Colorado potato beetle

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Material Information

Title:
Colorado potato beetle
Physical Description:
Mixed Material
Creator:
Benson, Mary F
United States -- Bureau of Entomology and Plant Quarantine
Publisher:
Bureau of Entomology and Plant Quarantine, U.S. Dept. of Agriculture ( Washington, D.C. )
Publication Date:

Record Information

Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 030255723
oclc - 86173758
System ID:
AA00017537:00001


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COLORADO

POTATO BEETLE


W A
'4


6' 6


a, Adult beetle; b, eggs; c, larvae (or slugs); d, pupa (or
stage). (a, c, and d about natural size; b about twice
size.)


resting
natural


(See other side for life history and control)

Bj-,.r,, off [.nttm,,lo v g in,.l Plint Quardnthi t ne
.1:ni.ed Stat-e Drrt.'-nt t Ait ,ri.Uijrt Picture rheet No. 3


----I





COLORADO POTATO BEETLE


(Leopti,,,t i ori,.11ii .r' i nr li iti .Say)
Life Hlistory
The eggs of the Colorado )potato beetle are laid on the under side
of the leaves. These eggs hatch in from 4 to 9 days. The resulting
larvae (or slugs) feed on the plant. The larva grows rapidly, pass-
ing through four different stages, or instars, similar in appearance
except that each stage is larger than the preceding one. It becomes
full grown in from 10 days to 3 weeks after hatching from the egg.
The full-grown larva then burrows into the ground and changes to a
l)LaI) or resting stage. After 5 to 10 days the adult beetle emerges
from the pupa, crawls up out of the ground, and, after feeding on
the plants for a few days, may lay eggs for another brood of larvae.

Control

Spray or dust with paris green or calcium arsenate.
Use 1 pound of paris green and 4 pounds of hydrated lime, or
1 pounds of calcium arsenate and 8 pounds of hydrated lime, to 100
gallons of water. For smaller quantities use 2 level teaspoonfuls
of paris green and 2 level tablespoonfuls of hydrated lime, or 10
level teaspoonfuls of calcium arsenate and 10 level tablespoonfuls
of hydrated lime, to 1 gallon of water; or 6 level teaspoonfuls of
paris green and 2 ounces (6 level tablespoonfuls) of hydrated lime,
or 2 ounces (9 level tablespoonfuls) of calcium arsenate and 8
ounces (24 level tablespoonfuls) of hydrated lime, to 3 gallons of
water. Mix the poison with a small quantity of water and then
stir it thoroughly into the spray container. Keep the mixture well
agitated. Apply it with a good pump sprayer throwing a fine mist.
Cover the foliage completely.
For dusting, use 1 pound of paris green to 12 pounds of hy-
drated lime or flour, or 1 pound of calcium arsenate to 7 pounds of
the diluent. For smaller quantities use 1 ounce (1, level table-
spoonfuls) of paris green and 12 ounces (36 level tablespoonfuls)
of hydrated lime or flour, or 1 ounce (41 : level tablespoonfuls) of
calcium arsenate to 7 ounces (21 level tablespoonfuls) of hydrated
lime or flour. Cover the foliage completely.
Begin spraying or dusting when the beetles first appear. Spray
or dust for the slugs when eggs are hatching, and repeat the treat-
ment as often as necessary.

UNIVERSITY OF FLORIDA

3 1262 09082 4797

June 19:''7 U. S. Governmeient Printing Office
Fr sal(. by the Supelriiitunel'iit of Dicuimenlts, Washington, D. C.-Price 5 cents




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