Title: Identification of worms on cabbage and potatoes in the Hastings area
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 Material Information
Title: Identification of worms on cabbage and potatoes in the Hastings area
Physical Description: Book
Creator: Workman, Ralph B.
Publisher: Agricultural Research Center,
Copyright Date: 1974
 Record Information
Bibliographic ID: UF00076349
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: 144723586 - OCLC

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AGRICULTURAL RESEARCH C'ETER
THastings, Florida

Hastings Research Report PR-1974-1 February 1, 197,

IDENTIFICATION OF WOR ON CABBAGE AND POTATOES IR TITF HASTINGS AREA
R. B. workman, Assoc. Entomologist

A number of different worms attack cabbage and potatoes in the Hastings area.
As an aid to growers, fieldnen, and other interested -ersons in identifying the
more common of these insects, this report lists some of the major differences which
separate one species from another. A small hand magnifier will heln in seeing the
identifying characteristics of starred (*) insects. The length and characters
given are for mature worms. Younger stages may differ somewhat. Colors of several
species vary from light to dark but patterns of lines or spots tend to remain the
same. Some of the species may look alike, at first, until a little experience is
gained. Questionable specimens can be brought to the Agricultural Research Center
where they can be sent to insect taxonomists at the University of Florida or the
Florida Department of Agriculture and Consumer Services at Gainesville for a cor-
rect identification.

1. Beet arm~rorm',-l 1/4", varies from light-green to black with indistinct lines

along the back and sides. An irregular-shaped black spot is found on the side

just above the 3rd set of legs from the head. Feeds on cabbage and potato leaves.

2. Black cutworm*-1 1/2", shiny gray-preen to black. Dark head with a broad

lighter line on the back to a dark tail. Dark spots about hairs with 2 larger ones

(0) on the side of each segment. Usually in the soil. Cut off cabbage transplants

or feed in cabbage heads and in potato tubers.

3. Cabbage looper-1 1/4", light to medium-green looping worm with only 2 pairs of

legs on the rear segments (8 and 9th). Feeds on undersides of cabbage leaves and

heads and on the leaves of potatoes.

4. Cabbage webworm-5/3", yellowish with 5 brown to purplish stripes along the

back. Feeds on budding cabbage and fastens silk threads around the feeding area

which trap dirt and debris.

5. Corn earworm*-l 1/2", yellow-green to black with dark stripes along the back

formed by very fine spines. Dark blotches behind the head and dark spots about

hairs on the body. Found in the fall, often feedif <'-ns'"e"- i J Y cabbage.
HUME LIBRARY
A common worm on corn and sorghum.

APR 1 1974


.F...S. Univ. of Ficrida






6. Diamondback moth-1/3", cream to light-green. Feeds on cabbage buds or leaves

making small "shot" holes. Tiggles actively and hangs by a silk thread when dis-

turbed. Pupates in a thin gauzy sack on the underside of the leaf.

7. Fall armyworm*-l 1/4", tan to black with 3 narrow light stripes down the back.

Yellow and dark stripes splotched with red on the sides. Head light to dark with

white blotches. Attacks fall cabbage. Common on corn and sorghum.

8. Granulate cutworm*-l 1/2", dull, light-brown otherwise similar in description

and habit to the black cutworm.

9. Imported cabbage worm-1 1/4", leaf-green with 5-6 folds per segment. Many

small hairs give a velvety appearance. Adult a white butterfly with 1-2 dark spots

and dark tips on the forewings. On cabbage in the spring.

10. Southern armyworm*-l 1/4", gray-green with 2 rows of elongate triangles on

back. White stripe on side tinged with pink. Bicolored spot intersects white

stripe on segment just behind the 3rd pair of front legs. Usually attacks fall

cabbage.

11. Southern beet webworm-l", shiny, dark-green with dark-brown head. Dark spots

about hairs. Folds and webs leaves together with silk threads. Feeds on cabbage.

Common on pigweed.

12. Soybean looper*-1 1/4", similar to the cabbage looper except has dark spots

on head and about hairs. First 3 pairs of legs are usually dark. Found on cabbage,

potatoes, and okra.

13. Potato tuberworm-1/2", greenish to pinkish-white, shiny, with dark head, Wig-

gles actively when disturbed. Burrows in leaves or tubers, making a lined tunnel

in the tuber. Attacks potato and eggplant. Common during dry seasons.

14. Southern potato wireworm-5/8", straw-colored, cylindrical, with head and tail

dark and flattened. Mouthparts extend forward. Found in the soil and in potato

tubers. Tunnels in the tubers are unlined.

2-1-74 2
300 copies




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