What kills corn earworm?

Applying mineral oil to the silk where it inserts into the ear is an effective treatment to get rid of earworms. The oil suffocates the larvae. There are insecticidal sprays that are used for earworm control in corn, but great care should be taken in the use of these products.

How do you scout a corn earworm?

When scouting for earworm eggs in corn, sample five areas of the field, 20 ears from each area (total of 100 ears). Clip silks from corn ear and place in plastic bag. Examine the silks for eggs by separating over a black or dark colored surface. Also examine ears for larval damage.

What does the corn earworm do?

The corn earworm (CEW), also known as the tomato fruitworm or cotton bollworm, is a pest of corn, tomato, cotton, beans, alfalfa, and tobacco. The larvae will feed on foliage, but prefer to feed on the more nutritious tips of corn ears, tomato fruit, and bean pods. …

Where should pheromone traps be placed?

In small areas, we recommend three to four traps per 1,000 square feet, but in larger areas such as warehouses and retail stores, placing traps every 25-50 feet apart on a grid pattern is the recommended rate.

How do you know if you have a corn earworm?

Identification: Mature corn earworm moths have a wingspan of about 1 1/2 inches. Olive-gray to dusty brown, they have a dark spot on each forewing and dark bands across pale hind wings. The destructive larvae grow up to 2 inches long and have thorny microspines.

What does a corn earworm look like?

Description: The larvae of a nocturnal moth, corn earworms are usually muddy brown caterpillars, although some may be green, yellow, pink, reddish brown or dark gray. The colors of corn earworms tend to be pale when they feed on corn, and darker when they feed on tomatoes.

How long does it take for a corn earworm to turn into a moth?

Duration of the pupal stage is about 13 days (range 10 to 25) during the summer. Adult: As with the larval stage, adults are quite variable in color. The forewings of the moths usually are yellowish brown in color, and often bear a small dark spot centrally.

Do corn earworms turn into moths?

They stop feeding when the silk becomes dry, then move to the tip of the ear, where they feed on the kernels for 2-4 weeks. After the 5th molt, the larvae drop to the ground to pupate, emerging later as adult moths. Late corn is the most vulnerable, since it can be attacked by both local and migrating moths.

How long do pheromone traps last?

In general all pheromone lures are good for 60 days. After that, they should be replaced with a new lure.

What do pheromone traps attract?

Pheromone traps are very sensitive, meaning they attract insects present at very low densities. They are often used to detect presence of exotic pests, or for sampling, monitoring, or to determine the first appearance of a pest in an area.