Elements of IPM for
Brussels Sprouts in NY State

diamondback moth

Alternaria leaf spot

broadleaves

imported cabbageworm

black rot

annual grasses

cabbage looper

blackleg

onion thrips

clubroot

cabbage maggot

downy mildew

cabbage aphids

Fusarium yellows

flea beetles

Sclerotinia white mold

root rot

sugar beet cyst nematode

Acreage Goal

Points

1) Rotate and isolate seedbeds from production areas to reduce incidence and spread of Alternaria leaf spot, black rot, blackleg, downy mildew, root rot, and club root diseases.

100%

10

2) Scout for black rot and destroy any black rot infected beds.

100%

10

3) Strive for weed-free beds.

75%

5

4) Use uninfected, hot-water treated seed to reduce Alternaria leaf spot, black rot, blackleg OR use seed tests to determine if seed is infected.

50%

5

5) Use varieties that are resistant or tolerant to onion thrips, black rot, and/or Fusarium yellows as appropriate.

75%

10

1) Adjust pH to between 7.2 and 7.5 in fields with a history of clubroot.

75%

5

2) Avoid fields with history of Fusarium yellows or use yellows resistant varieties.

100%

10

3) Review weed map/list of fields to choose appropriate weed control strategies. See the Weed Assessment List available for use in satisfying this element.

50%

5

4) Do not plant thrips sensitive varieties adjacent to small grains or hay fields that can be a source of thrips.

100%

5

1) Plant Brussels sprouts where crucifers were not grown for at least 3 years to reduce Alternaria leaf spot, black rot, downy mildew, root rot, Sclerotinia white mold, sugar beet cyst nematode; 4 years for blackleg; 7 years for clubroot, Fusarium yellows.

100%

10

1) Soil test at least once every 3 years. Maintain records.

100%

5

2) Fertilize according to test results.

1) Use insecticide application for cabbage maggot control only when fields are at risk from peak adult flights.

50%

5

2) Transplants, particularly those from out-of-state, should be inspected and used only if they are free of diamondback moth, black rot, black leg, club root, and Alternaria.

50%

5

1) Scout weekly for insects and diseases: cabbage looper, diamondback moth, imported cabbageworm, onion thrips, cabbage aphids, cabbage maggot, black rot, clubroot, downy mildew, Alternaria leaf spot, Fusarium yellows, root rot, sugar beet cyst nematode, and Sclerotinia white mold. Scout 2 to 3 times per week for flea beetles when plants are in cotyledon stage (direct seeded).

100%

10

2) Update weed map/list of the field when crop is no taller than 6 inches for use in evaluating the current year's weed control and for use in determining if a post emergent treatment is needed. See the Weed Assessment List available for use in satisfying this element.

50%

5

3) If black rot occurs in field do not cultivate or spray until foliage is dry and clean equipment after use in infected fields.

100%

10

1) Follow available thresholds established for pests.

50%

10

2) Choose labeled pesticides that have the least environmental impact. Choose pesticides that preserve natural enemies.

35%

10

3) Unless black rot infections are apparent very early in the season, Do NOT use copper sprays to control black rot since they are not effective.

100%

5

4) Keep records of pest densities, biological control techniques used, cultural procedures, and pesticide applications. Keep records of pest populations for each field for review in future years. Keep records of natural enemy populations, if possible.

100%

10

1) For early and midseason fields disk/plow Brussels sprouts residues to promote breakdown of tissues infected with black rot, Alternaria leaf spot, blackleg, clubroot, downy mildew, root rot, and Sclerotinia white mold.

75%

3

2) Make (or update if one has been made for this field previously) a weed map/list of the field for use in planning for next year. See the Weed Assessment List available for use in satisfying this element.

50%

5

3) Establish cover crop for weed control nitrogen retention for early and mid season fields.

10%

5