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1. - The Tomato hornworm is a large caterpillar known to be one of the most detrimental pests to tomato, eggplant, pepper and potato plants.

2. - Due to their bright green colour and their tendency to hide on plant stems, it can be very difficult to spot one of these pests with the naked eye.

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2.How can I know my plants are infected by Tomato Hornworm?

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2.How can I know my plants are infected by Tomato Hornworm?

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If you see...

Tomato, eggplant, pepper and potato plant leaves being completely consumed

Bite marks on small stems from the plants

Dark green droppings present on the top of leaves for these vegetables

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3. Introduction about Tomato Hornworm(Picture: Tomato hornworm larvae)

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3. Introduction about Tomato Hornworm(Picture: Tomato hornworm larvae)

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Scientific name: Manduca quinquemaculata (Lepidoptera: Sphingidae)

It is native to United States, and is commonly found throughout north America

Does not typically reach economically damaging levels on commercial farm. However it is still harmful for gardening plant

Tomato hornworms eat only on solanaceous plant, such as tomato. However, their larvae will also attack eggplant, pepper and potato

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Eggs of the tomato hornworm are deposited singly on both the lower and upper surface of leaves in late spring

The eggs hatch in six to eight days and are oval, smooth, light green to yellow. Also it is usually measure 0.10cm in diameter

Larvae are appear in pale green with white and black marking. The first instar is yellow to no marking, later the instars develop into V-shaped.

A black marking on the last segment fives the name “hornworm”

By early fall, the pupae will remain in the soil all winter and emerge as a moth the following spring.

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The larva damages and feeds initially on the upper portions of leaves, leaving behind dark green or black droppings

They blend in with the plant, so it is usually unnoticed until most of the damage is done.

Late instar larvae can destroy leaves as well the fruit.

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Cultural control

Handpicking the hornworms from infected plant is safe and effective option in small planting

If you handpick it carefully, it can reduce the population of tomato hornworm by 90%

Biological control

There are many natural factors that can help to control the hornworm population

The egg stage and early larvae are often prey for ladybugs and green lacewings.

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(Picture)Tomatoes that were eaten by the Tomato Hornworms

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(Picture)Tomatoes that were eaten by the Tomato Hornworms

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They are very harmful to tomatoes, and they also eat other plants like eggplant, pepper and potato plant

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Video:Tomato Hornworm - Large Green Tomato Plant Eating Caterpillar

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Video:Tomato Hornworm - Large Green Tomato Plant Eating Caterpillar

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https://www.youtube.com/watch?v=gRBQpvH_NcM

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Home Page. (n.d.). Retrieved from http://www.pestblog.ca/common-garden-pests-in-ontario/
Mckay024. (2015, June 09). Tomato Hornworm. Retrieved from https://www.vegedge.umn.edu/pest-profiles/pests/tomato-hornworm
Tapq. (2009, June 10). Tomato Hornworm - Large Green Tomato Plant Eating Caterpillar. Retrieved from https://www.youtube.com/watch?v=gRBQpvH_NcM