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Western Corn Rootworm – Diabrotica v. virgifera

Available Products
212 mg Standard Lure
Dispenser Details
Semi-permeable sachet
Active Life
4-6 weeks (temperature dependent)
Pest Details
Adult
Body length of 4.4 – 6.8 mm. Pronotum is shiny yellow and abdomen is yellow and usually has three dark stripes that may or may not converge; a sutural stripe and two lateral darker stripes. The head is shiny with the vertex (top of head) amber in colour. Antennae of males are ca. 4.2 mm in length and longer than in females. Antennal segment 3 is 1.5 times longer than segment 2. Legs are yellow to tawny brown.
Larvae
Ca. 10mm long when fully grown, slender and white to pale yellow in colour with a yellowish-brown head capsule and a brownish plate on the posterior abdominal
segment.
Eggs
Oval, beige and ca. 0.5mm in length. Generally laid in the top 5-20 cm of soil. The overwintering stage, usually hatching in May
Distribution
North America, Central America and Europe.
Economic Host(s)
Maize, wheat and cucurbits such as pumpkin and marrow.
Symptons/Signs
Newly hatched larvae feed on root hairs but later instars bury into the plant roots to feed with damage being most severe when plants have developed their secondary root systems. Root tips will appear brown and contain tunnels. Larvae may burrow through plant tissue at the base causing stunting or death of the growing point. Early symptoms appear as nutrient deficiencies with plant lodging occurring later on. Secondary infections can occur at sites of larval damage.
Generations
1
Monitoring
Adults Present
Typically late June to October
Recommended Trap Density
2 – 5 traps per hectare. Higher trap densities are recommended for heterogenous crop stands.
Trap Maintenance
Check traps on a regular basis, at least twice a week. It is recommended to replace these dispensers every 4 weeks to achieve optimum results. Replace sticky inserts, if used, when they become filled with dust or insects.
Storage
Keep product away from direct sunlight, heat, sparks and open flame. Store in a refrigerator for a shelf life of 12 months or a freezer for an extended life of 18 months. Always store sealed in original packaging.
Recommended Trap
View Trap

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