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 parathion are the insecticides recom- 

 mended for controlling the pickleworm. Lindane usu- 

 ally is most effective. 



The insecticides may be applied as dusts or sprays. 

 Dusts are ready to use when purchased. A spray is 

 prepared by mixing a wettable powder or emulsifiable 

 with water. 



Lindane or parathion: 



25-percent wettable powdet 

 25-percent < 



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Note. — 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. 



A dust should contain 1 percent of either lindane or 

 parathion, and a spray should provide 4 ounces of actual 

 lindane or parathion per acre at each application. 



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.) 



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 lindane in the 

 same dust or spray. If you do this, and make applica- 

 tions every 5 days, you may reduce the amount of 

 lindane applied per acre by one-half. Parathion also 

 may be applied in a fungicide dust or spray, but the 

 amount of parathion applied per acre should not be 

 reduced. 

 EFFECTIVENESS 



Lindane provides effective control of the pickleworm. 

 It also controls cucumber beetles, the melon aphid, and 

 the melonworm. It is of some value against the squash 

 vine borer, but it does not kill dipterous leaf miners. 



Parathion, when properly applied, gives satisfactory 

 protection against the pickleworm, but usually is some- 

 what less effective than lindane against that insect and, 



