Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker...

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Demonstration and Demonstration and Evaluation of Evaluation of Integrated Crop Integrated Crop Scouting on Pumpkins Scouting on Pumpkins in Southern NJ in Southern NJ Sally Walker Sally Walker Rutgers Cooperative Extension Rutgers Cooperative Extension Vegetable IPM Program Vegetable IPM Program
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Page 1: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Demonstration and Evaluation Demonstration and Evaluation of Integrated Crop Scouting of Integrated Crop Scouting on Pumpkins in Southern NJon Pumpkins in Southern NJ

Demonstration and Evaluation Demonstration and Evaluation of Integrated Crop Scouting of Integrated Crop Scouting on Pumpkins in Southern NJon Pumpkins in Southern NJ

Sally WalkerSally Walker

Rutgers Cooperative ExtensionRutgers Cooperative Extension

Vegetable IPM ProgramVegetable IPM Program

Page 2: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Investigators

Joe Ingerson-Mahar Vegetable IPM Coordinator

Kris Holmstrom IPM Program Associate

Michelle Infante-Casella Gloucester County Ag Agent

Ray Samulis Burlington County Ag Agent

Bill Sciarappa Monmouth County Ag Agent

Steve Johnston Specialist in Vegetable Pathology

Frank Spieker Garden State Pest Management

Page 3: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Objectives

• On-farm demonstration• Evaluate jack-o-lantern pumpkins

(powdery mildew susceptible and resistant varieties)

• Test and compare the North Jersey IPM scouting protocol vs. grower’s usual practices

Page 4: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

5 farms, 6 comparison blocks/fields(Cumberland, 2-Gloucester, Burlington, Monmouth)

Methods

IPM - pest management based on field scouting information

Control - grower follows normal practices

Evaluate yields and field pest levels

Page 5: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Field Layout

ControlIPM

1.5 acres

1.8 acres

2.5 acres

0.4 acres

2.3 acres

0.5 acres

Page 6: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

ControlIPM

4.8 acres

4.5 acres

2.0 acres

2.9 acres

1.8 acres

1.8 acres

Page 7: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Methods• Scout twice a week from emergence

to start of fungicide schedule

• 2 leaves, 5 plants, 10 locations– Insects, mites– Foliar and fruit diseases– Weeds, other problems noted

Page 8: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Scouting Form

Page 9: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Cucumber Beetles

Threshold:>2 per 6 sites

Page 10: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Aphids Spider Mites

Squash Bug

Threshold:>20 leaves w/colony

Threshold:1 nymph group/plant

Threshold: increasing # leaves infested

Page 11: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Powdery Mildew

Threshold:1 lesion/50 mature leaves

Page 12: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Phytophthora

Threshold:Presence of disease

Page 13: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Downy Mildew

Threshold:Presence of disease orDisease forecasted for our region

(Cucurbit Downy Mildew Forecast)

Page 14: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Bacterial Spot

Threshold:Presence of disease

Page 15: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Virus

Watermelon mosaic virus 2Potyvirus

Page 16: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Protocol for IPM fields• Admire at planting or scout for

cuke beetles and treat as needed• Initiate fungicide treatments at

powdery mildew threshold (1 lesion/50 mature leaves) – Bravo+Nova alt. Quadris 7-10 day

schedule

• Modify schedule based on scouting results– Add insecticide if needed– Modify fungicide if needed

Page 17: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.
Page 18: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.
Page 19: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.
Page 20: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.
Page 21: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.
Page 22: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Marketable Yield

23.18

16.52

21.64

8.67

25.42

18.8

17.32

7.13

16.23

0 5 10 15 20 25 30

G1 (Merlin)

G1 (AutumnKing)

C (Howden)

M (Howden)

G2 (Howden)

tons per acre

IPM

Control

Page 23: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Average Fruit Weight

10.4

17.7

14.3

13.1

12.3

17.8

16.6

12.5

0 5 10 15 20

G1 (Merlin)

G1 (Autumn King)

C (Howden)

M (Howden)

G2 (Howden)

pounds

IPM

Control

Page 24: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

ResultsLocation Variety Plot

# Foliar Fungicides

# Foliar Insecticides

Glouc 1 MerlinControl 8 8

IPM 7 6

Glouc 1Autumn King

Control 8 8

IPM 7 6

BurlMagic Lantern

Control 3 2

IPM 3 2

Glouc 2 HowdenControl 6 3

IPM 6 1

Cumb HowdenControl 6 2

IPM 6 2

Monmouth HowdenControl 4 0

IPM 4 0

Page 25: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Fungicide Reduction

Location Variety Fungicide

Reduction

Compared to Standard Rec

(vine run)

Glouc 1 Merlin 1 3

Glouc 1Autumn King

1 3

BurlMagic Lantern

0 1

Glouc 2 Howden 0 2

Cumb Howden 0 2

Monmouth Howden 0 4

Page 26: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Insecticide Reduction

Location Variety Insecticide

Reduction

Compared to Scouting Results

Glouc 1 Merlin 2 6

Glouc 1Autumn King

2 6

BurlMagic Lantern

0 0

Glouc 2 Howden 1 2

Cumb Howden 0 2

Monmouth Howden 0 0

Page 27: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Bottom Line

Pesticide Costs: Potential Savings:

Fungicides: 1-2 applications each:$17 - Bravo OR = $17-$34

$27 - Bravo+Nova = $27-$54

$31 - Quadris = $31-$62

Insecticides/Miticides: 2 applications:$7-10/acre/appl. = $14-$20

Scouting costs:$25 per acre

Page 28: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Conclusions

• Disease scouting worked well for timing and choice of fungicide

• Potential for pesticide reduction and cost savings:– 1-4 fungicide applications– 2+ insecticide applications

• Overall grower response has been positive

Page 29: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.

Plant & Pest AdvisoryVegetable Crops EditionPlant & Pest Advisory

Vegetable Crops Edition Stay informed of insect and

disease advisories

Reduce costs through IPM and more effective use of pesticides

New info each week

Available by mail or fax subscription

Visit the Vegetable IPM Program booth for subscription forms

Page 30: Demonstration and Evaluation of Integrated Crop Scouting on Pumpkins in Southern NJ Sally Walker Rutgers Cooperative Extension Vegetable IPM Program.