June 10, 2019 VOLUME 28, No. 12 Geneva, NY

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IN THIS ISSUE...INSECTS v Internal worm management v Spotted Wing Drosophila update

DISEASES v Weekly apple scab update

CHEM NEWS v Virosoft CP4 label for CM+OFM

UPCOMING PEST EVENTSMODEL BUILDINGINSECT TRAP CATCHES

continued...

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

Update on Pest Managementand Crop Development

would be recommended starting at 220 DD50 from biofix; we're already

beyond this point in Highland and Geneva, but sites in WNY range from 81-247 DD50, depending on proximity to the lake (refer to "Model Building" numbers in this

issue). Products with insect growth regulator activity, such as Rimon, In-

trepid or Esteem, would also be suitable options this week in apple sites at the lower end of these values. Other products with activity against internal leps include the neonic Assail, the biological Grandevo (also organically ap-proved) and, in orchards where resistance has not developed to the newer pyrethroids, also Baythroid, Danitol, Endigo, and Leverage. Most older broad-spectrum materials like Imi-dan, Lannate, and the older pyrethroids, which were formerly more effective, are generally not as good choices because of insecticide resis-tance issues.

STEPSAGAINST LEPS(Art

Agnello Entomology, Geneva;ama4@cornell.edu)

vv We're entering the prime window for control of our most serious fruit-feeding lep-idopteran pests – oriental fruit moth, codling moth, and obliquebanded leafroller. Orien-tal fruit moth adults are finishing up the first flight of the season, and the first flush of OFM larvae, which aren't a major threat to newly set apples and would have been best handled during the petal fall period, are mostly on their way to pupating. In contrast, codling moth adults have been flying for 1-2 weeks around the state, and the eggs they have laid will soon be in the early stages of hatching, which makes this week a very opportune time to prepare for the first control sprays against the early-instar larvae. Fortunately, we have a good selection of effective materials to use against them.

The best products for controlling both CM and OFM in apples and stone fruits are those in IRAC Group 28 (containing a di-amide; i.e., Altacor, Exirel, Minecto Pro, Voliam Flexi or Besiege) or IRAC Group 5 (mainly spinetoram, Delegate; spinosad, formulated as Entrust, is an organically ap-proved option). Two applications from ei-ther of these groups on a 10–14-day interval

TORTRICIDTRIO

I N S E C T S

[Ed. Note: Next week's issue will come out on Tuesday, June 18, as I will be traveling on Monday - AMA]

scaffolds No. 12 June 10, 2019

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scaffoldsis published weekly from March to September by Cornell University—Cornell AgriTech at the NYS Agricultural Ex-periment Station (Geneva) and Ithaca—with 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: ama4@cornell.edu

Editor: Art Agnello

This newsletter available online at: http://www.scaffolds.entomology.cornell.edu/

Female SWD

Now would also be an appropriate time for an application of a granulosis virus prod-uct in pome and stone fruits such as Cyd-X, Madex, Virosoft CP4 or Carpovirusine (ap-ples and pears only), in additon to the larvi-cides discussed above. These are biological insecticides, which must be ingested to initiate the infection, after which the virus replicates inside the larva until it is killed; this releases more virus particles into the orchard. This is a very useful approach for long-term population reduction, particularly when used in at least 2 applications per generation. Madex, and now Virosoft CP4 (see "Chem News" in this issue) contain an isolate that is also effective against OFM.

OBLR larval emergence is still on the order of 14 days away in Geneva, but should be start-ing in less than a week in the Hudson Valley. Anytime from first hatch until about 25% hatch (360-450 DD43 after biofix) would be an ap-propriate time for a larvicidal material, and the IRAC Group 5 and 28 products recommended against CM and OFM will also be very effec-tive against OBLR. Others with slightly less efficacy, but useful in lower pressure situations, include B.t. products (Agree, Biobit, Deliver, Dipel, Javelin, etc.), Proclaim, Grandevo, Ven-erate (stone fruits only) and possibly Intrepid. In orchards where OBLR pressure is unpre-dictable, we recommend waiting until approx-imately 600 DD43 and sampling for infested terminals using a 3% threshold (see p. 73 in the Recommends).

More details on the nuts and bolts theory and practice of CM and OFM management can be found in the fact sheet by Breth, Agnello and Tee at: http://www.fruit.cornell.edu/lof/ipm/pdfs/codling_moth.pdf

SWD TRAPPING UPDATE(Julie Carroll, NYS IPM Program, Geneva; jec3@cornell.edu)

This past week saw the first catch of spotted wing drosophila adults in Putnam, Wayne and Ulser Counties (June 6) as well as Orange Co. (June 8). Details can be accessed at the Spot-ted Wing Drosophila blog site [http://blogs.cornell.edu/swd1/2019/05/30/swd-yes-in-tart-cherry-orchards-not-in-berry-plantings/]

scaffolds No. 12 June 10, 2019

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MODEL BUILDINGInsect model predictions for Highland / Gene-va and other sites[Source: NEWA Apple Insect Models, http://newa.cornell.edu/index.php?page=apple-in-sects]

Plum Curculio spray window from McIntosh PF to 308 DD50; currently at 323 [Highland] / 218 [Geneva] / 116 [Williamson] / 121 [So-dus] / 117 [Albion] / 116 [Lyndonville]Codling Moth spray window for ovicides at 150 DD50 and for larvicides at 250-360 DD50 after biofix; currently at 343 [Highland] / 240 [Geneva] / 116 [Williamson] / 135 [Wolcott] / 121 [Sodus]) / 243 [Albion] / 247 [Medina] / 81 [Waterport]

San Jose Scale crawler emergence @ 310 DD50 after biofix; currently at 306 [Highland] / 85 [Geneva]

Obliquebanded Leafroller spray window at 360 DD43 after biofix; currently at 157 [High-land]

VIROSOFT CP4 LABEL NOW INCLUDES CM AND OFM

The most recent label for Virosoft CP4 (BioTEPP, EPA Reg. No. 72898-4), which is a biopesticide that contains a granulovirus tar-geted against codling moth, now also includes oriental fruit moth on the list of insects for which it can be used. As with the other granu-loviruses available agains CM and OFM, this product is OMRI registered, and does not af-fect bees or other beneficial insects.

CHEM

NEWS

DISEASES

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scaffolds No. 12 June 10, 2019

INSECT TRAP CATCHES(Number/Trap/Day)

Geneva, NY Highland, NY 6/3 6/7 6/10 5/28 6/3 6/10Redbanded leafroller 8.5 1.5 0.0 Redbanded leafroller 10.0 0.0 0.0Spotted tentiform leafminer 4.5 1.0 1.0 Spotted tentiform leafminer 45.0 2.0 18.5Oriental fruit moth 57.5 29.5 30.0 Oriental fruit moth 26.0 13.0 7.5Codling moth 50.0 32.0 39.5 Lesser appleworm 12.0 2.0 9.5Lesser peachtree borer 16.0 11.5 6.5 Codling moth 22.0 46.0 13.7San Jose scale 395.0* 32.0 20.0 Tufted apple budmoth 0.9* 11.5 29.0 Dogwood borer 0.1* 0.0 11.0 San Jose scale 61.2* 16.5 10.0 Obliquebanded leafroller 0.0 0.5* 14.5 *firstcatch

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UPCOMING PEST EVENTS

43°F 50°FCurrent DD* accumulations (Geneva 1/1–6/10): 738.3 397.5 (Geneva 1/1–6/10/2018): 910.5 561.2 (Geneva "Normal"): 883.0 527.5** Geneva 1/1-6/17, predicted): 853.3 469.5 (Highland 1/1–6/10): 1057.8 609.3

**(Note: An incorrect value was printed for last week's Geneva "Normal" DD50 accumulation; it should have been '433.8'. Like they say, we regret the error...) Coming Events: Ranges (Normal ±StDev):American plum borer 1st flight peak 601-967 329-585Black cherry fruit fly 1st catch 702-934 380-576Black stem borer 1st flight subsides 832-1214 467-759Cherry fruit fly 1st catch 755-1289 424-806Codling moth 1st flight peak 566-986 312-584Dogwood borer 1st catch 751-1215 432-738European red mite summer egg hatch 737-923 424-574Obliquebanded leafroller 1st catch 796-978 463-589Oriental fruit moth 1st flight subsides 826-1098 484-678Pandemis leafroller 1st catch 755-892 437-518Pear psylla 1st summer generation adults 737-885 428-526Peachtree borer 1st catch 781-1313 448-812Redbanded leafroller 1st flight subsides 609-893 341-555Spotted tentiform leafminer 1st flight subsides 680-944 378-572White apple LH 1st brood adults 1st catch 679-1041 380-694

*all DDs Baskerville-Emin, B.E.

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 pesticide.This material is based upon work supported by Smith Lever funds from the Cooperative State Research, Education, and Extension Service,U.S.DepartmentofAgriculture.Anyopinions,findings,conclusions,orrecommendationsexpressedinthispublicationarethoseoftheauthor(s)anddonotnecessarilyreflecttheviewoftheU.S.DepartmentofAgriculture.