Search Results for: corn borer

Sweet Corn

IPM personnel have deployed black light and corn earworm (CEW) pheromone trap networks in central and northern New Jersey counties.  In areas from central Burlington County southward, grower cooperators have been provided with CEW pheromone traps and will be monitoring these traps on their own properties and reporting catch data to IPM personnel.  This is an effort to maintain a statewide reporting program for the most significant economic pest of sweet corn despite a shortage of professional staff this year.  The IPM program thanks these growers in the southern counties for their assistance in maintaining this necessary service.

Black light trap derived maps for European corn borer (ECB), CEW and brown marmorated stink bug (BMSB) will not appear in the Plant and Pest Advisory, as there is no statewide blacklight trap network.  Data from existing black lights in the central and northern counties will appear in table format, with associated information on the relevance of the populations.  Provided that  data from the southern CEW pheromone traps is available on a regular basis, maps will be generated for this pest/trap type.   Limited collections from traps thus far have not contained any target pests.

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Sweet Corn

Fall armyworm (FAW) infestations in whorl stage plantings in northern and central counties have dropped to very low levels.    This may not be the case in southern counties.  Growers are advised to check whorl and seedling stage corn plantings weekly for signs of FAW.  Consider treating if infestation rates exceed 10%.  This pest is capable of significant injury to sweet corn plants, resulting in severe stunting and failure to produce viable ears.  Note that growers of Attribute II type genetically engineered corn are unlikely to see damage from FAW.

Newly hatched FAW larvae cause holes and scratches on leaves that are similar to European corn borer (ECB) feeding, except that they tend to be more concentrated and always lead down into the whorl  (see photos at left).  As the larvae grow, the feeding becomes more destructive, with large ragged holes and obvious droppings deposited in the whorl (see photo at right). 

We will provide updates on new FAW appearances and severity as reports come in.  FAW are resistant to synthetic pyrethroids.  Effective sprays should include IRAC grp. 5 (spinosyns) or IRAC grp. 28 (diamides).  The carbamate (IRAC grp. 1A) Lannate is also still effective.  Sufficient water should be used in the applications to allow the solution to penetrate the layer of droppings that may have formed above the caterpillar.

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Sweet Corn

Fall armyworm (FAW) infestations in whorl stage plantings in northern and central counties have dropped to very low levels.    This may not be the case in southern counties.  Growers are advised to check whorl and seedling stage corn plantings weekly for signs of FAW.  Consider treating if infestation rates exceed 10%.  This pest is capable of significant injury to sweet corn plants, resulting in severe stunting and failure to produce viable ears.  Note that growers of Attribute II type genetically engineered corn are unlikely to see damage from FAW.

Newly hatched FAW larvae cause holes and scratches on leaves that are similar to European corn borer (ECB) feeding, except that they tend to be more concentrated and always lead down into the whorl  (see photos at left).  As the larvae grow, the feeding becomes more destructive, with large ragged holes and obvious droppings deposited in the whorl (see photo at right). 

We will provide updates on new FAW appearances and severity as reports come in.  FAW are resistant to synthetic pyrethroids.  Effective sprays should include IRAC grp. 5 (spinosyns) or IRAC grp. 28 (diamides).  The carbamate (IRAC grp. 1A) Lannate is also still effective.  Sufficient water should be used in the applications to allow the solution to penetrate the layer of droppings that may have formed above the caterpillar.

[Read more…]

Sweet Corn

Fall armyworm (FAW) infestations in whorl stage plantings remain a presence, although in many scouted fields in northern and central counties, the incidence of FAW has declined.  Re-infestation rates are fairly low, even in coastal areas.    This may not be the case in southern counties.  Growers are advised to check whorl and seedling stage corn plantings weekly for signs of FAW.  Consider treating if infestation rates exceed 10%.  This pest is capable of significant injury to sweet corn plants, resulting in severe stunting and failure to produce viable ears.  Note that growers of Attribute II type genetically engineered corn are unlikely to see damage from FAW.

Newly hatched FAW larvae cause holes and scratches on leaves that are similar to European corn borer (ECB) feeding, except that they tend to be more concentrated and always lead down into the whorl  (see photos at left).  As the larvae grow, the feeding becomes more destructive, with large ragged holes and obvious droppings deposited in the whorl (see photo at right). 

We will provide updates on new FAW appearances and severity as reports come in.  FAW are resistant to synthetic pyrethroids.  Effective sprays should include IRAC grp. 5 (spinosyns) or IRAC grp. 28 (diamides).  The carbamate (IRAC grp. 1A) Lannate is also still effective.  Sufficient water should be used in the applications to allow the solution to penetrate the layer of droppings that may have formed above the caterpillar.

[Read more…]

Sweet Corn

Fall armyworm (FAW) infestations in whorl stage plantings remain a presence, although in many scouted fields in northern and central counties, the incidence of FAW has declined.  Treated fields are not typically experiencing re-infestation.    This may not be the case in southern counties.  Growers are advised to check whorl and seedling stage corn plantings weekly for signs of FAW.  Consider treating if infestation rates exceed 10%.  This pest is capable of significant injury to sweet corn plants, resulting in severe stunting and failure to produce viable ears.  Note that growers of Attribute II type genetically engineered corn are unlikely to see damage from FAW.

Newly hatched FAW larvae cause holes and scratches on leaves that are similar to European corn borer (ECB) feeding, except that they tend to be more concentrated and always lead down into the whorl  (see photos at left).  As the larvae grow, the feeding becomes more destructive, with large ragged holes and obvious droppings deposited in the whorl (see photo at right). 

We will provide updates on new FAW appearances and severity as reports come in.  FAW are resistant to synthetic pyrethroids.  Effective sprays should include IRAC grp. 5 (spinosyns) or IRAC grp. 28 (diamides).  The carbamate (IRAC grp. 1A) Lannate is also still effective.  Sufficient water should be used in the applications to allow the solution to penetrate the layer of droppings that may have formed above the caterpillar.

[Read more…]

Sweet Corn

 Fall armyworm (FAW) infestations in whorl stage plantings remain a presence.  In scouted fields, some infestations in whorl corn are in excess of 20%, and are likely much higher in the southern coastal areas.   Growers are advised to check whorl and seedling stage corn plantings weekly for signs of FAW.  Consider treating if infestation rates exceed 10%.  This pest is capable of significant injury to sweet corn plants, resulting in severe stunting and failure to produce viable ears.  Note that growers of Attribute II type genetically engineered corn are unlikely to see damage from FAW.

Newly hatched FAW larvae cause holes and scratches on leaves that are similar to European corn borer (ECB) feeding, except that they tend to be more concentrated and always lead down into the whorl  (see photos at left).  As the larvae grow, the feeding becomes more destructive, with large ragged holes and obvious droppings deposited in the whorl (see photo at right). 

We will provide updates on new FAW appearances and severity as reports come in.  FAW are resistant to synthetic pyrethroids.  Effective sprays should include IRAC grp. 5 (spinosyns) or IRAC grp. 28 (diamides).  The carbamate (IRAC grp. 1A) Lannate is also still effective.  Sufficient water should be used in the applications to allow the solution to penetrate the layer of droppings that may have formed above the caterpillar.

[Read more…]