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PETE Insect Development Prediction Model to Limit Codling Moth in Apples

Grant Program: ARP
Agricultural Sector: Fruit
Region: Statewide
Project Duration: 2/1/2007 - 1/31/2009
Amount Awarded: $77,200.00
Lead Organization: Cornell University
Other Organizations: CCE Wayne County, Eve Farm Service, Helena Chemical Company
Project Leader: Deborah Breth
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11/1/09 New York apple growers fight destructive codling moth

Proposal Abstract

The detection rate of codling moth in NY apples compared to other internal fruit feeders has doubled from 30% of larvae found in infested fruit in 2002, to 65% in 2005. If one worm is found in processing fruit at inspection, the processing fruit is diverted to juice reducing its value by 59%. The NY Apple industry is worth $137 M, $30 M of which is processing, excluding juice.  The potential loss for wormy Idareds in NY is $7 M.  Any fresh fruit infested with worms is culled with little to no value.  In response to the high economic risk of minimal fruit infestation, growers and consultants tend to revert to the old system of cover sprays at 10 day intervals. This is a step back for IPM programs in NY but justifiable without adequate information to avoid risk. This project will test the "PETE" model developed by Michigan State University to predict egg hatch and larval development of codling moth and more accurately time insecticide applications to mitigate the risk of infestation. This will be compared to other techniques used for timing control treatments. Saving one spray for every acre of processing apples has the potential of saving $1 M.  Due to this project and other extension efforts, the number of truckloads of fruit rejected in the next few years will decrease or continue to impact on a low percentage of fruit. This project will identify the best model to optimize insecticide use and minimize environmental and economic impact on fruit farms.

Final Report Summary Statement

This project has resulted in a greater industry-wide awareness of the value of seasonal maintenance of pheromone traps to determine the population pressure of CM and OFM on farms.   It has also increased the awareness that the first trap catch can vary by farm by two weeks suggesting “regional” recommendations for spray timing are not adequate.  Growers and consultants are more aware of the importance of egg hatch timings as predicted by degree day models, and the possible need for more applications between the sprays recommended by the model depending on seasonal trap data in high pressure orchards.  Growers learned how to use the new classes of insecticides as they were registered by NYDEC.  And growers and consultants are incorporating mating disruption pheromones in orchards where insecticide programs are not adequate to address the high population of CM.  This project has prevented over $500,000 in farm losses in NY.

Project Impact Data

Producers Participating: 15

Producers Advising: 1

Research/Extension Employed: 0.5

Increase in Gross Farm Revenue: $56,000.00

Gross Farm Savings: $6,750.00

Articles/Publications: 6

Presentations: 7

Total Producers Engaged: 976

Documents and Photos

 Fruit Notes.pdf
Fruit Notes, the Lake Ontario Fruit Region newsletter, sent to 400 industry members. Volume 07, Issue 4. Includes an announcement of NYFVI grant for testing PETE model used in CM managment.
 Fruit Quarterly.doc
Progress in Managing Internal Lep Pests in tre Fruit - Fruit Quarterly, Volume 15, Number 1.
 CMB Peak.doc
Figure illustrating the B peak which is contributing to damage of fruit by CM larvae.
Elizabeth Tee.jpg
Liz is dissecting apple samples to collect and identify the larvae found in the fruit at the processor receiving stations.
 Results of MD for control of CM/OFM using Isomate CM/OFM TT for 2 seasons.doc
Results of 2 years of mating disruption using Isomate CM/OFM TT for control of codling moth and oriental fruit moth.
Results of PETE evaluation and Mating Disruption for 2007.ppt
Powerpoint presentation with a summary of NYFVI project results
 2008 Harvest Eval of Spray Timing Models.doc
Measure of internal lep damage, deep and sting, resulting in different timing models on 4 farms. MS Word Document.
 Isomate CM/OFM TT 3 Year Final Report.pdf
Final report of 3 year project to demonstrate the use of Isomate CM/OFM TT for large plot mating disurption to control internal leps. costs ans spray records included.
Timing Insecticides for Control of OFM/CM.ppt
Presentation made at 2009 Worm Workshop to highlight the lack of spray gap allowed in high pressure CM farms, compared to small gap allowed in moderate pressure, and over treatment recommended in low pressure farms.
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