. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). San Jos^ Scale. Scurfy Scale. Oyster-shell Scale. Fig. 195. The three common scales infesting the apple. Oyster-shell scale. (Fig. 195.) This is an elongate scale, J inch in length, resembling an oyster shell in shape and often encrusting the bark. It hibernates as minute white eggs under the old scales. The eggs hatch during the latter part of May
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). San Jos^ Scale. Scurfy Scale. Oyster-shell Scale. Fig. 195. The three common scales infesting the apple. Oyster-shell scale. (Fig. 195.) This is an elongate scale, J inch in length, resembling an oyster shell in shape and often encrusting the bark. It hibernates as minute white eggs under the old scales. The eggs hatch during the latter part of May or in June, the date depend- ing on the season. After they hatch, the young may be seen as tiny whitish lice crawling about on the bark. When these young appear spray with kerosene emulsion, diluted with 6 parts of water, or whale-oil or any good soap, i lb. in 4 or 5 gals, of water. This whitish pear-shaped scale, about \ inch in length, often encrusts the bark, giving it a scurfy appearance. It hibernates as purplish eggs under the old scales. Spray as recommended for oyster-shell scale. The presence of this minute mite is indicated by small irregular brownish blisters on the leaves. Spray in late fall or early spring with the home-made lime-sulfur or with the concentrated lime-sulfur solutions, i gal. in 10 gals, of water. Geneva Bulletin 306. Round-headed The only practicable method of control is to dig borer. out the borers or kill them with a wire. The insect hibernates in the egg state. The eggs are glued in ring-like brownish masses (Fig. 196) around the smaller twigs where they may be easily found and destroyed. The caterpillars appear in early spring, devour the tender leaves, and build un- sightly nests on the smaller branches. This is usually con- trolled by the treatment recommended for the codling-moth. Des- troy the nests by burning or by wiping out when small. Scurfy scale. (Fig. 195.) Leaf blister-mite. Apple tent- Fig. 196. Egg ring of appl
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