PNW Insect Pest Management Handbook<\/a> for available chemical control options.<\/span><\/p>\nThresholds<\/span><\/strong><\/p>\n\nTreat if 10 aphids for every two- to six-leaf seedling.<\/span><\/li>\nTreat if 10\u201320 aphids per stem or head (from boot to heading stage).<\/span><\/li>\n<\/ul>\nPrevention and management<\/span><\/strong><\/p>\n\nConsider beneficials <\/span>(p<\/span>arasitic wasps, syrphid larvae (hoverflies), lacewing larvae, lady beetles) <\/span>when deciding whether or not to apply an insecticide. Individual aphids that are parasitized appear brown to gold.<\/li>\nRemoval of volunteer plants that may act as insect reservoirs when crop host is not present.<\/span><\/li>\nAvoid planting into the previously infested ground; allow two weeks before planting.<\/span><\/li>\nAphid populations are susceptible to rainy, windy weather, and sudden cold. Unseasonal high temperatures from April through June can reduce aphid populations quite effectively.<\/li>\n<\/ul>\n2021 Aphid Efficacy Trial<\/strong><\/p>\nThis is the second year of field evaluation of Transform\u00ae WG insecticide at two rates 0.75 and 1.5 oz\/acre vs potential competitors (e.g. Sivanto) for aphid management in grass grown for seed. Data collected during Spring 2020 indicated that both rates of Transform\u00ae WG insecticide rapidly knocked down the aphid populations with a consistent low aphid counts in treated plots for up to four weeks after application. Data collection during Spring 2021 is underway. Results will be available soon!<\/p>\n
<\/p>\nSpring 2021 Aphid Efficacy Trial in Tall Fescue.<\/figcaption><\/figure>\n\u00a0<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"[aesop_image img=”https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/4316\/files\/2021\/04\/IMG_8078-tall-fescue-trial-scaled.jpg” panorama=”off” align=”center” lightbox=”on” captionsrc=”custom” captionposition=”left” revealfx=”off” overlay_revealfx=”off”] Aphid management in grass grown for seed production Aphid flights occurring in spring & fall each year can infest newly planted grass seedlings and established fields. Winged forms colonize fields in irregular patterns, often according to prevailing wind direction and wind-blocking features along field margins. … Continue reading 2021 Aphid Efficacy Trial in Tall Fescue<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":10298,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-488","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/posts\/488","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/users\/10298"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/comments?post=488"}],"version-history":[{"count":10,"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/posts\/488\/revisions"}],"predecessor-version":[{"id":503,"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/posts\/488\/revisions\/503"}],"wp:attachment":[{"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/media?parent=488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/categories?post=488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/fieldcropsentomology\/wp-json\/wp\/v2\/tags?post=488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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