Search Results for: corn borer

Sweet Corn 

European corn borer (ECB) moth activity is slowly increasing and spreading northward (see ECB map) .  This is the early part of the second flight.  Very few larval infestations have been detected.  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. As plants progress to pre-tassel and beyond, droppings and  larvae may be found in or on the emerging tassels.  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.    [Read more…]

Sweet Corn 

 European corn borer (ECB) moth activity is now increasing in a few areas of the state (see ECB map) .  Larval infestations have yet to appear.  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. As plants progress to pre-tassel and beyond, droppings and  larvae may be found in or on the emerging tassels.  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.    [Read more…]

Sweet Corn 

 European corn borer (ECB) moth catches are very low, but showing signs of increase on the Cape May/Cumberland Co. border (se ECB map) .  Most larval infestations, have passed.  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. As plants progress to pre-tassel and beyond, droppings and  larvae may be found in or on the emerging tassels.  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.    [Read more…]

Sweet Corn 

European corn borer (ECB) moth catches remain very low now.  Only scattered individuals are now being captured, and growers are managing residual infestations.  At the present, the highest adult activity is in Salem county, although it is quite low even there (see ECB map).  Larval feeding ranges from single digits to above 20% 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%.  [Read more…]