New Jersey Snap Bean IPM Guidelines


Joseph Ingerson-Mahar, Vegetable IPM Coordinator
Kristian Holmstrom, Vegetable IPM Program Associate
Sally Walker, Vegetable IPM Program Associate
George Hamilton, IPM Coordinator
Rutgers Cooperative Extension

MAJOR PESTS

 Insects

Diseases

Weeds
 European corn borer  Root rots  Broadleaves
 Mexican bean beetle   Rust  Annual grasses
 Potato leafhopper   Gray mold  Perennial weeds
  Thrips  Brown spot  Common purslane
 Spider mites  Common blight  
  Bean leaf beetle  Halo blight  
Bean aphid Cucumber mosaic virus  
Green cloverworm Yellow mosaic virus  
Corm earworm    
Fall armyworm    
 Cabbage looper    
 Beet armyworm    
 

The following practices are general guidelines that many, if not, most farmers in New Jersey already practice. It is felt that all farmers should be able to adopt these guidelines on 100% of their acreage within a 3-year period. It is recognized that adoption of specific practices may not always be possible depending upon the unique circumstances of the individual farmer. However, farmers should strive to adopt the highly recommended practices in order to be considered an IPM farmer.

A. SITE PREPARATION AND SELECTION

 Priority
H = high
M = medium
L = low

Ø      Review weed maps of fields to choose appropriate weed control strategies

H

Ø      Crop rotation. If a field has had halo blight use a 3 year rotation; for brown spot at least a 1 year rotation is required

H

Ø      Avoid fields with known history of Sclerotinia.

M

Ø      Use east west row orientation when necessary for Sclerotinia. 

L

Ø      Avoid systemic insecticide but use treated seed.

M

Ø      Soil test at least every three years; fertilize and lime according to recommendations.

H

Ø      Take soil sample from field to determine soil texture by mechanical analysis for each soil type within the field.  This needs to be done only once for each field to help determine herbicide rates.

H

Ø      Take soil sample form field to determine percent organic matter to help adjust herbicide rates.  This needs to be done whenever cropping practices change.  That is, going from fallow to crops, from perennial to annual crops.

H
 B. PLANTING  

Ø      Use seed treated with insecticide/fungicide for protection from insects and diseases.

H

Ø      Use western-produced seed certified free of halo blight, common blight, and brown spot.

H

Ø      Use tolerant and disease resistant varieties.

H
 C. PEST MONITORING AND FORECASTING  

Ø      Monitor for insects, diseases, and weeds (potato leafhopper, Mexican bean beetle, spider mites, white and gray mold, brown spot, common blight, and halo blight).

H

Ø      Update weed map of the field when crop is small for use in evaluating the current year's weed control and for use in determining if a post emergent treatment is needed.

H
 D. PEST MANAGEMENT  

Ø      Use applicable thresholds for Mexican bean beetle, potato leafhopper, and European corn borer.

H

Ø      Keep records of pest densities, cultural procedures, and pesticide applications for use in the future.

H

Ø      If more than one option exists for insecticidal control, use an insecticide that is less harmful to natural enemies.

H

Ø      Subscribe to the Plant and Pest Advisory Newsletter- vegetable edition, or access via the internet or fax info-line and follow applicable recommendations provided there.

H

Ø      Follow Rutgers Commercial Vegetable recommendations for pests that do not have thresholds.

H
 E. POST HARVEST  

Ø      Make (or update if one has been made for this field previously) a weed map of the field for use in planning for next year.

H

Ø      Treat perennial weeds with nonselective translocated herbicides.

H

Ø      For fields which had significant levels of brown spot, halo blight, and common blight incorporate crop residue into the soil at the end of the season to promote breakdown of pathogens and tissues that may be carrying them.

H

Ø      Establish cover crop for weed control, nitrogen retention, and reducing soil erosion.

H

Updated 4/5/02