Abstract
Reports of severe infestations caused by southern red mites (SRM), Oligonychus ilicis 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. Oligonychus ilicis 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 O. ilicis 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 O. ilicis on SHB.
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Claims 5
Claim · model-written summary
Southern red mite injury produced purple or bronzed, dry, rough blueberry leaves.
Verbatim
e0“Characteristic symptoms of leaf injury included purple or bronzed leaf color, leaf dryness and roughening.”
t0“Southern Highbush Blueberries”
e1“southern red mites (SRM)”
Claim · model-written summary
Fenpyroximate significantly reduced mite numbers three days after application.
- Taxon
- Southern Highbush Blueberriest0
- Treatment
- Fenpyroximatee0
- Interactor
- southern red mitese1pest
- Outcome
- mite numberse0
- Direction
- reducede0
- Qualifier
- three days after applicatione0
Not reportedComparator
Verbatim
e0“Fenpyroximate significantly reduced mite numbers three days after application.”
t0“Southern Highbush Blueberries”
e1“southern red mites (SRM)”
Claim · model-written summary
Treatment with fenpyroximate significantly reduced blueberry leaf bronzing relative to control.
Verbatim
e0“plants treated with fenpyroximate or fenazaquin showed significantly less bronzing compared with the control plants.”
t0“Southern Highbush Blueberries”
e1“southern red mites (SRM)”
Claim · model-written summary
Treatment with fenazaquin significantly reduced blueberry leaf bronzing relative to control.
Verbatim
e0“plants treated with fenpyroximate or fenazaquin showed significantly less bronzing compared with the control plants.”
t0“Southern Highbush Blueberries”
e1“southern red mites (SRM)”
Claim · model-written summary
Fenpyroximate and fenazaquin had the best overall performance against O. ilicis.
- Taxon
- SHBe0
- Treatment
- fenpyroximate and fenazaquine0
- Interactor
- O. ilicis
Oligonychus ilicise0pest - Outcome
- best performancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fenpyroximate and fenazaquin showed the best performance for the management of O. ilicis on SHB.”
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.