REPELLENTS 
| The most effective and the cheapest way to pre- 
| vent damage is to paint or spray trees and shrubs 
with a chemical preparation that will keep rabbits 
away. 
Several effective rabbit repellents ,have been 
developed at the Cheyenne Horticultural Field Sta- 
tion of the United States Department of Agricul- 
ture at Cheyenne, Wyo. 
The repellents are harmless to trees and shrubs. 
The amount that farm animals may get from eating 
treated foliage is not likely to poison them. The 
repellents are easy to prepare and apply, and cost 
only about $2 a gallon. They have a chemical base 
of nicotine alkaloid or of thiram, an organic sulfur 
compound. 
You can purchase preparations containing these 
chemicals from insecticide and fungicide dealers. 
The following preparations are on the market: 
1. Black Leaf 40, a liquid nicotine sulfate solution 
that contains 40 percent of nicotine alkaloid. It 
is sold as an insecticide. 
2. Arasan, Arasan SF—X, and Tersan 75, powders that 
contain thiram. The first contains 50 percent of 
thiram, the others 75 percent. They are sold as 
fungicides. 
CARRYING AGENTS 
The chemicals should be mixed with a carrying 
agent before they are applied. A satisfactory carry- 
ing agent serves to dilute the chemicals, and it en- 
ables the repellent to stick to trees and shrubs in 
all kinds of weather. 
Suitable carrying agents are water emulsions of 
asphalt or of a synthetic plastic such as vinyl resin 
or acrylic resin. An asphalt water emulsion is 
cheaper than an emulsion of synthetic plastic and 
can be purchased from almost any dealer in build- 
ing supplies or petroleum byproducts. 
