{"id":648,"date":"2018-05-18T14:56:45","date_gmt":"2018-05-18T22:56:45","guid":{"rendered":"http:\/\/blogs.oregonstate.edu\/vegnet\/?p=648"},"modified":"2020-11-04T11:34:01","modified_gmt":"2020-11-04T19:34:01","slug":"pest-report-week-7","status":"publish","type":"post","link":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/2018\/05\/18\/pest-report-week-7\/","title":{"rendered":"Pest Report &#8211; Week 7"},"content":{"rendered":"<p>WEEK 7 &#8211;<\/p>\n<ul>\n<li><span style=\"color: #333399\"><strong>Seed corn maggot<\/strong><\/span>&nbsp; &#8211; Poor emergence may be a sign of underground feeding by seedcorn maggots, which are the immature stage of <em>Delia platura. <\/em>Plants are most susceptible at seedling stage. Host plants include: corn, green and broad beans, onion, brassicas, peas, pepper, potato, spinach, and beet.\n<ul>\n<li>SCM is especially attracted to newly-tilled soil with high organic matter \/ manure inputs.<\/li>\n<li>They have multiple, overlapping generations per year. This image by U. of Illinois highlights how adults, eggs, and maggots may all be present at the same time.<\/li>\n<li>If emergence is low, scout 2-ft row sections for seed damage and white, tapered maggots that look very similar to cabbage maggot. Both species favor cool conditions for egg-laying, but <em>D. platura<\/em> are more active as adults in warm weather.<\/li>\n<li>There is a fascinating biological (fungal) control for SCM that alters the fly&#8217;s behavior:&nbsp; It causes the flies to settle on tips of grain stems or high-up flowers and die, which increases dispersal of the fungus to spread farther.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li><strong><span style=\"color: #800080\">Seed bugs<\/span><\/strong> <span style=\"color: #800080\"><span style=\"color: #000000\">&#8211; There have been recent complaints of high numbers of &#8216;small, flying insects&#8217; in both urban and rural areas since mid-April. The bugs are 3-4mm with elongate bodies and wing covers with 4-5 veins. Experts agree that the taxonomy of this group is in need of a major revision, so they are usually referenced to genus level only. <\/span><\/span>\n<ul>\n<li><span style=\"color: #800080\"><span style=\"color: #000000\">More than half of all known <em>Nysius <\/em><\/span><\/span><span style=\"color: #800080\"><span style=\"color: #000000\">species<\/span><\/span><span style=\"color: #800080\"><span style=\"color: #000000\"> are from Hawaii, including the endemic <\/span><\/span><span style=\"color: #800080\"><span style=\"color: #000000\">w\u0113kiu bug<\/span><\/span><span style=\"color: #800080\"><span style=\"color: #000000\">, that migrates to the summit of Mauna Kea each year.<br \/>\n<\/span><\/span><\/li>\n<li><em>Nysius<\/em> spp. are seed predators and tend to be less selective then other, related&nbsp; <span class=\"bgpage-taxon-desc\">Lygaeidae. Extensive damage can occur in wheat, quinoa, canola, and sorghum. Occasional feeding can occur on ornamentals, other cereals, and tomatoes. <\/span><\/li>\n<li><span class=\"bgpage-taxon-desc\">Similar to boxelder bugs, they are attracted to large, sunny, white buildings, which has led to n<\/span>uisance reports by homeowners. Various Ask-an-Expert questions have been submitted, one of which I was able to identify <a href=\"https:\/\/ask.extension.org\/questions\/449630\">last week<\/a> as <em>Nysius, <\/em>probably<em> N. raphanus. <\/em>The high numbers we are seeing now is likely the result of overwintered nymphs maturing into active, winged adults. There are 4-7 generations per year.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>WEEK 7 &#8211; Seed corn maggot&nbsp; &#8211; Poor emergence may be a sign of underground feeding by seedcorn maggots, which are the immature stage of Delia platura. Plants are most susceptible at seedling stage. Host plants include: corn, green and broad beans, onion, brassicas, peas, pepper, potato, spinach, and beet. SCM is especially attracted to&hellip; <a href=\"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/2018\/05\/18\/pest-report-week-7\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":8003,"featured_media":0,"comment_status":"open","ping_status":"open","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":"Pest Report - Week 7","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":[135500,1254492,1254147,1253489],"tags":[],"class_list":["post-648","post","type-post","status-publish","format-standard","hentry","category-cabbage-maggot","category-onion","category-pest-id","category-snap-beans"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8vBJ4-as","_links":{"self":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts\/648","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/users\/8003"}],"replies":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/comments?post=648"}],"version-history":[{"count":12,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts\/648\/revisions"}],"predecessor-version":[{"id":1266,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/posts\/648\/revisions\/1266"}],"wp:attachment":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/media?parent=648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/categories?post=648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/tags?post=648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}