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May 10, 1999 Volume 8 No. 8

Coming Events & Current Situation
Scaffolds Logo

Scaffolds is published weekly from March to September by Cornell University -- NYS Agricultural Experiment Station (Geneva), and Ithaca -- with the assistance of Cornell Cooperative Extension.

New York field reports welcomed. Send submissions by 3 p.m. Monday to:

Scaffolds Fruit Journal

Editors: A. Agnello, D. Kain

Dept. of Entomology, NYSAES

Geneva, NY 14456-0462

Phone: 315-787-2341 FAX: 315-787-2326

Scaffolds 99 index

COMING EVENTS

 

43F

50F

Current DD accumulations (Geneva 1/1-5/10):

377

185

(Geneva 1998 1/1-5/10):

508

275

(Geneva "Normal" 1/1-5/10):

337

157

(Hudson 3/17-5/10):

410

193

 

Coming Events:

Ranges:

 

Codling moth 1st catch

273-805

141-491

Oriental fruit moth 1st flight peak

259-606

96-298

Pear psylla 1st hatch

111-402

55-208

Plum curculio adults active

135-394

49-225

Redbanded leafroller 1st flight peak

180-455

65-221

Rose leafhopper nymphs on multiflora rose

188-402

68-208

Rosy apple aphid nymphs present

91-291

45-148

San Jose scale 1st catch

189-704

69-385

Spotted tentiform leafminer 1st oviposition

141-319

48-154

Spotted tentiform leafminer 1st flight peak

180-544

65-275

Spotted tentiform leafminer sap-feeders present

295-628

130-325

Tarnished plant bug adults active

71-536

34-299

McIntosh at petal fall

418-563

210-317

Peach at shuck split

362-518

174-287

Pear at petal fall

343-544

144-275

Plum at petal fall

277-466

113-252

Sweet cherry at fruit set

381-518

171-287

Tart cherry at petal fall

385-563

185-289

 

Phenologies (Geneva):

Apple (McIntosh):

Full Bloom

 

(Delicious):

King Bloom

 

Pear (Bartlett) :

25% Petal Fall

 

Sweet Cherry (Windsor):

Petal Fall

 

Tart Cherry (Montmorency):

25% Petal Fall

 

Peach:

Petal Fall

(Highland):

Apple (McIntosh):

30% Petal Fall

 

Pear (Bartlett):

Petal Fall

 

Apricot:

Fruit 1 cm diameter

 

Plum (Stanley):

Shuck Split

TRAP CATCHES (Number/trap/day)

Geneva:

4/26

4/29

5/3

5/6

5/10

Green Fruitworm

0.0

0.0

0.0

0.0

0.0

Spotted Tentiform Leafminer

1.8

333

349

499

663

Redbanded Leafroller

1.3

2.2

11.5

18.6

5.6

Oriental Fruit Moth

0.3

0.5

72

101

51

Lesser Appleworm

0.0

0.0

14.6*

12.8

18.1

San Jose Scale

-

-

0.0

0.0

0.0

Codling Moth

-

-

-

0.0

0.0

American Plum Borer

-

-

-

-

0.4*

Lesser Peachtree Borer

-

-

-

-

0.0

Highland (Dick Straub, Peter Jentsch):

4/12

4/19

4/26

5/3

5/10

Green Fruitworm

0.5

0.0

0.0

0.0

0.0

Spotted Tentiform Leafminer

2.4

9.1

13.2

19.9

16.3

Redbanded Leafroller

10.7

20.8

20.2

18.4

14.9

Oriental Fruit Moth

-

-

0.2*

3.4

5.6

Codling Moth

-

-

0.0

0.1*

0.1

Lesser Appleworm

-

-

-

0.1*

0.2

European Red Mite (#/leaf)

-

-

0.2*

10.0

18.0

San Jose Scale

-

-

-

-

0.0

White Apple Leafhopper Nymphs

-

-

-

-

0.0

* = 1st catch

PEST FOCUS

Geneva: European Red Mite nymphs noted 5/5.

American Plum Borer 1st catch 5/10.

Hudson: Spotted Tentiform Leafminer and Oriental Fruit Moth numbers

high.

American Plum Borer 1st catch in peach and cherry.

APPLE SCAB UPDATE

(Dave Rosenberger, dar22@cornell.edu Plant Pathology, Highland)

The first primary scab lesions appeared on Friday, May 7, on unsprayed trees at the Hudson Valley Lab. These lesions resulted from the infection period of April 22-23. Additional scab infection periods occurred May 3-4 (12 hr, 53°F, 0.1 inch rain) and May 8-9 (33 hr, 59°F, 0.25 inch rain). Spotty showers occurred throughout the Hudson Valley last week. Some areas received more than an inch of rain, but drought conditions still prevail in much of the lower Hudson Valley. At the Hudson Valley Lab, total accumulated rainfall since April 1 is only 1.4 inches, and soil water reserves were relatively low at the beginning of April. The supply of apple scab ascospores is usually depleted by about petal fall, but some later discharges are likely this year because drought conditions have delayed both spore discharge and disintegration of the overwintering leaves on the orchard floor.

Past Coming Events: 4/5 | 4/12 | 4/19 | 4/26 | 5/3

5/10 Diseases