{"id":9698,"date":"2017-08-23T13:12:08","date_gmt":"2017-08-23T13:12:08","guid":{"rendered":"https:\/\/www.purdue.edu\/fnr\/extension\/?p=9698"},"modified":"2023-04-24T14:43:03","modified_gmt":"2023-04-24T18:43:03","slug":"question-what-options-do-we-have-to-treat-our-ash-trees-against-the-emerald-ash-borer","status":"publish","type":"post","link":"https:\/\/www.purdue.edu\/fnr\/extension\/question-what-options-do-we-have-to-treat-our-ash-trees-against-the-emerald-ash-borer\/","title":{"rendered":"Question: What options do we have to treat our ash trees against the Emerald Ash Borer?"},"content":{"rendered":"

\"Emerald<\/a>Imidacloprid, the active ingredient works by killing adults when they feed in the summer before they lay eggs. It slowly kills the two youngest stages of grubs that feed beneath the bark. The later and larger two stages are not killed. Material applied in the fall does not start killing beetles until spring. It takes twice the dose in the fall to get the same effect as a spring application. Trees with a trunk diameter of >20 inches at 4.5 ft above the ground can’t be controlled with imidacloprid.<\/p>\n

So if your trees are starting to die I would suggest you skip the fall application of imidacloprid and switch to a professional injection of emamectin benzoate. See Management of EAB<\/a>, Purdue Extension Emerald Ash Borer<\/a>, for more information.<\/p>\n

Resources:
\n<\/strong>What to do about emerald ash borer<\/a>, Got Nature?, Purdue Extension-FNR
\nEmerald Ash Borer<\/a>, Purdue Extension-Entomology
\nEAB research: Saving trees early less costly than replacing them<\/a>, Purdue Agriculture News<\/p>\n

Cliff Sadof
\nPurdue Extension – Entomology<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Imidacloprid, the active ingredient works by killing adults when they feed in the summer before they lay eggs. It slowly kills the two youngest stages of grubs that feed beneath the bark. The later and larger two stages are not killed. Material applied in the fall does not start killing beetles until spring. It takes […]<\/p>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42,80,47,53,55],"tags":[],"class_list":["post-9698","post","type-post","status-publish","format-standard","hentry","category-forestry","category-trees","category-invasiveinsects","category-urbanforestry","category-woodproductsmanufacturing","audience-for-enthusiasts","audience-for-homeowners","audience-for-landowners","audience-for-professionals"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t