Evaluate jack-o-lantern pumpkins (powdery mildew susceptibl

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

• Sally Walker
• Rutgers Cooperative Extension
• Vegetable IPM Program

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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
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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. growers usual practices

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

• IPM - pest management based on field scouting
  information

• Control - grower follows normal practices

Evaluate yields and field pest levels
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Field Layout
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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

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Scouting Form
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Cucumber Beetles
Threshold gt2 per 6 sites
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Aphids
Threshold gt20 leaves w/colony
Threshold increasing leaves infested
Threshold 1 nymph group/plant
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Powdery Mildew
Threshold 1 lesion/50 mature leaves
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Phytophthora
Threshold Presence of disease
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Downy Mildew
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Bacterial Spot
Threshold Presence of disease
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Virus
Watermelon mosaic virus 2 Potyvirus
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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)
• BravoNova alt. Quadris 7-10 day schedule
• Modify schedule based on scouting results
• Add insecticide if needed
• Modify fungicide if needed

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Marketable Yield
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Average Fruit Weight
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Results
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Fungicide Reduction
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Insecticide Reduction
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Bottom Line
Scouting costs 25 per acre

• Pesticide Costs Potential Savings
• Fungicides 1-2 applications each
• 17 - Bravo OR 17-34
• 27 - BravoNova 27-54
• 31 - Quadris 31-62
• Insecticides/Miticides 2 applications
• 7-10/acre/appl. 14-20

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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

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Plant Pest AdvisoryVegetable 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
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