C. Pickleworms in squash flower, 

 feeding. (About one-half natural 



CONTROL WITH INSECTICIDE 



Lindane and carbaryl (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. 



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. 



Some injury to the foliage of cucurbit plants may 

 occur if several days of rain or high humidity follow 

 the use of carbaryl. 



Each dust or spray application should provide either 

 4 ounces of actual lindane or 1 pound of actual carbaryl 

 per acre. For example, apply 25 pounds of either a 

 1 -percent lindane dust or a 4-percent carbaryl dust per 

 acre. Do not exceed these dosages. 



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 



25-pcrcent wettable powder 1 pound 



20-pcrcent emulsifiable concentrate 1^4 pints 



Carbaryl: 



50-percent wettable powder 2 pounds 



85-percent wettable powder 1 pound, 3 ounces 



4 lbs. /gal. suspension concentrate 1 quart 



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 

 carbaryl in the same dust or spray. On cucumber 

 plantings, if you do this and make applications every 

 5 days, you may reduce the amount of insecticide 

 applied per acre by one-half. 



