{"id":23863,"date":"2022-05-05T11:14:46","date_gmt":"2022-05-05T15:14:46","guid":{"rendered":"https:\/\/extension.umaine.edu\/blueberries\/?p=23863"},"modified":"2022-05-05T11:17:41","modified_gmt":"2022-05-05T15:17:41","slug":"monilinia-infections-from-may-3-to-may-5th-2022","status":"publish","type":"post","link":"https:\/\/extension.umaine.edu\/blueberries\/2022\/05\/05\/monilinia-infections-from-may-3-to-may-5th-2022\/","title":{"rendered":"Monilinia infections from May 3 to May 5th 2022"},"content":{"rendered":"

Midcoast<\/strong><\/p>\n

Monilinia cups are still present in the fields as of Monday May 2nd.\u00a0 Some cups were starting to dry up but they were still active cups present.\u00a0 Plants are still susceptible in all of the fields.\u00a0 In Waldoboro, many flowers were close to opening, and there were some open flowers.<\/p>\n

Downeast<\/strong><\/p>\n

Monilinia cups were present in all of the fields checked on Tuesday.\u00a0 Plants are at susceptible stages.<\/p>\n

Monilinia infection<\/strong><\/p>\n

There were conditions for Monilinia infection from Tuesday May 3rd through to early morning on Thursday May 5th in most fields with weather stations.\u00a0 Two monitored fields, Crawford and Eastbrook, had too cold temperatures with not long enough rain to have infection starting on Tuesday; instead both fields had Monilinia infection periods that started on Wednesday May 4th.<\/p>\n

I expect these will be the last Monilinia infections this season considering the warm and dry weather forecast for the next week.\u00a0 I suspect we will start seeing symptoms of past Monilinia infections (from prior weeks) starting next week.\u00a0 If there are no mummy berry cups in your field, applying fungicides after symptoms occur is not recommended.\u00a0 A fungicide application this close to bloom may disrupt bee pollination, since bees do not like the “smell” of some fungicides.\u00a0 Bees transport the spores from tissue killed by mummy berry disease to healthy flowers, and those spores infecting the developing fruit to produce mummy berries. Usually by the time you see symptoms on the plants, the bees have already started transferring the spores to flowers and may have been doing so for days. A fungicide application right before bloom will only decrease flower infection and the number of mummy berries produced but probably not enough to typically warrant the expense of the fungicide.<\/p>\n

If you have applied fungicide after April 26th (7 days) or April 23rd (10 days), your plants would have been protected during this infection period.\u00a0 If you have not applied fungicide, you have approximately 72 hours after the start of the infection period to apply propiconazole or fenbuconazole to possibly decrease infection.<\/p>\n

Botrytis blossom blight<\/strong><\/p>\n

Now is the time to look for Botrytis blossom blight on early developing clones.\u00a0 Conditions, long period of leaf wetness with warmer temperatures, that could have caused Botrytis infection on T5 (almost open) or open flowers did occur in Waldoboro, Hope, Liberty, Ellsworth, Eastbrook and Steuben this week.\u00a0 You will only get infection if the fungus was already present in your fields.\u00a0 Three to seven days after a possible infection is when you should start looking for Botrytis disease.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Location\u00a0<\/strong><\/td>\nReport on MB plot\u00a0<\/strong><\/td>\nInfection period starting Tuesday May 3rd.<\/strong><\/td>\n<\/tr>\n
Waldoboro<\/td>\ncups, starting to dry up<\/td>\n8:20pm<\/td>\n<\/tr>\n
Warren<\/td>\ncups<\/td>\n11:40pm<\/td>\n<\/tr>\n
Hope<\/td>\nnone, bad plots?<\/td>\nMay 4 1am<\/td>\n<\/tr>\n
Liberty<\/td>\ncups<\/td>\n9:30pm<\/td>\n<\/tr>\n
Searsport<\/td>\ncups<\/td>\nyes,\u00a0 station down<\/td>\n<\/tr>\n
Ellsworth<\/td>\ncups<\/td>\n7:20pm<\/td>\n<\/tr>\n
Eastbrook<\/td>\ncups<\/td>\nMay 4 12:30am<\/td>\n<\/tr>\n
Blue hill\/ Sedgewick<\/td>\nno plot<\/td>\nprobably yes, station infrequent<\/td>\n<\/tr>\n
Aurora<\/td>\nno plot<\/td>\nprobably yes,\u00a0 station down<\/td>\n<\/tr>\n
Steuben<\/td>\ncups<\/td>\n9:10pm<\/td>\n<\/tr>\n
Deblois<\/td>\ncups<\/td>\n7:30pm<\/td>\n<\/tr>\n
Montegail<\/td>\ncups<\/td>\nyes, station down<\/td>\n<\/tr>\n
BBHF<\/td>\ncups<\/td>\n10:30pm<\/td>\n<\/tr>\n
Whiting\/E. Machias<\/td>\ncups<\/td>\nyes,\u00a0 leaf wetness monitor down<\/td>\n<\/tr>\n
Crawford<\/td>\ncups<\/td>\nMay 4 7:20pm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Midcoast Monilinia cups are still present in the fields as of Monday May 2nd.\u00a0 Some cups were starting to dry up but they were still active cups present.\u00a0 Plants are still susceptible in all of the fields.\u00a0 In Waldoboro, many flowers were close to opening, and there were some open flowers. Downeast Monilinia cups were […]<\/p>\n","protected":false},"author":117,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","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":""},"categories":[163,164,4],"tags":[],"class_list":["post-23863","post","type-post","status-publish","format-standard","hentry","category-163","category-botrytis","category-mummyberry"],"yoast_head":"\nMonilinia infections from May 3 to May 5th 2022 - 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\/2022\/05\/05\/monilinia-infections-from-may-3-to-may-5th-2022\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monilinia infections from May 3 to May 5th 2022 - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Midcoast Monilinia cups are still present in the fields as of Monday May 2nd.\u00a0 Some cups were starting to dry up but they were still active cups present.\u00a0 Plants are still susceptible in all of the fields.\u00a0 In Waldoboro, many flowers were close to opening, and there were some open flowers. 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