C. Pickleworms in squash flower. © D, Cucumbers deformed as result of pickleworm 
feeding. (About one-half natural size.) © E. Pickleworm-infested cucumber. 
CONTROL WITH INSECTICIDE 
Lindane and Sevin are the insecticides recommended 
for controlling the pickleworm. Lindane usually is most 
effective. 
They may be applied as dusts or sprays. Dusts are 
ready to use when purchased. A spray is prepared by 
mixing a wettable powder with water. Lindane is also 
available in an emulsifiable concentrate for mixing with 
water. 
Norz.—Lindane spray prepared from emulsifiable concen- 
trate is not recommended for cantaloup; it may cause unde- 
sirable flavor. Use of lindane in any form on cantaloup, 
cucumber, and winter squash may have a slight effect on flavor. 
Do not use lindane in fields to be planted later to potatoes or 
other root crops. 
Some injury to the foilage of cucurbit plants may 
occur if several days of rain or high humidity follow the 
use of Sevin. 
Each dust or spray application should provide eithen 
4 ounces of actual lindane or 1 pound of actual Sevin 
per acre. For example, apply 25 pounds of either a 1- 
percent lindane dust or a 4-percent Sevin dust per acre. 
Do not exceed these dosages. 
5 
D 
TC-7344, TC-7341, TC-7342 
Forms of the insecticides that are commonly available 
for preparing sprays are listed below; opposite each is 
shown the amount that should be mixed with water in 
order to prepare a spray of the desired strength. (If you 
buy a product in which the percentage of insecticide 
differs from the one indicated here, use proportionately 
more or less of it.) 
Insecticides and forms 
Amount to apply per acre 
in which they may 
in 20 to 100 gallons of 
be purchased water 
Lindane: 
25-percent wettable powder----.-.--.....- 1 pound 
or 
20-percent emulsifiable concentrate...... 1% pints 
Sevin: 
50-percent wettable powder-.--.-.-.--.-.. 2 pounds 
85-percent wettable powder-.--........--- 1 pound, 3 ounces 
The fungicides zineb and maneb are toxic to young 
pickleworms. If you apply one of these to your cucurbit 
crop for disease control, you may apply either lindane or 
Sevin in the same dust or spray. On cucumber plant- 
ings, if you do this and make applications every 5 days, 
you may reduce the amount of insecticide applied per 
acre by one-half. 
