpg 258w\" sizes=\"auto, (max-width: 765px) 100vw, 765px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus linariae from the Salmon River in north-central Idaho.<\/figcaption><\/figure>\n<\/div>\n\n\n<p>It was originally described from Central Europe where it was said to live on this plant in relatively warm and dry locations. For the past few years I have found it across the west in warm and dry locations where its host grows. So far, I know it from Washington, Oregon, Idaho, and Utah. Example localities include dry south facing slopes of the base of Mt. Timpanogos in Utah, on the shores of the Yakima River in central Washington, and along a highway in the high desert of eastern Oregon. It usually fits the key of <a href=\"http:\/\/www.aphidsonworldsplants.info\/\" target=\"_blank\" rel=\"noopener\">Blackman and Eastop<\/a>, easily separated from <em>Myzus persicae<\/em> by the longer tarsi and shorter processus terminalis.<\/p>\n\n\n\n<p>In spring of 2015 I collected some of this species along the Salmon River near White Bird, Idaho.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-1-on-pepper-home-3-v-2015-2.jpg\" rel=\"attachment wp-att-811\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"256\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-1-on-pepper-home-3-v-2015-2-300x256.jpg\" alt=\"Myzus linariae, the adult being the first generation reared on cultivated pepper in our house.\" class=\"wp-image-811\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-1-on-pepper-home-3-v-2015-2-300x256.jpg 300w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-1-on-pepper-home-3-v-2015-2-768x655.jpg 768w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-1-on-pepper-home-3-v-2015-2.jpg 880w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus linariae, the adult being the first generation reared on cultivated pepper in our house.<\/figcaption><\/figure>\n<\/div>\n\n\n<p>At home, I transferred a few specimens to a bell pepper plant purchased from a major retail store.&nbsp; I allowed these specimens to either live or die on the pepper for several weeks.&nbsp; To my surprise, they eagerly reproduced on the pepper, producing what appeared to be normal apterae.&nbsp; After that first generation made up of entirely apterae, the second generation was partly alate &#8212; or at least it tried to be alate.&nbsp; Interestingly, all the alates that matured to adult on the pepper were horrifyingly deformed as in the specimens pictured below, with the wings variously developed into fluid-filled sacs rather than wings.&nbsp; What do you think about that?<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-1.jpg\" rel=\"attachment wp-att-812\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"854\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-1-1024x854.jpg\" alt=\"Myzus linariae, a deformed alate that developed on pepper in our house.\" class=\"wp-image-812\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-1-1024x854.jpg 1024w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-1-300x250.jpg 300w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-1-768x640.jpg 768w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-1.jpg 1047w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus linariae, a deformed alate that developed on pepper in our house.<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-2.jpg\" rel=\"attachment wp-att-813\"><img loading=\"lazy\" decoding=\"async\" width=\"776\" height=\"1024\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-2-776x1024.jpg\" alt=\"Myzus linariae, a deformed alate that developed on pepper in our house.\" class=\"wp-image-813\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-2-776x1024.jpg 776w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-2-227x300.jpg 227w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-2-768x1014.jpg 768w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-linariae-gen-2-on-pepper-home-8-v-2015-2.jpg 810w\" sizes=\"auto, (max-width: 776px) 100vw, 776px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus linariae, a deformed alate that developed on pepper in our house.<\/figcaption><\/figure>\n<\/div>\n\n\n<p><a href=\"#species-list\">Back to top<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p id=\"m-persicae\"><strong><em>Myzus (Nectarosiphon) persicae<\/em> (Sulzer)<\/strong><\/p>\n\n\n\n<p>Although I have dealt with this aphid for almost 30 years, I confess little affection for it.&nbsp; My paid working life was in potato research management and I focused a bit on potato insect management.&nbsp; This aphid, commonly known as green peach aphid, is a major driver of pest management behavior by potato farmers in many parts of the world.&nbsp; I have collected and photographed this species many times in the course of my work. During winter of 2020-21, my small unheated garden greenhouse hosted overwintering <em>Myzus persicae<\/em> on perennial chard. Part way through winter the aphids had survived outside temperatures of about -5 C, so I opened the door and windows hoping this would allow the cold to reach and kill the aphids.&nbsp; As of February 23, aphids were still thriving on exposed young leaves despite brief periods of cold reaching -17 C. As I&#8217;ve seen with other aphids during winter, <em>M. persicae<\/em> become melanistic in these conditions. See photo below.<\/p>\n\n\n\n<p>Now that we live in western Colorado (since 2021) I battle bindweed (<em>Convolvulus arvenis<\/em>) throughout our property. In one portion of our field, which used to be a cattle pasture, the bindweed grew especially lush and thick in 2023. In October I was walking past this patch and absent mindedly tapped on it to see what was living there, expecting the psyllid <a href=\"https:\/\/aphidtrek.org\/?page_id=286\"><em>Bactericera maculipennis<\/em><\/a>. Instead, I found unusually large, bright green (like a Granny Smith apple) aphids that were obviously <em>Myzus<\/em>. Upon slide mounting I had to call them <em>Myzus persicae<\/em>, but my goodness they looked unusual in life. I should have gotten a photo for all 3 of you who read these pages. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2018\/06\/Myzus-persicae-ex-peach-at-home-17-May-2016.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"795\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2018\/06\/Myzus-persicae-ex-peach-at-home-17-May-2016-1024x795.jpg\" alt=\"\" class=\"wp-image-1443\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2018\/06\/Myzus-persicae-ex-peach-at-home-17-May-2016-1024x795.jpg 1024w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2018\/06\/Myzus-persicae-ex-peach-at-home-17-May-2016-300x233.jpg 300w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2018\/06\/Myzus-persicae-ex-peach-at-home-17-May-2016-768x596.jpg 768w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2018\/06\/Myzus-persicae-ex-peach-at-home-17-May-2016-624x484.jpg 624w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2018\/06\/Myzus-persicae-ex-peach-at-home-17-May-2016.jpg 1225w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus persicae in spring on our back yard peach tree.<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-S-dulcamara-Star-7-ix-2102.jpg\" rel=\"attachment wp-att-910\"><img loading=\"lazy\" decoding=\"async\" width=\"758\" height=\"958\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-S-dulcamara-Star-7-ix-2102.jpg\" alt=\"Myzus persicae aptera on the introduced Solanum dulcamara.\" class=\"wp-image-910\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-S-dulcamara-Star-7-ix-2102.jpg 758w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-S-dulcamara-Star-7-ix-2102-237x300.jpg 237w\" sizes=\"auto, (max-width: 758px) 100vw, 758px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus persicae aptera on the introduced Solanum dulcamara.<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-Alate-Jensen.jpg\" rel=\"attachment wp-att-911\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"548\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-Alate-Jensen-1024x548.jpg\" alt=\"Myzus persicae alate vivipara.\" class=\"wp-image-911\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-Alate-Jensen-1024x548.jpg 1024w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-Alate-Jensen-300x161.jpg 300w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-Alate-Jensen-768x411.jpg 768w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-Alate-Jensen.jpg 1625w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus persicae alate vivipara on potato.<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-Cherry-Prosser-x-2010.jpg\" rel=\"attachment wp-att-912\"><img loading=\"lazy\" decoding=\"async\" width=\"753\" height=\"538\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-Cherry-Prosser-x-2010.jpg\" alt=\"Myzus persicae ovipara on cherry in southern Washington in October.\" class=\"wp-image-912\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-Cherry-Prosser-x-2010.jpg 753w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2015\/04\/Myzus-persicae-ex-Cherry-Prosser-x-2010-300x214.jpg 300w\" sizes=\"auto, (max-width: 753px) 100vw, 753px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus persicae ovipara on cherry in southern Washington in October.<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2021\/02\/Myzus-persicae-winter-greenhouse-ii-2021.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"532\" height=\"949\" src=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2021\/02\/Myzus-persicae-winter-greenhouse-ii-2021.jpg\" alt=\"\" class=\"wp-image-1833\" srcset=\"https:\/\/aphidtrek.org\/wp-content\/uploads\/2021\/02\/Myzus-persicae-winter-greenhouse-ii-2021.jpg 532w, https:\/\/aphidtrek.org\/wp-content\/uploads\/2021\/02\/Myzus-persicae-winter-greenhouse-ii-2021-168x300.jpg 168w\" sizes=\"auto, (max-width: 532px) 100vw, 532px\" \/><\/a><figcaption class=\"wp-element-caption\">Myzus persicae apterous vivipara mid-winter on chard in an unheated greenhouse with door and windows open, following frequent low temperature below freezing and minimum of -17 C.<\/figcaption><\/figure>\n<\/div>\n\n\n<p><a href=\"#species-list\">Back to top<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Myzus Passerini This page updated:&nbsp;January 2025. Most recent updates: addition of taxonomic information on Myzus certus. Myzus species are mostly introduced to North America from elsewhere.&nbsp; I have several species in my collection and all are introduced to North America, with the possible exception of Myzus cerasi, which is common in natural systems on native [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":741,"menu_order":9,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-28","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/aphidtrek.org\/index.php?rest_route=\/wp\/v2\/pages\/28","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aphidtrek.org\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aphidtrek.org\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aphidtrek.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aphidtrek.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=28"}],"version-history":[{"count":22,"href":"https:\/\/aphidtrek.org\/index.php?rest_route=\/wp\/v2\/pages\/28\/revisions"}],"predecessor-version":[{"id":2484,"href":"https:\/\/aphidtrek.org\/index.php?rest_route=\/wp\/v2\/pages\/28\/revisions\/2484"}],"up":[{"embeddable":true,"href":"https:\/\/aphidtrek.org\/index.php?rest_route=\/wp\/v2\/pages\/741"}],"wp:attachment":[{"href":"https:\/\/aphidtrek.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}