2008 Reports
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| Codling Moth Monitoring in Mating Distrupted Apple Orchards: Development of Trap Thresholds and Prediction of Fruit Injury, Year 3, by Diane Alston, Extension Entomologist, and Marion Murray, IPM Project Leader, USU |
Three codling moth lures were tested in mating-disrupted Utah apple orchards to determine a threshold for treatment based on fruit injury. The DA-Combo lures caught the most moths and, along with the DA lure, was better than the 10x lure at predicting fruit injury. Examples of thresholds developed: for 0.5% fruit injury threshold, treat when 10 moths are caught in the DA-Combo lure and 1 moth is caught in the DA lure; for 5% injury, treat when 100 moths are caught in the DA-Combo lure and when 10 moths are caught in the DA lure.
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2007 Reports
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| Codling Moth Monitoring in Mating Distrupted Apple Orchards: Development of Trap Thresholds and Prediction of Fruit Injury, Year 2, by Diane Alston, Extension Entomologist, USU |
Of the four codling moth lures tested, the DA-Combo lures caught the most moths and, along with the DA lure, was the best predictor of fruit injury. (The other lures tested were 10x and 1x.) In addition, Alston found that the threshold developed in the Pacific Northwest of 5 moths/week using a DA-Combo lure is resonable for use in Utah.
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| 2007 Western Cherry Fruit Fly Control Trial: Attraction of Adults to GF-120 Insecticide Bait Droplets by Addition of Potential Attractants, by Diane Alston, Extension Entomologist, USU and Thor Lindstrom, Horticulture Research Associate, USU |
Four different attractants (ammonium acetate, urea, torula yeast, and concentrate cherry juice) plus GF-120 were compared to standard GF-120 and an untreated control. There was no difference in control of fruit fly among any of the GF-120 treatments. All GF-120 treatments provided better control than the untreated.
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| Enhancement of Attraction of Western Cherry Fruit Fly (Rhagoletis indifferens) to Yellow Sticky Traps, by Diane Alston, Extension Entomologist, USU |
Twelve different attractants plus an untreated control were used on yellow sticky traps in cherry orchards to determine effectiveness for trapping adult cherry fruit flies. Of the thirteen treatments, ammonium hydroxide and ammonium carbonate attracted the most adults.
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| Utah Onion Thrips Efficacy Insecticide Trial: Influence of Egg Hatch, Survival, and Immigration on Insecticide Importance in Dry Bulb Onion, by Diane Alston, Extension Entomologist, USU |
The efficacy of six insecticides (including two new compounds) of varying rates were compared for suppression of three thrips life stages. No differences among insecticides were detected for adults, while Lannate (methomyl) and Radiant (spinetoram) were most effective against larvae, and Lannate and Movento (spirotetramat) were most effective against eggs.
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| Control Trial of Woolly and Green Apple Aphid in Apple Tree Canopies, by Diane Alston, Extension Entomologist, USU, and Thor Lindstrom, Horticulture Research Associate, USU |
A new, as-yet unregistered insecticide (Movento, a spirotetramat) was shown to effectively reduce populations of woolly and green apple aphids for up to eight weeks after treatment as compared to horticultural oil, Guthion, and untreated.
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| Control Trial of Woolly Apple Aphid Galling in Apple Tree Roots, by Diane Alston, Extension Entomologist, USU, and Thor Lindstrom, Horticulture Research Associate, USU |
The systemic insecticide, spirotetramat (Movento 150SC or Ultor 150SC), at a 12 oz/acre rate was shown to be more effective at suppressing woolly apple aphid galls on apple root sucker root systems than the same product at 8 oz/acre and an untreated control. A single 12 oz/acre treatment applied at petal fall provided the same level of control as two 12 oz/acre treatments (at petal fall and 33 days later).
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2006 Reports
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| Codling Moth Monitoring in Mating Disrupted Apple Orchards, Year 1, by Diane Alston, Extension Entomologist, USU |
In comparing the effectiveness of three codling moth adult trap lures in mating disrupted apple orchards in 2006, Alston found that the CM-DA Combo lure (Pherocon®) was the most effective lure and also provided the best prediction of fruit injury for the season totals.
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| Codling Moth Control with Rimon (Novaluron) and Other Reduced Risk Insecticides, by Diane Alston, Extension Entomologist and Thor Lindstrom, Horticulture Research Associate, USU |
This study evaluated the effectiveness of Rimon, Assail, and Calypso in the control of codling moth on apples. There was no difference among treatments, however there is early indication that Rimon is toxic to predatory mites.
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| Western Cherry Fruit Fly Control Trial: Can Addition of Adult Attractants Enhance the Efficacy of GF-120? by Diane Alston, Extension Entomologist and Thor Lindstrom, Horticulture Research Associate, USU |
Researchers found that the addition of 10% ammonium acetate to GF-120 reduced the number of larvae in mature fruit as compared to GF-120 alone, but that the injury rate was similar to that found when using Success and Provado treatments. The study also looked at treatment effects on mites and beneficial arthropods.
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2005 Reports
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| Western Cherry Fruit Fly Control Trial: Evaluation of Dow GF-120 NF and Fruit Fly Bait Concentration, by Diane Alston, Extension Entomologist and Thor Lindstrom, Horticulture Research Associate, USU |
This 2005 study showed that fruit fly bait concentration influenced WCFF adult attraction and retention in plots. More adults were caught on traps in GF-120 and untreated control plots sprayed with 40% than 20% bait. In contrast, bait concentration did not influence larval infestation of fruits.
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| Onion Thrips Control Trial, by Diane Alston, Extension Entomologist, USU |
The efficacy of new and alternative insecticides for suppression of onion thrips in dry bulb onions were studied in 2005, and results showed that Success, Mustang, and BYI 8330 at 8 oz/acre had the lowest cumulative numbers of eggs and immatures as compared to the other insecticides and the untreated control.
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| Evaluation of Rimon Phytotoxicty on Apples With and Without Oil, by Diane Alston, Extension Entomologist and Thor Lindstrom, Horticulture Research Associate, USU |
In 2005, a four-application novaluron (Rimon 0.83 EC) program at two rates with and without horticultural oil showed no symptoms of phytotoxicity to apple leaves or fruit.
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| Codling Moth Control with Rimon (Novaluron), by Diane Alston, Extension Entomologist and Thor Lindstrom, Horticulture Research Associate, USU |
A four-application novaluron (Rimon 0.83 EC) program for first and second generation codling moth on apples showed that eight percent of the fruit in the Rimon plot had codling moth stings versus almost 23% for the untreated, and larval entry injury affected only 0.1% of the treated versus 3.3% of the control fruit.
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| Reduced Risk Pest Management Systems for US Tart Cherry Production, Year 2 Report, by Diane Alston, Extension Entomologist |
This study evaluated several alternative insect management options to reduce the use of organophosphates. |
2004 Reports
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- Imidacloprid Chemigation for Control of the California Prionus Beetle in Utah Sweet Cherry Orchards, by Shawn Steffan, Diane Alston, and Mike Pace, USU
- Western Cherry Fruit Fly Control Trial: Evaluation of Alternatives for Western Cherry Fruit Fly Control in On-Farm Trials, by Thor Lindstrom and Diane Alston, USU
- Area-Wide Survey of Tree Fruit Pests Including Nurseries in Utah, by James Pitts and Diane Alston, USU
- Area-Wide Survey of Tree Fruit Borers Including Nurseries in Utah, by James Pitts and Diane Alston, USU
- Factors That Influence Spray Coverage of Orchard Trees, by Shawn Steffan, USU
- Control of Codling Moth and Other Pear Arthropods with Novaluron and Evaluation of Novaluron for Phytotoxicity to Pear and Apple, by Diane Alston, Thor Lindstrom, and Shawn Steffan, USU
- Evaluation of Insecticides for Woolly Apple Aphid Control in Apple in Utah, by Diane Alston and Thor Lindstrom, USU
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2003 Reports
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