Search Results for: corn borer

May 17, 2017

Veg IPM Update: Week Ending 5/17/17

Sweet Corn

The arrival of warmer temperatures should improve corn growth considerably.  This same weather could bring on the first consistent European corn borer (ECB) catches, although this has not yet happened.  No ECB were captured in blacklight traps this week.  As the population develops, look for maps to be published in the weekly IPM Update.  There were several corn earworm (CEW) captured in blacklights located in New Egypt, Folsom and Woodstown this past week, however these individuals are of little concern in the absence of silking sweet corn.

Cole Crops

IPM personnel continue to observe infestations of crucifer flea beetle.  These beetles can build to high populations quickly, especially where wild mustard and related cruciferous weeds are common.  Extreme feeding on small transplants can cause irreversible damage if not controlled promptly. [Read more…]

Filed Under: Vegetable Crops Tagged With: ,
May 10, 2017

Veg IPM Update: Week Ending 5/10/17

Sweet Corn

Cold temperatures are slowing corn growth considerably.  The same weather is also delaying the onset of pests like the European corn borer (ECB).  No ECB were captured in blacklight traps this week.  As the population develops, look for maps to be published in the weekly IPM Update.

Cole Crops

Although cold weather and heavy rains have suppressed them, IPM personnel continue to observe infestations of crucifer flea beetle.  These beetles can build to high populations quickly, especially where wild mustard and related cruciferous weeds are common.  Extreme feeding on small transplants can cause irreversible damage if not controlled promptly. [Read more…]

Filed Under: Vegetable Crops Tagged With: ,
May 3, 2017

Veg IPM Update: Week Ending 5/03/17

Sweet Corn

The Vegetable IPM blacklight trap network is nearly complete.  With limited numbers of traps having been checked, only one European corn borer (Allentown, Mercer County) and one corn earworm (Old Bridge, Middlesex County) have been recorded.  As sweet corn is currently in the seedling stage, neither of these catches represent a threat.  As catches become more consistent, maps of the adult populations of these two pests will be published in the weekly IPM Update.

Cole Crops

With warm, sunny days, IPM personnel have discovered a number of heavy infestations of crucifer flea beetle.  These beetles can build to high populations quickly, especially where wild mustard and related cruciferous weeds are common.  Extreme feeding on small transplants can cause irreversible damage if not controlled promptly. [Read more…]

Filed Under: Vegetable Crops Tagged With:
September 28, 2016

Veg IPM Update: Week Ending 9/28/16

Sweet Corn

European corn borer (ECB) moths are nearly non-existent now.  There are no particular areas of higher activity, and  no map will appear in this edition. It is unlikely that we will realize any further injury from this pest this season.

Nearly all remaining sweet corn plantings are now in the silk stage.  Fall armyworm (FAW) however, continues to be a threat to these sweet corn plantings.  We should expect this pest to be with us at some level for the remainder of the sweet corn growing season.   FAW do not respond well to pyrethroid insecticides.  The most useful products are those in the IRAC group 28 class (Coragen, Exirel) or the IRAC group 5 class (Radiant, Entrust), or combination products including these classes.  See the 2016 Commercial Vegetable Recommendations Guide for insecticides effective against FAW.

  [Read more…]

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September 21, 2016

Veg IPM Update: Week Ending 9/21/16

Sweet Corn

European corn borer (ECB) moth numbers have decreased this past week such that only a handful of moths were captured.  There are no particular areas of higher activity, and  no map will appear in this edition. It is unlikely that we will realize any further injury from this pest this season.

The highest nightly ECB catches for the previous week are as follows:

Cinnaminson   1 Milltown   1
Clinton   1 Pedricktown   1
Hillsborough   1 Sergeantsville   1

[Read more…]

Filed Under: Vegetable Crops Tagged With: , , , ,
September 14, 2016

Veg IPM Update: Week Ending 9/14/16

Sweet Corn

16ecb0914aEuropean corn borer (ECB) moth numbers increased slightly this past week.  At the present time, highest activity is in western areas from the Delaware Bay shore northward to Warren County (see ECB map). This partial third flight should not present much of a threat to host crops.  This is particularly true in light of the dominance this year of fall armyworm (FAW). FAW will probably remain the larger threat, and treatments for this pest will eliminate ECB in the process. See the 2016 Commercial Vegetable Recommendations Guide for insecticide choices.

 

 

The highest nightly ECB catches for the previous week are as follows:

Allentown   1 Lawrenceville   1
Crosswicks   1 Pennington   1
Downer   1 Phillipsburg   1
Georgetown   1  Sergeantsville   1

 

There has been little change in the fall armyworm (FAW) situation in the north and central areas.  Joe Ingerson-Mahar indicates that re-infestation rates in younger corn in the southern counties have declined somewhat.  Infestations continue throughout NJ, with damaging infestation rates in all parts of the state.  We should expect this pest to be with us for the remainder of the sweet corn growing season.  Treat when FAW alone or in combination with ECB damage exceeds 12% plants infested.  FAW do not respond well to pyrethroid insecticides.  The most useful products are those in the IRAC group 28 class (Coragen, Exirel) or the IRAC group 5 class (Radiant, Entrust), or combination products including these classes.  See the 2016 Commercial Vegetable Recommendations Guide for insecticides effective against FAW.

  [Read more…]

Filed Under: Vegetable Crops Tagged With: , , , ,