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Elements of IPM for Winter Squash and Pumpkins in NY State

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Insects Diseases Rotation Weeds

Major Insects

angular leaf spot 1 year annualbroadleaves
striped cucumber beetle bacterial leafspot 1 year annual grasses
spotted cucumber beetle bacterial wilt NA perennial broadleaves
aphids Alternaria 2 years perennial grasses
  anthracnose 2 years  

Minor/Sporadic Insects

Fusarium crown and fruit rot 5 years  
squash bug downy mildew NA  
western corn rootworm gummy stem blight (black rot) 2-3 years  
seed maggot Phytophthora >3 years*  
cutworms powdery mildew NA  
spider mites Septoria leaf spot 2 years  
  Viruses NA  
  damping off NA  
  white mold 3 years  
* - duration of rotation uncertain
NA - not applicable
A. Site Preparation and Selection Acreage Goal Points
1) Review previous season’s weed map/list of fields to choose appropriate weed control strategies. See the Weed Assessment List available for use in satisfying this element. 50% 10
2) Crop rotation: 2-3 years away from cucurbits, more if needed for diseases indicated in table above 75% 10
3) Avoid tomatoes, peppers, and eggplant in rotation with cucurbits 25% 3
4) Nutrient management: soil test at least every third year. Fertilize according to test recommendations. 100% 10
5) Do not apply all nitrogen at planting: sidedress or topdress part of the total N application 75% 10
6) Choose sites with good air drainage; not surrounded by woods 25% 3
7) If manure is applied to field, apply only before planting and incorporate 100% 10
8) Try planting into killed mulch for weed control 1% 3
B. Planting

1) Resistant varieties: Choose disease resistant varieties and varieties less-preferred by beetle pests when available and feasible. 50% 10
2) Use fungicide treated seed. Use seeder box treatment for seedcorn maggot only if conditions dictate 100% 10
3) Turn under any cover crop residue 3 weeks before planting to avoid seedcorn maggot 50% 5
C. Pest Management    
1) Calibrate sprayer at least once per season or every time nozzles are changed 100% 10
2) Scout for insects and diseases as recommended in IPM procedures 25%
3) Follow thresholds for pests for which thresholds have been established 25%
4) Follow management guidelines in Cornell IPM recommendations for pests that do not have thresholds 75% 10
5) Select fungicides based on a resistance management stragegy 50% 10
7) Choose labeled pesticides with the lowest environmental impact 10% 3
8) Keep records of pest populations, pesticide applications, and cultural practices 100% 10
D. Post Harvest    
1) Make late season weed map/list for use the following season. See the Weed Assessment List available for use in satisfying this element. 50% 5
2) Disk down crop residue after harvest 10% 3
3) Establish a cover crop to scavenge nutrients and control weeds, or use spot applications of translocatable herbicide for control of perennial weeds 10% 3

revision date: 2001

Total points available: 158

Points needed to qualify (80%): 126



Specific information on how to apply and use these IPM elements can be found in the following publications:

2000 Cucurbit IPM Scouting Procedures, IPM Bulletin 113

Integrated Crop and Pest Management Guidelines for Commercial Vegetable Production.

A Method to Measure the Environmental Impact of Pesticides. 1992. New York Food and Life Sciences Bulletin Number 139.

The above reference material can be obtained from county Cornell Cooperative Extension offices or Contact the Frank A. Lee Library to view these publications.