{"id":1315,"date":"2010-06-09T10:46:28","date_gmt":"2010-06-09T14:46:28","guid":{"rendered":"https:\/\/extension.umaine.edu\/blueberries\/?page_id=1315"},"modified":"2025-09-10T09:53:14","modified_gmt":"2025-09-10T13:53:14","slug":"cultural-management-for-insects-and-diseases","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/blueberries\/resources\/production\/cultural-management-for-insects-and-diseases\/","title":{"rendered":"253-Cultural and Biological Management for Insects and Diseases in Wild Blueberries"},"content":{"rendered":"

Fact Sheet No.253<\/strong><\/p>\n

\n

Prepared by David E. Yarborough, Extension Blueberry Specialist, The University of Maine, Orono, ME 04469. \u00a0Revised June 2017.<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Insects<\/span><\/strong><\/td>\nMethod<\/span><\/strong><\/td>\nComments<\/span><\/strong><\/td>\n<\/tr>\n<\/thead>\n
Blueberry Maggot<\/td>\nHarvesting<\/td>\nHarvesting techniques that reduce fruit loss can minimize the number of infected fruit left on the plants and on the ground. Avoid edges as higher infestations occur there.\u00a0 Allowing infected fruit to drop before harvest will increase fly populations and future losses.<\/td>\n<\/tr>\n
Clean Winnow Piles<\/td>\nCompost, burn or dispose of winnower refuse or hot spots of fly emergence will be created.<\/td>\n<\/tr>\n
Keep all fields in same cycle<\/td>\nSince 90% of the flies emerge from the previous crop field, having all fields in the same locale will deny flies fruit and reduce maggot infestation.<\/td>\n<\/tr>\n
Flea beetle, Spanworm,
\nSawfly<\/td>\n		Fire pruning<\/td>\nBlueberry litter must be ignited, if too wet then will have incomplete sanitation.<\/td>\n<\/tr>\n
Thrips, Tip midge<\/td>\nFire pruning<\/td>\nBurn curled stems as soon as extensive curling occurs in early spring but before June 1.<\/td>\n<\/tr>\n
Biological Control of Spanworm<\/strong><\/td>\nApply to small early instar larvae for best control. Larval death not immediate, but feeding quickly inhibited. May use when bees pollinating. Do not apply when bees are actively foraging, toxic to bees. Best results occur when applications are made in the evening since sunlight kills the Beauveria spores over time.\u00a0 Do not apply when bees are actively foraging toxic to bees for 3 hours after application.<\/td>\n<\/tr>\n
BT (Bacillus thuringiensis)<\/td>\nMultiple labels<\/strong><\/td>\n<\/tr>\n
Micotrol-0
\n(Beauveria bassiana)<\/td>\n		1 qt.\/acre<\/td>\n<\/tr>\n
Entrust<\/td>\n2 oz.\/acre<\/td>\n<\/tr>\n
Biological Control of Flea Beetle, Strawberry Rootworm<\/td>\nApply at seven to ten day intervals in evening. Flea beetle larvae only.\u00a0 Best results occur when applications are made in the evening since sunlight kills the Beauveria spores over time. Do not apply when bees are actively foraging, toxic to bees.\u00a0 Do not apply when bees are actively foraging toxic to bees for 3 hours after application.<\/td>\n<\/tr>\n
Micotrol-0
\n(Beauveria bassiana)<\/td>\n		1 qt.\/acre<\/td>\n<\/tr>\n
Entrust<\/td>\n2 oz.\/acre<\/td>\n<\/tr>\n
Insects<\/strong><\/td>\nMethod<\/strong><\/td>\nComments<\/strong><\/td>\n<\/tr>\n
Monilinia Blight<\/td>\nFire pruning<\/td>\nBlueberry litter must be ignited, if too wet then will have incomplete sanitation. Burning can decrease approximately 50% of mummies. \u00a0A two-inch layer of mulch put down in prune year will prevent germination of mummies in the following year.<\/td>\n<\/tr>\n
Control of Monilinia Blight<\/strong><\/td>\n\u00a0Apply at bud break and repeat every seven to ten days as needed. Please see labels for particular requirements for each material.<\/td>\n<\/tr>\n
Regalia<\/strong> (extract of Reynoutria sachalinensis<\/em>)<\/td>\n1\u00a0to\u00a04 qt.\/50 to 100 gallons per acre<\/td>\n<\/tr>\n
Serenade Max (Bacillus subtilis)<\/em><\/td>\n1 to 3 lbs.\/acre<\/td>\n<\/tr>\n
Valdensia<\/td>\nSpot burn<\/td>\nBURN the\u00a0diseased area<\/strong> and a 10 ft. area outside the edge of the infected stems. \u00a0All leaf litter must be burned to ensure eradication of disease.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

Information\u00a0in this publication is provided purely for educational purposes. No responsibility is assumed for any problems associated with the use of\u00a0products\u00a0or services mentioned. No endorsement of products or companies is intended, nor is\u00a0criticism\u00a0of unnamed products or companies implied.<\/i><\/span><\/p>\n

\u00a9 1994, 2004, 2017<\/span><\/p>\n

Call 800.287.0274 (in Maine), or 207.581.3188, for information on publications and program offerings from University of Maine Cooperative Extension, or visit\u00a0<\/b>extension.umaine.edu<\/b><\/span><\/a>.<\/b><\/span><\/p>\n

The University of Maine is an EEO\/AA employer, and does not discriminate on the grounds of race, color, religion, sex, sexual orientation, transgender status, gender expression, national origin, citizenship status, age, disability, genetic information or veteran\u2019s status in employment, education, and all other programs and activities. The following person has been designated to handle inquiries regarding non-discrimination policies: Director of Equal Opportunity, 101 Boudreau Hall, University of Maine, Orono, ME 04469-5754, 207.581.1226, TTY 711 (Maine Relay System).<\/i><\/p>\n","protected":false},"excerpt":{"rendered":"

Fact Sheet No.253 Prepared by David E. Yarborough, Extension Blueberry Specialist, The University of Maine, Orono, ME 04469. \u00a0Revised June 2017. Insects Method Comments Blueberry Maggot Harvesting Harvesting techniques that reduce fruit loss can minimize the number of infected fruit left on the plants and on the ground. Avoid edges as higher infestations occur there.\u00a0 […]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":18627,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-1315","page","type-page","status-publish","hentry"],"yoast_head":"\n253-Cultural and Biological Management for Insects and Diseases in Wild Blueberries - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/extension.umaine.edu\/blueberries\/resources\/production\/cultural-management-for-insects-and-diseases\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"253-Cultural and Biological Management for Insects and Diseases in Wild Blueberries - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Fact Sheet No.253 Prepared by David E. 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