Mite Pests of Southern Highbush Blueberry in Florida

Liburd, Oscar E.; Lopez, Lorena; Phillips, Douglas A.

doi:10.32473/edis-in1284-2020

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…To the best of our knowledge, there have been no studies indicating any cultivar susceptibility to SRM infestations and the grower survey demonstrated that the diversity of blueberry cultivars in the same farm was not significantly related to the mite damage encountered by the growers surveyed. However, SRM has been detected in blueberry leaf samples of 'Farthing', 'Avanti', 'Arcadia', 'Meadowlark', and 'KeyCrisp', sent to our laboratory facilities in Gainesville, FL in 2019 and 2020, and varietal preference may be identified in future studies [12]. Oligonychus ilicis can cause economic damage in blueberry production if infestations are not detected and suppressed early in the season [20].…”

Section: Discussionmentioning

confidence: 99%

“…In SHB, O. ilicis reproduce on the leaf's lower surface, leaving a waxy and white accumulation of sheds after large populations have been established. Most SRMs are found in the mid to lower branches and start moving up the foliage as the populations grow [12]. The main symptom associated with SRM injury in ornamental and fruit crops, including SHB, is bronzed-colored leaves, as well as followed by plant stunting, and flower and fruit malformations.…”

Section: Introductionmentioning

confidence: 99%

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Miticidal Tools for Management of Southern Red Mites Infesting Southern Highbush Blueberries

Lopez

Liburd

2023

Insects

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Tetranychid outbreaks have been detected since 2016 in southern highbush blueberries (SHB); however, it was not until 2019 that the southern red mite (SRM), Oligonychus ilicis (Acari: Tetranychidae) was confirmed as the pest causing severe bronzing and stunting, in multiple Florida and Georgia commercial blueberry plantings. To date, only three miticides (fenazaquin, fenpyroximate, and acequinocyl) have been registered for use in SHB and there are no clear guidelines on how to manage SRM in SHB. Similarly, there is no knowledge regarding the existence of natural enemies of SRM in SHB. This is the first report of naturally occurring predatory mites (Amblyseius sp. and Neoseiulus ilicis) associated with SRM in SHB. Predatory mites were recorded in blueberry bushes after treatment with seven miticides used to suppress SRM populations including spiromesifen, acequinocyl, sulfur, sulfur + molasses, bifenazate, fenpyroximate, and fenazaquin. The number of SRM recorded per leaf and averaged plant damage ratings (0 = no bronzing–4 = 100% bronzing) were used to evaluate miticide efficacy. Additionally, the presence or absence of predatory mites per sample was recorded. Fenpyroximate used as the standard miticide, significantly reduced mite numbers seven days after application, as well as acequinocyl and fenazaquin. Fenpyroximate and fenazaquin demonstrated the best performance for managing O. ilicis on SHB and treated bushes demonstrated significantly less bronzing compared with the control plants. These miticides were also safe to naturally occurring predatory mites. Lastly, the level of growers’ awareness regarding SRM was assessed using surveys in 2020 to design adequate educational materials available to the grower community.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Miticidal Tools for Management of Southern Red Mites Infesting Southern Highbush Blueberries

Lopez

Liburd

2023

Insects

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“…However, the unintended impacts of calendar‐based chemical management, 6 such as insecticide resistance, 7 indicate that alternative strategies are required. Additionally, a growing list of secondary pest outbreaks including putnam scale, Diaspidiotus ancylus Putnam (Hemiptera: Diaspididae), in highbush blueberry along the East Coast (D. Polk, personal communication); southern red mite, Oligonychus ilicis McGregor (Trombidiformes: Tetranychidae), in southern highbush blueberry in Florida 8,9 ; and blueberry stem gall wasps, Hemadas nubilipennis (Hymenoptera: Pteromalidae), in Michigan blueberries (R. Isaacs, personal communication), indicate that continuing intensive and exclusive chemical management of D. suzukii is ecologically unsustainable 10 . Unlike conventional management programs, which often solely employ chemical pesticide applications, integrated pest management (IPM) relies on a suite of tactics to reduce pest damage, in addition to chemical control as required 11 .…”

Section: Introductionmentioning

confidence: 99%

Automated aerosol puffers effectively deliver 1‐OCTEN‐3‐OL, an oviposition antagonist useful against spotted‐wing drosophila

Stockton

Wallingford

Dong

et al. 2020

Pest Management Science

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BACKGROUND: Automated aerosol puffers releasing behaviorally active volatile organic compounds can deter insect pests in crops. During 2016, we tested the efficacy of aerosol puffer arrays emitting 1-octen-3-ol at reducing Drosophila suzukii oviposition in fall-bearing raspberries in Western New York State. During 2017, we compared the performance of aerosol puffers with a passive diffusion release method (vial dispensers), as well as puffer timing and placement within the field. RESULTS: During 2016, we found that octenol application in the field via aerosol puffer systems resulted in a 20% decrease in D. suzukii oviposition compared to control plots. During 2017, we found that aerosol puffers releasing octenol were 42-55% more effective than vial dispensers at deterring oviposition. We also found that a discontinuous application of octenol during dawn and dusk was sufficient to deter D. suzukii oviposition equivalent to continuous applications throughout the day. Although we observed no differences in infestation depending on puffer placement, low fly populations at the time of the trial may have affected the data. CONCLUSIONS: Our data indicate that automated aerosol puffer systems may reduce D. suzukii infestation to a greater extent than vial dispensers. If adopted, a discontinuous puffer release schedule may protect both economic and ecological interests by reducing the amount of material required to achieve efficacy. Further research on puffer placement is needed to determine whether perimeter applications are effective in larger scale field research and in combination with attractants as part of a push-pull management system.

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Miticidal Tools for Management of Southern Red Mites Infesting Southern Highbush Blueberries

Lopez¹,

Liburd²

2023

Preprint

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Tetranychid outbreaks have been detected since 2016 in southern highbush blueberries (SHB); however, it was not until 2019 when the southern red mite (SRM), Oligonychus ilicis (Acari: Tetranychidae) was confirmed as the pest causing severe bronzing and stunting, in multiple Florida and Georgia commercial blueberry plantings. There is little known about the management of SRM in SHB and only three miticides (fenazaquin, fenpyroximate, and acequinocyl), have recently been registered for use in SHB between 2019 and 2020. Similarly, there is no knowledge regarding the existence of natural enemies of SRM in SHB. This is the first report of naturally occurring predatory mites (Amblyseius sp. and Neoseiulus ilicis) associated with SRM in SHB. Predatory mites were recorded in treated bushes after evaluating the performance of seven miticides used to manage SRM populations including spiromesifen, acequinocyl, sulfur, sulfur + molasses, bifenazate, fenpyroximate, and fenazaquin. 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). Additionally, the presence or absence of predatory mites per sample was recorded. Fenpyroximate used as the standard miticide, significantly reduced mite numbers seven days after application, as well as acequinocyl and fenazaquin. Only plants treated with fenpyroximate or fenazaquin showed significantly less bronzing compared with the control plants. Overall, fenpyroximate and fenazaquin demonstrated the best performance for managing O. ilicis on SHB and safe to naturally occurring predatory mites. Lastly, the level of growers’ awareness regarding SRM was assessed using surveys in 2020 to design adequate educational materials available to the grower community.

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Mite Pests of Southern Highbush Blueberry in Florida

Cited by 4 publications

References 5 publications

Miticidal Tools for Management of Southern Red Mites Infesting Southern Highbush Blueberries

Miticidal Tools for Management of Southern Red Mites Infesting Southern Highbush Blueberries

Automated aerosol puffers effectively deliver 1‐OCTEN‐3‐OL, an oviposition antagonist useful against spotted‐wing drosophila

Miticidal Tools for Management of Southern Red Mites Infesting Southern Highbush Blueberries

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