14 
INSECTS INJURIOUS TO SUBTROPICAL FRUITS. 
(1) Lime-sulphur (33° Baume) 1 to 75 and blackleaf tobacco ex- 
tract (2J per cent nicotine) 1 to 100; or, using blackleaf k * 40 " (40 
per cent nicotine) tobacco extract 1 to 1,800. 
(2) If lime-sulphur of 36° Baume is used the formula would be. 
lime-sulphur 1 to 86 and blackleaf tobacco extract 1 to 100 ; or black- 
leaf tobacco extract "40" (40 per cent nicotine) 1 to 1,800. 
To load a sprayer having. a 200-gallon tank, proceed as follows: 
First turn water into the tank until nearly full, add 2§ gallons lime- 
sulphur (33° Baume) and 2 gallons blackleaf tobacco extract (2f 
per cent nicotine) ; or 14 fluid ounces blackleaf " 40 ? ' tobacco extract 
(40 per cent nicotine). If the lime-sulphur is 36° Baume, use 2.1 
Fig. 2. — Power spraying outfit in use in spraying for the orange thrips. (Original.) 
gallons, and 2 gallons of blackleaf tobacco extract ; or 14 fluid ounces 
of blackleaf " 40 r tobacco extract. 
HOW TO SPRAY. 
In spraying for the orange thrips only those insects actually hit with 
the spray will be killed. As this insect obtains its food by sucking the 
plant juices, stomach poisons are of no avail. In order to spray with 
greatest efficiency it is necessary to use a gasoline power sprayer, 
maintaining a pressure of 180 to 200 pounds. (See fig. 2, showing 
a power outfit in operation.) Angles or elbows should be used on all 
spray rods so that " overshot " and " undershot " spraying can be 
done; that is, spraying from above downward, and from below up- 
