Timing Insecticides for Control of OFM/CM Deborah Breth CCE-LOF.

Presentation on theme: "Timing Insecticides for Control of OFM/CM Deborah Breth CCE-LOF."— Presentation transcript:

Timing Insecticides for Control of OFM/CM Deborah Breth CCE-LOF

Timing Counts Consider target life stage… –eggs, or hatching larvae? Use Degree-day models to determine when the life stage is present and how long Start the degree-day model with “biofix” – –1 st sustained trap catch

When is the first spray for CM recommended? 1.First moth flight 2.First cover 3.220-250 DD base 50F

Codling Moth Biology Bloom Codling Moth egg laying hatch egg laying hatch 1 st Flight Mid-bloom Overwinter under loose bark and debris 1 st egg hatch at 220-250 DD50F P.McGhee - MSU

Degree-Day calculations 1) Max + Min temp – base temp = daily DD total 2 Start Biofix + Accumulate daily DD = Current DD 2) NEWA – http://www.nysaes.cornell.edu/ipm/specwa re/newa/ enter start date (biofix) and end date, and base temperature, and select weather station location

NEW NEWA calculator for beta testing- 2009 http://newa.nrcc.cornell.edu/ne waModel/apple_pesthttp://newa.nrcc.cornell.edu/ne waModel/apple_pest

New NEWA Apple Insect Models

Codling Moth Timing Model MSU model - PETE Set biofix of first sustained seasonal flight with pheromone traps Calculate accumulated DD50/88F First egg hatch is 220-250 DD 50F 1st spray scheduled for 1 st egg hatch + a 2 nd spray 10-14 days later 2nd generation of egg hatch – 1250 DD + a 2 nd spray 10-14 days later.

NYFVI project Looked at modification of PETE model with focus on seasonal trap data Using a recommended trap threshold of 5 moths per trap per week – If <7 moths per trap per week, extend insecticide residue 200-250 DD after high trap catch through 10-14 day period – 1 spray If >7 moths per trap per week – 2 sprays

CM Spray Timings PETE Modified- PETE Green curves represent egg hatch predictions.

CM Spray Timings PETE Modified- PETE

CM Spray Timings PETE Modified- PETE

CM Model modifications Need to include trap information throughout season –Note B peak that will extend egg hatch of first generation Under moderate populations – MSU PETE is adequate High populations – there is no spray gap Low populations – will overtreat for CM –focus on control of other pests.

OFM Degree day model – base temperature of 45F Mid-Atlantic Orchard Monitoring Guide

Insecticide Timing for OFM Control F6 days after 1st peak flight Fwithin 3 days of the 2nd peak flight or within 6 days of sharp trap count increase for 2nd peak F10 days after 2nd generation spray if high population continues Fwithin 3 days of 3rd peak Fsuggested threshold of 6-8 moths per trap per week

Summary Trapping Counts ! Are orchards high, moderate, or low pressure Set biofix for separate generations Add 200-250 DD base 50F for CM + 10-14 days Add 170-200 DD base 45F for OFM + 10-14 days NEWA and Fruit FAX?

When is the first spray for CM recommended? 1.First moth flight 2.First cover 3.220-250 DD base 50F