Search Results for: corn borer

July 15, 2015

Veg IPM Update: Week Ending 7/15/15

Sweet Corn

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There is still very little European corn borer (ECB) adult activity at this time. Few individuals have been captured throughout NJ this past week (see ECB map). ECB infestations are absent from sweet corn plantings. We would expect to see signs of the second flight within the next week or so.

As always, consider treating when the number of infested plants in a 50 plant sample exceeds 12%. Any planting remaining at or above threshold as it proceeds to full tassel should be treated, as this is the last stage at which ECB larvae will be exposed and vulnerable to insecticidal sprays.

See the 2015 Commercial Vegetable Recommendations Guide for insecticide choices.
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Filed Under: Vegetable Crops
July 9, 2015

Veg IPM Update: Week Ending 7/8/15

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Sweet Corn

We are still between European corn borer (ECB) adult generations at this time. Very few individuals have been captured throughout NJ this past week (see ECB map). ECB infestations are almost gone from all sweet corn plantings. We would expect to see signs of the second flight within the next two weeks.

As always, consider treating when the number of infested plants in a 50 plant sample exceeds 12%. Any planting remaining at or above threshold as it proceeds to full tassel should be treated, as this is the last stage at which ECB larvae will be exposed and vulnerable to insecticidal sprays.

See the 2015 Commercial Vegetable Recommendations Guide for insecticide choices.
[Read more…]

Filed Under: Vegetable Crops
July 1, 2015

Veg IPM Update: Week Ending 7/1/15

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Sweet Corn

We are between European corn borer (ECB) adult generations at this time. Only scattered individuals are being captured throughout NJ (see ECB map). ECB infestations are still present in some sweet corn plantings, but whorl stage corn is now largely free of ECB injury.

As always, consider treating when the number of infested plants in a 50 plant sample exceeds 12%. Any planting remaining at or above threshold as it proceeds to full tassel should be treated, as this is the last stage at which ECB larvae will be exposed and vulnerable to insecticidal sprays.

See the 2015 Commercial Vegetable Recommendations Guide for insecticide choices.
[Read more…]

Filed Under: Vegetable Crops
June 24, 2015

Veg IPM Update: Week Ending 6/24/15

Sweet Corn

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European corn borer (ECB) adult activity is now very low. Only scattered individuals remain in northern NJ, while the activity in the southwestern part of the state has declined to nearly nothing. The first flight is over in most of NJ. Areas of highest activity is in parts of Morris County (see ECB map). ECB infestations are still present in sweet corn plantings. Feeding in pretassle stage plantings in the 30% range has been found in areas where IPM personnel are operating.

Be sure to begin monitoring plantings for ECB feeding while they are still in the whorl stage. Consider treating when the number of infested plants in a 50 plant sample exceeds 12%. Feeding in the whorl stage will appear as numerous small holes (called “shot-hole”) on leaves, with damage present on consecutively younger leaves.
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Filed Under: Organic Production, Vegetable Crops
June 17, 2015

Veg IPM Update: Week Ending 6/17/15

Sweet Corn

ECB 6-17-15

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Warmer evening temperatures have resulted in a slight resurgence of European corn borer (ECB) adults in the blacklight network. A residual first generation population remains in northern NJ, while the activity in the southwestern part of the state may represent the beginning of a second flight. The nature of the southern NJ activity should become clear over the next 1-2 weeks. Areas of highest activity include parts of Morris and Gloucester counties (see ECB map). ECB infestations continue to rise in sweet corn plantings. Feeding ranges from single digits to over 50% in areas where IPM personnel are operating.
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Filed Under: Organic Production, Vegetable Crops
June 10, 2015

Veg IPM Update: Week Ending 6/10/15

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Sweet Corn

Catches of European corn borer (ECB) are now in decline through much of the state. Remaining areas of highest activity include parts of Morris and Warren counties (see ECB map).

ECB infestations are now rising in sweet corn plantings. Feeding ranges from single digits to 12% in areas where IPM personnel are operating.

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Filed Under: Organic Production, Vegetable Crops