INSECTICIDES AND EQUIPMENT FOR CONTROLLING INSECTS 13 



Geraniol and eugenol are used in Japanese beetle traps ; oil of sas- 

 safras (natural), bromostyrol, oil of anise, and geraniol in sugar 

 solutions are used to trap codling moths. Terpenyl acetate and ethyl 

 cinnamate in sugar solutions have proved very attractive to the oriental 

 fruit moth. Amyl salicylate is used as an attractant for tobacco 

 hornworm moths. Preservatives such as sodium benzoate. and poisons 

 such as tartar emetic, sodium arsenite, and nicotine sulfate may be 

 added to the sugar-aromatic combinations. 



ETHYLENE DICHLORIDE 



Ethylene dichloride (CHXl-CHXl). which is manufactured in 

 this country, is a colorless liquid having a sweetish odor similar U) 

 that of chloroform. The vapor is heavier than air and penetrates the 

 soil readily. The chemical burns with difficulty when ignited. 



It is used in the form of an emulsion for control of the peach-tree 

 borer, the amount required depending upon the age and size of the 

 tree. Prepared emulsions of ethylene dichloride are available on the 

 market, or they may be made up as follows: Stir 9 parts by volume 

 of ethylene dichloride into 1 part of a potash fish-oil soap containing 

 about 30 percent of actual soap. Dilute and use as recommended 

 by the county agricultural agent. State agricultural college. State 

 entomologist, or the United States Department of Agriculture. 



A mixture of 3 parts of ethylene dichloride and 1 part of carbon 

 tetrachloride is used as a fumigant to control the gladiolus thrips on 

 the dormant conns while in storage. 



Caution. — When the vapor of ethylene dichloride is inhaled it 

 has an anaesthetic action, although less rapid than that of 

 chloroform. Unless it is breathed in high concentrations over a long 

 period of time, no harmful results need be feared. 



FISH OIL 



Various domestic fish oils having iodine numbers of 120 to 145 

 are sometimes used as adhesives for lead arsenate in the control of 

 the codling moth and gypsy moth. 



Usually 1 pint of the oil and 3 pounds of lead arsenate are used 

 per 100 gallons. The inclusion of 1 part of oleic acid in 19 parts of 

 the fish oil generally improves the type of lead arsenate deposit 

 obtained. 



Fruit sprayed with lead arsenate and fish oil can be cleaned more 

 easily with alkaline than with acid washes. 



HELLEBORE 



Hellebore, the ground root of the plant false hellebore (Veratrum 

 album in Europe or V. viride in the southeastern part of the United 

 States), is no longer much used, but formerly it was known to 

 gardeners as a remedy for the control of sawnies on currant and 

 gooseberry. For use as a spray, add 1 or 2 ounces of this material to 

 a gallon of water. When used as a dust, 1 ounce of hellebore is 

 diluted with 5 or 10 ounces of flour, talc, or lime. It has been used 

 also as a larvicide for houseflies in manure. 



