. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 110 DECIDUOUS FKUIT INSECTS AND INSECTICIDES. the buds have advanced so far as to have the green tips exposed. If the above precautions are carefully followed in applying the mis- cible oil, danger of injury to trees will be reduced to the minimum. There are a number of good commercial brands of miscible oil on the market. These miscible or soluble oils are so made that they mix readily with water. The material may be applied either by hand pump or gasoline-power sprayers. Power outfits are to be preferred. Never
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 110 DECIDUOUS FKUIT INSECTS AND INSECTICIDES. the buds have advanced so far as to have the green tips exposed. If the above precautions are carefully followed in applying the mis- cible oil, danger of injury to trees will be reduced to the minimum. There are a number of good commercial brands of miscible oil on the market. These miscible or soluble oils are so made that they mix readily with water. The material may be applied either by hand pump or gasoline-power sprayers. Power outfits are to be preferred. Nevertheless, whichever kind of outfit is employed, it is essential that it be provided with a good working agitator. To do effective work it is also necessary to have sufficiently long spray rods and leads of hose. Nozzles with medium-sized holes or apertures are recom- mended. Miscible oils at the strength recommended for the destruction of the eggs of the fruit-tree leaf-roller are valuable in controlling scale insects such as the San Jose scale (Aspidiotus perniciosus Comst.), Howard scale (Aspidiotus Jiowardi Ckll.), etc. Orchards sprayed with the oil for the leaf-rollers will not require the usual application of lime-sulphur for the San Jose or Howard scales. In conjunction with the oil treatment in badly infested districts it is recommended that a very thorough application of arsenate of lead, at the rate of 3 pounds to 50 gallons of water, be applied when the larvae are emerging from the eggs. The larvae will be found to be hatching just as the cluster buds on early-blooming varieties of apple are beginning to separate. The necessity for making this application will depend largely upon the thoroughness with which the miscible oil was applied. ADDITIONAL COPIES of this publication â ^ may be procured from the Superintend- ent of Documents, Government Printing Office, Washington, D. C, at 10 cents per copy. Please note that these images are extracted from scanned page images
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