Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various Miticides
Reports of severe infestations caused by southern red mites (SRM), <i>Oligonychus ilicis</i> McGregor (Acari: Tetranychidae), have increased in recent years in southern highbush blueberries (SHB). Currently, there is little known about the management of tetranychids in SHB, and only two...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Insects |
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| Online Access: | https://www.mdpi.com/2075-4450/11/4/233 |
| _version_ | 1797571192940396544 |
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| author | Lorena Lopez Oscar E. Liburd |
| author_facet | Lorena Lopez Oscar E. Liburd |
| author_sort | Lorena Lopez |
| collection | DOAJ |
| description | Reports of severe infestations caused by southern red mites (SRM), <i>Oligonychus ilicis</i> McGregor (Acari: Tetranychidae), have increased in recent years in southern highbush blueberries (SHB). Currently, there is little known about the management of tetranychids in SHB, and only two miticides (fenazaquin and fenpyroximate) have recently been labeled for use in SHB. <i>Oligonychus ilicis</i> has caused up to 80%–100% losses in some blueberry plantings, and growers are looking for management tools for this new pest of blueberries. We report on injury to SHB from <i>O. ilicis</i> and the performance of seven miticides used to manage SRM populations, including spiromesifen, spiromesifen plus surfactant, vegetable oil concentrate, fenazaquin, “proprietary miticide” (referred to as Pro1), bifenazate, and fenpyroximate. Miticide efficacy was rated based on the number of SRM recorded on collected leaves and plant damage ratings using an arbitrary index (from 0 = no bronzing to 4 = 100% bronzing). Characteristic symptoms of leaf injury included purple or bronzed leaf color, leaf dryness and roughening. Fenpyroximate significantly reduced mite numbers three days after application. Additionally, plants treated with fenpyroximate or fenazaquin showed significantly less bronzing compared with the control plants. Overall, fenpyroximate and fenazaquin showed the best performance for the management of <i>O. ilicis</i> on SHB. |
| first_indexed | 2024-03-10T20:36:51Z |
| format | Article |
| id | doaj.art-760834882fe946588954b154ce4e5433 |
| institution | Directory Open Access Journal |
| issn | 2075-4450 |
| language | English |
| last_indexed | 2024-03-10T20:36:51Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj.art-760834882fe946588954b154ce4e54332023-11-19T20:58:31ZengMDPI AGInsects2075-44502020-04-0111423310.3390/insects11040233Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various MiticidesLorena Lopez0Oscar E. Liburd1Entomology and Nematology Department, University of Florida/IFAS, 1881 Natural Area Drive, Gainesville, FL 32611, USAEntomology and Nematology Department, University of Florida/IFAS, 1881 Natural Area Drive, Gainesville, FL 32611, USAReports of severe infestations caused by southern red mites (SRM), <i>Oligonychus ilicis</i> McGregor (Acari: Tetranychidae), have increased in recent years in southern highbush blueberries (SHB). Currently, there is little known about the management of tetranychids in SHB, and only two miticides (fenazaquin and fenpyroximate) have recently been labeled for use in SHB. <i>Oligonychus ilicis</i> has caused up to 80%–100% losses in some blueberry plantings, and growers are looking for management tools for this new pest of blueberries. We report on injury to SHB from <i>O. ilicis</i> and the performance of seven miticides used to manage SRM populations, including spiromesifen, spiromesifen plus surfactant, vegetable oil concentrate, fenazaquin, “proprietary miticide” (referred to as Pro1), bifenazate, and fenpyroximate. Miticide efficacy was rated based on the number of SRM recorded on collected leaves and plant damage ratings using an arbitrary index (from 0 = no bronzing to 4 = 100% bronzing). Characteristic symptoms of leaf injury included purple or bronzed leaf color, leaf dryness and roughening. Fenpyroximate significantly reduced mite numbers three days after application. Additionally, plants treated with fenpyroximate or fenazaquin showed significantly less bronzing compared with the control plants. Overall, fenpyroximate and fenazaquin showed the best performance for the management of <i>O. ilicis</i> on SHB.https://www.mdpi.com/2075-4450/11/4/233tetranychidsmite injurybronzingblueberry plantingsFlorida |
| spellingShingle | Lorena Lopez Oscar E. Liburd Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various Miticides Insects tetranychids mite injury bronzing blueberry plantings Florida |
| title | Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various Miticides |
| title_full | Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various Miticides |
| title_fullStr | Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various Miticides |
| title_full_unstemmed | Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various Miticides |
| title_short | Injury to Southern Highbush Blueberries by Southern Red Mites and Management Using Various Miticides |
| title_sort | injury to southern highbush blueberries by southern red mites and management using various miticides |
| topic | tetranychids mite injury bronzing blueberry plantings Florida |
| url | https://www.mdpi.com/2075-4450/11/4/233 |
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