. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 14 INSECTS IXJUKIOUS TO SUBTROPICAL FRUITS. (1) Liiue-sulpliiir (3;3^ Baume) 1 to 75 and blackleaf tobacco ex- tract (2f per cent nicotine) 1 to 100; or, using blackleaf ''40" {40 per cent nicotine) tobacco extract 1 to 1,800. (•2) If lime-sulpliur of 3G° Baume is used the formula would be, lime-sulphur 1 to 8G 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 wate
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 14 INSECTS IXJUKIOUS TO SUBTROPICAL FRUITS. (1) Liiue-sulpliiir (3;3^ Baume) 1 to 75 and blackleaf tobacco ex- tract (2f per cent nicotine) 1 to 100; or, using blackleaf ''40" {40 per cent nicotine) tobacco extract 1 to 1,800. (•2) If lime-sulpliur of 3G° Baume is used the formula would be, lime-sulphur 1 to 8G 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 (2| per cent nicotine) ; or 14 fluid ounces blackleaf " 40 '' tobacco extract (40 per cent nicotine). If the lime-sulphur is 36° Baume, use Fig. 2.—i'ower sprayins' outlit in usf in si)rayiug for tlie uiauj;u iluips. (Original.) gallons, and 2 gallons of blackleaf tobacco extract; or 14 fluid ounces of blackleaf " 40 " 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 " ; and " undershot'' spraying can be done; that is, spraying from above downward, and from below up-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectentomology
