Cornell University InsigniaCornell University New York State Agricultural Experiment Station
 

 
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July 21, 2008 Volume 17 No. 18 Update on Pest Management and Crop Development
 

 

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Upcoming Events

Current DD accumulations

43F

50F

(Geneva 1/1-7/21):

2003

1328

(Geneva 1/1-7/21/2007):

1960

1306

(Geneva "Normal"):

1981

1288

(Geneva 1/1-7/28 Predicted):

2205

1481

(Highland 3/1-7/21):

2148

1447

 

Coming Events: Ranges
(Normal +/- Std Dev):

American plum borer 2nd flight peak

1956-2454

1311-1701

Apple maggot 1st oviposition punctures

1528-2078

1021-1495

Apple maggot flight peak

2118-2570

1021-1495

Codling moth 2nd flight begins

1555-2283

999-1529

Comstock mealybug 1st flight subsides

1818-2132

1216-1418

Lesser appleworm 2nd flight begins

1405-2023

917-1337

Obliquebanded leafroller 1st flight subsides

1621-2121

1040-1426

Oriental fruit moth 2nd flight subsides

2067-2533

1379-1771

Spotted tentiform leafminer 2nd flight subsides

2022-2436

1339-1697

STLM 2nd gen. tissue feeders present

1378-2035

913-1182

Redbanded leafroller 2nd flight peak

1545-2069

983-1389

San Jose scale 2nd flight peak

2102-2513

1422-1764

 

Trap Catches

Geneva

7/10

7/14

7/16

7/21

Redbanded Leafroller

1.5

1.8

0.0

2.9

Spotted Tentiform Leafminer

26.7

36.3

14.0

23.2

Oriental Fruit Moth

2.3

1.4

0.8

0.6

American Plum Borer

0.0

0.3*

0.5

0.2

Lesser Peachtree Borer

0.1

0.0

0.0

0.0

Lesser Appleworm

0.0

0.4*

0.5

0.8

San Jose Scale

0.0

2.8

29.3

85.0

Codling Moth

0.1

0.1

0.0

0.1

Obliquebanded Leafroller

0.0

0.1

0.0

0.0

Peachtree Borer

0.0

0.1

0.0

0.0

Apple Maggot

2.7

3.3

6.0

10.7

 

 

 

 

 

Highland (Peter Jentsch)

6/30

7/7

7/14

7/21

Redbanded Leafroller

0.6

0.3

0.0

0.1

Spotted Tentiform Leafminer

41.4

39.1

Oriental Fruit Moth

0.9

3.2

1.1

0.8

Codling Moth

0.3

0.6

1.9

1.3

Lesser Appleworm

2.2

1.2

2.0

3.6

Obliquebanded Leafroller

0.9

0.4

0.4

0.1

Tufted Apple Budmoth

0.3

0.3

0.0

0.0

Fruittree Leafroller

0.1

0.1

0.0

0.0

Apple Maggot

0.1

0.1

0.3

0.4

Lesser Peachtree Borer

1.1

0.6

0.1

0.1

Dogwood Borer

0.1

0.1

0.1

0.0

* = 1st catch

Insects
FLIGHT PEEK

ORCHARD RADAR DIGEST

Geneva Predictions:
Roundheaded Appletree Borer & Dogwood Borer
Peak RAB egg hatch roughly: July 9 to July 28.
Peak DWB egg hatch roughtly: July 30.

Codling Moth
Codling moth development as of July 21: 2nd generation adult emergence at 9% and 2nd generation egg hatch at 0%.
2nd generation CM 7% egg hatch: July 31 (= target date for first spray where multiple sprays are needed to control 2nd generation CM).

Spotted Tentiform Leafminer
Optimum third sample date for 2nd generation STLM sap-feeding mines: July 26.


 

MODEL BUILDING

Codling Moth (Treatment period for the 2nd generation starts at 1260 DD base 50°F after biofix):

Location  

Biofix

 

DD (as of 7/21)

Albion

 

May 20

 

1142

Appleton-S

 

May 28

 

1063

Clifton Park

 

May 17

 

1125

Clintondale

 

May 11

 

1121

Geneva

 

May 12

 

1152

Knowlesville

 

May 28

 

1060

Red Hook

 

May 14

 

1409

Sodus

 

May 14

 

1035

Waterport

 

May 20

 

1160

Williamson

 

May 12

 

1098

Obliquebanded Leafroller (% estimated egg hatch in DD base 43°F after biofix: 90% hatch – 810 DD; 100% hatch – 950 DD):

Location

 

Biofix

 

DD (as of 7/21)

Albion

 

June 7

 

1266

Appleton-S

 

June 10

 

1134

Clifton Park

 

June 11

 

1041

Geneva

 

June 9

 

1154

Knowlesville

 

June 8

 

1198

Sodus

 

June 10

 

1034

Waterport

 

June 10

 

1158

Williamson

 

June 10

 

1082

[NOTE: Consult our mini expert system for arthropod pest management, the
Apple Pest Degree Day Calculator:
http://www.nysaes.cornell.edu/ipm/specware/newa/appledd.php
Find accumulated degree days between dates with the
Degree Day Calculator:
http://www.nysaes.cornell.edu/ipm/specware/newa/
Powered by the NYS IPM Program’s NEWA weather data and the Baskerville-Emin formula]


RED
TIDE

EIGHT HAIRY LEGS
(Harvey Reissig and Dave Combs, Entomology, Geneva)

       European red mite numbers have been increasing in some of the region's orchards with the recent hot temperatures, so in the interest of keeping informed of current management efforts, the following article details an ERM miticide trial we conducted last year in a research orchard at the Geneva Station.

       Miticide sprays were applied with a Durand-Wayland airblast sprayer at 100 GPA at ERM threshold (16 Jul) to single 'Red Delicious' trees planted at a spacing of 15 x 30 ft.  Treatments were separated by unsprayed buffer trees as well as drive rows.  The treatments were Envidor 240SC (16.0 oz/ acre); Kanemite 15SC (25.0 oz/ acre); Agrimek 0.15 EC (3.5 oz/ acre); Nexter (4.4 oz/ acre) and an Untreated Check.  Treatments including the Untreated Check were replicated three times in single-tree plots and arranged in a RCB design.  ERM and predaceous mites were sampled on 25 randomly selected leaves per tree per replication on 2 Jul, 11 Jul, 16 Jul, 23 Jul, 30 Jul and 6 Aug.  Motile stages of mites and eggs were brushed from the leaves with a mite-brushing machine.

       The summer of 2007 was very conducive to ERM pressure due to extended periods of high temperatures with little rain.  This research orchard was treated with synthetic pyrethroids several times throughout the season in order to facilitate population growth of ERM.  These sprays also eliminated most predaceous mites.  Consequently, predators were not present until these applications ceased, and even then they were at very low numbers or absent from both treated and check plots.  Mite numbers in the plots varied between treatments before miticides were applied.  Therefore, applications were made when the majority of the plots had reached or exceeded threshold levels in July (avg 5 mites/leaf).  ERM populations were significantly lower in all treatments than in the check plots 7d post-treatment on 23 July, and ERM numbers remained below threshold in the Nexter, Envidor and Agrimek plots until 6 Aug (Table 1).  ERM populations were initially very high in the Kanemite plots (20.9/leaff), and although this material significantly reduced ERM numbers during the rest of the season, this material was not as effective as the other treatments.  ERM numbers were low (1.6 mites/leaf) prior to treatment in the Agrimek plots; these remained fairly stable during the rest of the season.

Table 1. Evaluation of miticides for control of European red mite, 2007.

Treatment

 

Date

ERM/leaf

Eggs/leaf

Phytoseiids/leaf

Agri-mek 0.15EC

 

7/2

0.1 a

0.4 a

0.0 a

Nexter

 

7/2

2.3 ab

4.2 ab

0.0 a

Envidor 2SC

 

7/2

8.5 c

20.1 c

0.0 a

Kanemite15SC

 

7/2

4.7 bc

14.3 bc

0.01 a

Untreated Check

 

7/2

3.8 ab

7.8 abc

0.0 a

 

 

 

 

 

 

Treatment

 

Date

ERM/leaf

Eggs/leaf

Phytoseiids/leaf

Agri-mek 0.15EC

 

7/11

0.5 a

5.4 a

0.0 a

Nexter

 

7/11

2.4 a

21.2 ab

0.0 a

Envidor 2SC

 

7/11

17.4 ab

47.9 bc

0.0 a

Kanemite15SC

 

7/11

 

24.1 b

 

48.0 c

 

0.01 a

Untreated Check

 

7/11

5.0 a

31.8 abc

0.0 a

 

 

 

 

 

 

Treatment

 

Date

ERM/leaf

Eggs/leaf

Phytoseiids/leaf

Agri-mek 0.15EC

 

7/16

1.6 a

7.5 a

0.0 a

Nexter

 

7/16

7.8 ab

21.9 ab

0.0 a

Envidor 2SC

 

7/16

8.3 ab

69.4 bc

0.0 a

Kanemite15SC

 

7/16

20.9 b

91.7 c

0.0 a

Untreated Check

 

7/16

6.6 a

61.5 abc

0.0 a

 

 

 

 

 

 

Treatment

 

Date

ERM/leaf

Eggs/leaf

Phytoseiids/leaf

Agri-mek 0.15EC

 

7/23

1.8 a

3.4 a

0.0 a

Nexter

 

7/23

0.6 a

18.6 ab

0.0 a

Envidor 2SC

 

7/23

2.9 a

30.3 b

0.01 a

Kanemite15SC

 

7/23

7.4 a

29.3 b

0.01 a

Untreated Check

 

7/23

29.5 b

55.0 c

0.0 a

 

 

 

 

 

 

Treatment

 

Date

ERM/leaf

Eggs/leaf

Phytoseiids/leaf

Agri-mek 0.15EC

 

7/30

2.1 a

18.6 a

0.01 a

Nexter

 

7/30

0.3 a

8.1 a

0.01 a

Envidor 2SC

 

7/30

0.4 a

14.1 a

0.0 a

Kanemite15SC

 

7/30

12.4 b

31.3 a

0.04 a

Untreated Check

 

7/30

29.9 c

65.6 b

0.05 a

 

 

 

 

 

 

Treatment

 

Date

ERM/leaf

Eggs/leaf

Phytoseiids/leaf

Agri-mek 0.15EC

 

8/6

2.7 ab

36.3 ab

0.01 a

Nexter

 

8/6

0.1 a

10.6 a

0.03 ab

Envidor 2SC

 

8/6

0.1 a

14.4 a

0.01 a

Kanemite15SC

 

8/6

5.0 ab

68.3 b

0.15 c

Untreated Check

 

8/6

10.5 b

130.4 c

0.1 bc

Means within a column followed by the same letter are not significantly different (Fisher's Protected LSD Test, P £ 0.05). Data transformed by arcsine (Sqrt x) prior to analysis.


 

GENERAL INFO
OUR
LABOR
DAY

September Field Tour

   We're about one and a half months away from the annual N.Y. Fruit Pest Control Field Day, which will take place during Labor Day week on Sept. 3 and 4 this year, as dictated by tradition.  These dates fall on the Wednesday and Thursday of the week, with the Geneva installment taking place first (Wednesday Sept. 3), and the Hudson Valley installment on the second day (Thursday Sept. 4).  Activities will commence in Geneva on the 3rd, with registration, coffee, etc., in the lobby of Barton Lab at 8:30 am.  The tour will proceed to the orchards to view plots and preliminary data from field trials involving new fungicides, bactericides, miticides, and insecticides on tree fruits and grapes.  It is anticipated that the tour of field plots will be completed by noon.  On the 4th, participants will register at the Hudson Valley Laboratory starting at 8:30, after which we will view and discuss results from field trials on apples and other fruit crops.  No pre-registration is required for either event.

 

 


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