Corn: European Corn Borer (ECB) (Ostrinia nubilalis)


Pub 812: Field Crop Protection Guide > Chapter 1: Corn > European Corn Borer (ECB)

Field Crop Protection Guide 2011-2012, Order 2011-2012 publication

Table of Contents

  1. Description
  2. Integrated Pest Management Options
  • Bt corn - Agrisure 3000GT, Agrisure CB, Agrisure Viptera 3110, Agrisure Viptera 3111, Genuity SmartStax, Genuity VT Double Pro, Genuity VT Triple Pro, Herculex l, Herculex XTRA, SmartStax, YieldGard CB, YieldGard Plus, YieldGard VT Triple
    • Foliar Treatment
      • chlorantraniliprole - Coragen
      • deltamethrin - Decis 5 EC
      • cypermethrin - Ripcord 400 EC
      • cyhalothrin-lambda - Matador 120 E, Silencer 120 EC
      • Bacillus thuringiensis - Bioprotec CAF, Dipel 2X DF
      • carbaryl - Sevin XLR Plus
  1. Related links...

Description

Egg masses are flat, creamy white and layered over each other, making the egg mass appear similar to fish scales. Mature larvae are creamy white to pale grey with 2 small spots per abdominal segment, approximately 2.5 cm in length and have a black head. Adults are light-brown moths approximately 2 cm long with dark wavy lines running across each forewing. Male moths are darker and smaller than females.

Image 1. European corn borer eggmass. Each eggmass can have 15-40 eggs, which are layered like fish scales.
Image 1. European corn borer eggmass. Each eggmass can have 15-40 eggs, which are layered like fish scales.

Image 2. European corn borer larvae are cream to pink with black heads and two black spots per abdominal segment. Stalk rots can be carried in by the larvae.
Image 2. European corn borer larvae are cream to pink with black heads and two black spots per abdominal segment. Stalk rots can be carried in by the larvae.

Image 3. Adult European corn borer moths. Female (left) is larger and lighter in colour than the male (right).
Image 3. Adult European corn borer moths. Female (left) is larger and lighter in colour than the male (right).


Integrated Pest Management Options

To manage potential corn borer resistance, plant the appropriate refuge for the Bt corn trait used and follow all insect resistance management strategies mandated by the Canadian Food Inspection Agency. For more information regarding Bt corn and/or refuge options, see the Canadian Corn Pest Coalition website, found at www.cornpest.ca.

 
Active ingredient Bt corn
Trade name Agrisure 3000GT, Agrisure CB, Agrisure Viptera 3110, Agrisure Viptera 3111, Genuity SmartStax, Genuity VT Double Pro, Genuity VT Triple Pro, Herculex l, Herculex XTRA, SmartStax, YieldGard CB, YieldGard Plus, YieldGard VT Triple
Rate per hectare (product) See Table 9-4, Transgenic Crops Expressing Insecticidal or Fungicidal Traits, on page 119, for Bt corn options.
Comments Insecticides have generally not provided economic control of ECB in field corn. Bt corn provides much better control. Use corn hybrids that express the Bt toxin in the ear as well as the stalk to help avoid stalk and ear rot. Keep careful and accurate records as to where Bt and non-Bt hybrids are planted.

 


Foliar Treatment

See OMAFRA Publication 811, Agronomy Guide for Field Crops, to calculate economic thresholds.

 
Active ingredient chlorantraniliprole
Trade name Coragen
Rate per hectare (product) 250-375 mL per ha
Rate per acre (product) 101-151 mL per ac
PHI* 14 (field corn) 1 (seed corn)
Comments Apply to foliage when rain is not expected in the next 24 hr. Time application to coincide with peak egg hatch. Use a minimum of 100 L/ha of water. Maximum 4 applications/yr. 12-hr re-entry period.

 

 
Active ingredient deltamethrin
Trade name Decis 5 EC
Rate per hectare (product) 250-300 mL per ha
Rate per acre (product) 100-120 mL per ac
PHI* 1
Comments Ground application only. Apply when egg masses begin to hatch but no later than when 1st pinhole feeding occurs on foliage. For 2nd brood in late planting, apply before tassels show. Repeat 5-8 day intervals. Use at least 240 L water/ha. Maximum 3 applications/yr. Do not feed silage or stubble to dairy cattle. 12-hr re-entry period.

 

 
Active ingredient cypermethrin
Trade name Ripcord 400 EC
Rate per hectare (product) 175 mL per ha
Rate per acre (product) 70 mL per ac
PHI* 5
Comments Apply when egg masses begin to hatc but not later than when 1st feeding occurs on foliage. For 2nd brood in late planting, apply before tassels show. Use a minimum of 300-500 L water/ha for ground application and 11-22 L/ha for aerial application. Maximum 3 applications/yr. Do not apply more than 2 applications by air. Re-entry period when foliage dries.

 

 
Active ingredient cyhalothrin-lambda
Trade name Matador 120 E
Rate per hectare (product) 187 mL per ha
Rate per acre (product) 76 mL per ac
PHI* 14 (silage) 21 (field & seed)
Comments Ground and aerial application. For best results, apply in the early morning, before temperatures rise, or during the evening, past the heat of the day. Use 100-200 L water/ha for ground application, 10-40 L water/ha for aerial application. Spray no later than 10 days after egg hatch. Maximum 3 applications/yr. Do not apply more than 2 applications of 83 mL/ha by air. 24-hr re-entry period.

 

 
Active ingredient cyhalothrin-lambda
Trade name Silencer 120 EC
Rate per hectare (product) 83-187 mL per ha
Rate per acre (product) 34-76 mL per ac
PHI* 14 (silage) 21 (field & seed)
Comments Ground and aerial application. For best results, apply in the early morning, before temperatures rise, or during the evening, past the heat of the day. Use 100-200 L water/ha for ground application, 10-40 L water/ha for aerial application. Spray no later than 10 days after egg hatch. Maximum 3 applications/yr. Do not apply more than 2 applications of 83 mL/ha by air. 24-hr re-entry period.

 

 
Active ingredient Bacillus thuringiensis
Trade name Bioprotec CAF
Rate per hectare (product) 2.8-4.0 L per ha
Rate per acre (product) 1.1-1.6 L per ac
PHI* 1
Comments Ground application only. This product is a good option for organically grown corn. Apply at first signs of infestation when larvae are small. Repeat applications, according to economic threshold, as necessary to maintain control. Use a minimum of 300 L/ha water. This product is more effective when no rain occurs within 24-48 hr after application. Maximum 6 applications/yr.

 

 
Active ingredient Bacillus thuringiensis
Trade name Dipel 2X DF
Rate per hectare (product) 0.56-1.12 kg per ha
Rate per acre (product) 0.22-0.45 kg per ac
PHI* 1
Comments Ground application only. This product is a good option for organically grown corn. Apply at first signs of infestation when larvae are small. Repeat applications, according to economic threshold, as necessary to maintain control. Use a minimum of 300 L/ha water. This product is more effective when no rain occurs within 24-48 hr after application. Maximum 6 applications/yr.

 

 
Active ingredient carbaryl
Trade name Sevin XLR Plus
Rate per hectare (product) 2.5-4.0 L per ha
Rate per acre (product) 1.0-1.6 L per ac
PHI* 1
Comments For larvae in whorls and foliage, treat entire plant. Repeat as necessary. For silks and ears, apply in 2-4 day intervals when silks first appear. Follow label precautions applying to honeybees.

 


Related links...


For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca
Author: OMAFRA Staff
Creation Date: 2 May 2011
Last Reviewed: 10 May 2011