Abstract
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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Claims 9
Claim · model-written summary
Naturally occurring predatory mites (Amblyseius sp. and Neoseiulus ilicis) were recorded associated with southern red mite in southern highbush blueberry, the first report of this association.
- Taxon
- Southern Highbush Blueberriest0
- Interactor
- Neoseiulus ilicise1biocontrol_agent
- Second interactor
- Oligonychus ilicis
Oligonychus ilicise2pest - Outcome
- naturally occurring predatory mitese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Southern Highbush Blueberries”
e1“This is the first report of naturally occurring predatory mites (Amblyseius sp. and Neoseiulus ilicis) associated with SRM in SHB”
e2“the southern red mite (SRM), Oligonychus ilicis (Acari: Tetranychidae) was confirmed as the pest causing severe bronzing and stunting”
Claim · model-written summary
Predatory mites were recorded in blueberry bushes after treatment with seven miticides.
Verbatim
t0“Southern Highbush Blueberries”
e2“Predatory mites were recorded in blueberry bushes after treatment with seven miticides used to suppress SRM populations”
Claim · model-written summary
Fenpyroximate significantly reduced southern red mite numbers seven days after application.
- Taxon
- Southern Highbush Blueberriest0
- Treatment
- Fenpyroximatee3
- Interactor
- SRMe2pest
- Outcome
- mite numberse3
- Direction
- reducede3
- Qualifier
- seven days after applicatione3
Not reportedComparator
Verbatim
t0“Southern Highbush Blueberries”
e2“Predatory mites were recorded in blueberry bushes after treatment with seven miticides used to suppress SRM populations”
e3“Fenpyroximate used as the standard miticide, significantly reduced mite numbers seven days after application”
Claim · model-written summary
Acequinocyl reduced southern red mite numbers.
- Taxon
- Southern Highbush Blueberriest0
- Treatment
- acequinocyle4
- Interactor
- SRMe2pest
- Outcome
- mite numberse3
- Direction
- reducede3
Not reportedComparator
Verbatim
t0“Southern Highbush Blueberries”
e2“Predatory mites were recorded in blueberry bushes after treatment with seven miticides used to suppress SRM populations”
e3“Fenpyroximate used as the standard miticide, significantly reduced mite numbers seven days after application”
e4“as well as acequinocyl and fenazaquin”
Claim · model-written summary
Fenazaquin reduced southern red mite numbers.
- Taxon
- Southern Highbush Blueberriest0
- Treatment
- fenazaquine4
- Interactor
- SRMe2pest
- Outcome
- mite numberse3
- Direction
- reducede3
Not reportedComparator
Verbatim
t0“Southern Highbush Blueberries”
e2“Predatory mites were recorded in blueberry bushes after treatment with seven miticides used to suppress SRM populations”
e3“Fenpyroximate used as the standard miticide, significantly reduced mite numbers seven days after application”
e4“as well as acequinocyl and fenazaquin”
Claim · model-written summary
Fenpyroximate showed the best performance for managing Oligonychus ilicis on southern highbush blueberry.
- Taxon
- Southern Highbush Blueberriest0
- Treatment
- Fenpyroximatee5
- Interactor
- O. ilicisOligonychus ilicise5pest
- Outcome
- performance for managing O. ilicise5
- Direction
- beste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Southern Highbush Blueberries”
e5“Fenpyroximate and fenazaquin demonstrated the best performance for managing O. ilicis on SHB”
Claim · model-written summary
Fenazaquin showed the best performance for managing Oligonychus ilicis on southern highbush blueberry.
- Taxon
- Southern Highbush Blueberriest0
- Treatment
- fenazaquine5
- Interactor
- O. ilicisOligonychus ilicise5pest
- Outcome
- performance for managing O. ilicise5
- Direction
- beste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Southern Highbush Blueberries”
e5“Fenpyroximate and fenazaquin demonstrated the best performance for managing O. ilicis on SHB”
Claim · model-written summary
Treated bushes showed significantly less bronzing than control plants.
- Taxon
- Southern Highbush Blueberriest0
- Treatment
- treated bushese6
- Interactor
- Oligonychus ilicisOligonychus ilicise7pest
- Outcome
- bronzinge6
- Direction
- lesse6
- Comparator
- control plantse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Southern Highbush Blueberries”
e6“treated bushes demonstrated significantly less bronzing compared with the control plants”
e7“the southern red mite (SRM), Oligonychus ilicis (Acari: Tetranychidae) was confirmed as the pest causing severe bronzing and stunting”
Claim · model-written summary
The miticides were safe to naturally occurring predatory mites.
Verbatim
t0“Southern Highbush Blueberries”
e7“These miticides were also safe to naturally occurring predatory mites”
The same questions in other papers
fenpyroximate · pest · Vaccinium corymbosum (highbush blueberry)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.