May 18 2020 VOLUME 29 No 9 Geneva NY

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IN THIS ISSUEINSECTS v Management of internal feeding LepidopteraDISEASES v Weekly Apple Scab amp Fire Blight UpdatesGENERAL INFO v LOFP Virtual Pink Meeting Follow-upPEST FOCUSTRAP CATCHES PHENOLOGIES UPCOMING PEST EVENTS

continued

scaffoldsF R U I T J O U R N A L

Update on Pest Managementand Crop Development

For those growers who have used a mating disruption product for CM in

previous years it is likely that you will need some supplemental insecti-cides especially for the first genera-tion (see below for a listing of prod-uct choices) In addition it is very

important that you place pheromone traps in trees to monitor the success of

your mating disruption program We have conducted a number of studies with a newer lure from Treacuteceacute Inc to monitor CM in mating disrup-tion blocks called a CM-DA Combo It contains both the sex pheromone ndash which is released by the females to attract the males ndash and a kairomone (ie a plant-derived chemical volatile [ie pear ester]) that attracts both male and female moths We recommend at least one trap per 5 acres with no less than one trap per 10 acres to determine the success of your mating disruption program There are also powerful 10X lures available for monitor-ing CM male adults in mating disruption blocks

PROGRAM ALREADY IN PROGRESS(Greg Krawczyk [gxk13psuedu] and Lar-

ry Hull Penn State Univ (ret) Biglerville Art Agnello Entomolo-gy Geneva ama4cornelledu)

[Ed Note We are once again reprinting some excerpted advice on management of inter-nal-feeding Lepidoptera contributed a couple of years ago by our Pennsylvania colleagues with a few updates to help in your preparations for managing these pests which are already be-ginning to show up]

vv For growers planning to use mating disruption as part of their annual codling moth (CM) management program you should have already purchased (if not already placed) your products for this year There are a number of products on the market that affect both codling moth and the oriental fruit moth (OFM) simul-taneously in addition to a number of products that affect just a single species Briefly if your target is both CM and OFM there are a number of products that affect both pests ndash CheckMate CMOFM Puffer Isomate CMOFM TT Cide-trak CM-OFM Combo and Isomate CMOFM Mist Plus Among products that target a single species there is Cidetrak CMDA Combo Meso and Cidetrak OFM-L Meso Please follow the label for each product for dispenser density and placement within the tree (ie for CM place the dispensers in the top 20-30 percent of the tree canopy) Even though OFM has already started to fly the above products should be in place be-fore CM biofix

LEPSERVICE

I N S E C T S

scaffolds No 9 May 18 2020

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scaffoldsis published weekly from March to September by Cornell UniversitymdashCornell AgriTech at the NYS Agricultural Ex-periment Station (Geneva) and Ithacamdashwith the assistance of Cornell Cooperative Extension New York field reports welcomed Send submissions by 2 pm Monday to

scaffolds FRUIT JOURNAL Dept of Entomology Cornell AgriTech at NYSAES 15 Castle Creek Dr Geneva NY 14456-1371 Phone 315-787-2341 FAX 315-787-2326 E-mail ama4cornelledu

Editor Art Agnello

This newsletter available online at httpwwwscaffoldsentomologycornelledu

If your plan is to use just conventional insec-ticides for CM control this year your choice of products is quite varied depending on the stage of CM you wish to target Products that possess ovicidal activity (ie affecting the eggs) should be applied as follows Intrepid or Rimon ndash apply within 150ndash175 DD after biofix and follow up 14 days later (note Rimon may only be used once per season in NYS) Insecticides that target the hatching larvae (ie 230ndash250 DD after biofix) are as follows diamides (eg Altacor Exirel Verde-pryn Besiege Voliam Flexi) organophosphate (Imidan) neonicotinoid (eg Assail) Avaunt Delegate and Grandevo Please refer to the Tree Fruit Pest Management Guidelines for rates on these products It is important to implement good resistance management practices for all of the above products that is use only one of the above active ingredients within the same generation of CM do not use the same active ingredients across two consecutive generations)

Another option that growers can consider for internal lep control is a codling moth granulosis vi-rus (CpGV) (eg Cyd-X Virosoft or Madex HP the latter two containing a CpGV that is active on both CM and OFM) These products can be used very successfully in combination with mating dis-ruption to reduce the severity of this pest CpGV products must be ingested by the hatching larvae The larvae will continue to feed for a couple of days before the virus kills them CpGV products are fairly short residual (ie 5ndash7 days) thus they need to be reapplied more often than conventional insecticides Growers will likely need 4ndash5 appli-

cations per generation depending the length of the egg hatch period the severity of the populations and weather conditions

Even if you are just using insecticides or CpGV for CM control this year dont forget to use pheromone traps to monitor adult populations in your orchards Monitoring traps in insecticide-on-ly treated orchards require the use of a 1X lure The traps are very important for setting biofix de-termining the seasonality of adult flight and they can estimate the relative adult population density in the immediate area We dont yet have any hard and fast moth capture thresholds for determining whether to spray or not spray in insecticide-only treated orchards However we have recognized the utility in relying on the provisional ballpark values of 5 CMtrap and 10 OFMtrap vv

Oriental fruit moth [photo G Krawczyk]

Codling moth [illustration H Tashiro]

scaffolds No 9 May 18 2020

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DISEASES

scaffolds No 9 May 18 2020

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Highland Codling Moth 1st catch 515

PEST FOCUS

GENERAL

INFO

LAKE ONTARIO FRUIT PROGRAM VIRTUAL PINK MEETING FOLLOW-UP(Janet van Zoeren LOFP Albion jev67cornelledu)

Thanks to all for registering for the LOF virtual pink meeting which took place last week We now have some follow-up materials avail-able on our website

(httpslofccecornelledusubmissionphpid=707ampcrumb=crops|crops|ap-ples|crop38) There you will find links tomiddot The early April precision pruning video with

Dr Terence Robinsonmiddot The YouTube series of recorded videos of

the Pink Meeting with material presented by Art Agnello Kerik Cox Lailiang Cheng and Terence Robinson

middot The power point slides from the meetingmiddot A pdf with information regarding minimum

temperatures registered across our region this spring (as of May 10th)

We will continue to update this webpage in coming days with bud freezing damage as-sessments from across the region and infor-mation regarding the follow up bloom thin-ning and petal fall meetings

PHENOLOGIES

Geneva Apple (McIntosh Empire Red Delicious) 20 king bloom(Idared) pink Pear (Bosc) bloom Sweet Cherry fruit set Tart Cherry bloom Peach petal fallPlum petal fall to fruit setApricot fruit set

scaffolds No 9 May 18 2020

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Highland Codling Moth 1st catch 515

PEST FOCUS

GENERAL

INFO

LAKE ONTARIO FRUIT PROGRAM VIRTUAL PINK MEETING FOLLOW-UP(Janet van Zoeren LOFP Albion jev67cornelledu)

Thanks to all for registering for the LOF virtual pink meeting which took place last week We now have some follow-up materials avail-able on our website

(httpslofccecornelledusubmissionphpid=707ampcrumb=crops|crops|ap-ples|crop38) There you will find links tomiddot The early April precision pruning video with

Dr Terence Robinsonmiddot The YouTube series of recorded videos of

the Pink Meeting with material presented by Art Agnello Kerik Cox Lailiang Cheng and Terence Robinson

middot The power point slides from the meetingmiddot A pdf with information regarding minimum

temperatures registered across our region this spring (as of May 10th)

We will continue to update this webpage in coming days with bud freezing damage as-sessments from across the region and infor-mation regarding the follow up bloom thin-ning and petal fall meetings

PHENOLOGIES

Geneva Apple (McIntosh Empire Red Delicious) 20 king bloom(Idared) pink Pear (Bosc) bloom Sweet Cherry fruit set Tart Cherry bloom Peach petal fallPlum petal fall to fruit setApricot fruit set

scaffolds No 9 May 18 2020

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NOTE Every effort has been made to provide correct complete and up-to-date pesticide recommendations Nevertheless changes in pesticide regulations occur constantly and human errors are possible These recommendations are not a substitute for pesticide labelling Please read the label before applying any pesticideThis material is based upon work supported by Smith Lever funds from the Cooperative State Research Education and Extension Service US Department of Agriculture Any opinions findings conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the US Department of Agriculture

UPCOMING PEST EVENTS (corrected)

43degF 45degF 50degFCurrent DD accumulations (Geneva 11ndash518) 2910 2279 1180 (Geneva 11ndash5182019) 3307 2655 1439 (Geneva Normal) 4678 3954 2431 (Geneva 11-525 predicted) 3992 3235 1831 (Highland 11ndash518) 5200 ndash 2380 Upcoming Pest Events (Geneva) Ranges (Normal plusmn StDev)American plum borer 1st catch 392-521 196-285Codling moth 1st catch 395-562 199-305Comstock mealybug nymphs in pear buds 215-441 80-254European red mite egg hatch complete 368-470 182-280Green fruitworm flight subsides 258-496 118-269Lesser appleworm 1st catch 276-564 129-305Lesser appleworm 1st flight peak 364-775 183-444Oriental fruit moth 1st flight peak 330-530 278-460 165-281Predator mites observed 211-402 93-210Spotted tentiform leafminer 1st flight peak 265-403 121-211White apple leafhopper nymphs on apple 302-560 146-308McIntosh bloom 344-414 168-217Red Delicious king bloom 316-424 157-204

all DDs Baskerville-Emin BE

INSECT TRAP CATCHES(NumberTrapDay)

Geneva NY Highland NY 511 515 518 54 511 518Green fruitworm 05 00 00 Green fruitworm 00 00 00Redbanded leafroller 25 190 315 Redbanded leafroller 825 895 295Spotted tentiform leafminer 10 50 105 Spotted tentiform leafminer 1880 575 425Oriental fruit moth 00 30 550 Oriental fruit moth 655 195 485 Lesser appleworm 00 05 80 Codling moth 00 00 205

first catch