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Posts Tagged ‘Arthropoda’

Tarnished Plant Bug

Thursday, May 6th, 2010

Tarnished Plant Bug

Common names: Tarnished Plant Bug

Scientific name: Lygus lineolaris

Region: This bug can be found throughout North America.

Life cycle: This insect produces three to five generations each year.  Overwintering occurs by the adult or nymph bug in garden debris, under leaf mold, stones, or tree bark, or in clover, and alfalfa.

Physical Description: This 1/4 inch long bug is green to brown with yellow, brown, and black markings, and a yellow triangle at the ends of the fore wings.  The curved, elongated eggs are laid or inserted in the stems, tips, and leaves of the host plants.  The nymphs are smaller, a pale yellow to green and bear black dots on the thorax and abdomen.

Feeding characteristics: This pest, adults and nymphs, attacks most fruits and vegetables by sucking on stem tips, buds, and fruits.  While feeding, the bugs apparently inject a poisonous substance into the plant that kills the surrounding tissue, deforms roots, blackens terminal leaves, dwarfs and pits fruits, and ruins flowers.  They appear in early spring and are most numerous toward the end of the summer.

Controls: Becautilize this bug is very active, sprays are limited in their effectiveness unless utilized early in the morning when the bug is sluggish due to the cold.  The best control is prevention through clean culture.  Dusting with sabadilla will take care of serious infestations.

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Tomato Hornworm

Thursday, May 6th, 2010

Tomato Hornworm

Common names: Tomato Hornworm

Scientific name: Manduca quinquemaculata

Region: This Caterpillar is found throughout North America.

Life cycle: This insect produces one to two generations each year.  The eggs are deposited singly and hatch within three to eight days.  The larvae reach full size in three to four weeks of steady eating.  Overwintering is done as hard-shelled pupae, three to four inches below the surface of the soil.  The moths appear in May or June.  One generation is common in the North, while the South may have to contend with two or more.

Physical Description: This 4-inch long caterpillar is green with seven or eight white stripes and a black horn sticking out from the rear.  A similar caterpillar is the tobacco hornworm.  The adult moth is gray or brown with white zigzags on the rear wings and orange or brown marks on the body, and has a wingspan of 4 to 5 inches.

Feeding characteristics: This pest attacks eggplant, pepper, potato, and tomato plants by chewing the leaves and fruits.

Controls: The Braconid Wasp lay eggs on Caterpillars, forming little white cocoons on the skin.  Trichogramma Wasps parasitize hornworms in the egg stage.

Most plants can tolerate some feeding, but if the caterpillars become a problem, handpicking is the best approach.

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Walkingstick

Wednesday, May 5th, 2010

Walkingstick

Common names: Walkingstick

Scientific name: Diapheromera femorata

Region: This insect is found in the eastern portion of the United States.

Life cycle: This insect produces just one generation each year and overwinters as an egg.

Physical Description: This 3-inch long insect is brown or dark green, very thin with a body like a stick, and can easily camouflage itself in trees and shrubs.  Its eggs are black and are deposited on the ground.

Feeding characteristics: The insect is common to the cherry tree and may feed extensively on the foliage, but damage is never serious.

Controls: None required, damage is never serious.

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