444 Various Scale Insects. 
Oyster Sheli Scale of Apple (Mytilaspis pomorum).—This is 
one of the few insects which the northeastern States have in 
common with us. Like the preceding one, it has only one 
brood during the season. It affects the apple chiefly, although 
sometimes the pear also. Owing to the thickness of the armor, 
it is one of the most difficult of the scales to exterminate. It 
can be easily recognized by the engraving, which shows a piece 
of bark covered with it. 
Rose and Berry Scale (Diaspis rosae)-—This scale has such 
striking forms that it can be readily recognized. The round 
white scale is that of the female, the elongated one with ridges is 
the male. The rose scale infests, besides roses, various fruit 
bushes, especially blackberries and raspberries. Remedy: For 
raspberries and blackberries the cutting down of the canes to the 
ground should be adopted, and the stumps sprayed or washed 
with kerosene emulsion, recommended under the head of gen- 
eral remedies for scale insects. : 
Oleander Scale (Aspidiotus nerit)—This scale is small, flat, 
yellowish-white. It affects a great many trees, especially ever- 
greens. Lemon trees become badly affected, and the fruit is 
sometimes completely covered. The olive is also subject, and 
the fruit of the olive when infested does not mature well, and 
wherever a scale is found, a green blotch shows its appearance. 
Red Scale of Orange and Lemon (Aonidia aurantu)—This 
scale affects citrus trees in both the coast and interior regions. 
The scale fully grown is one-twelfth of an inch or a little more 
in diameter, center yellow, margin light brown. The apearance 
of trees infested with this pest is very striking, very much resem- 
bling those diseased from other causes, such as bad drainage, 
the leaf presenting a mottled appearance, a light blotch around 
the scale contrasting with the natural green of the leaf. The 
branches are but little troubled, but the fruit, like the leaf, be- 
comes completely covered with the insects. An orange tree 
infested with this scale gradually becomes sickly and languishes. 
Other Citrus Tree Scales-—Two scales more recently 
brought into this State from Florida are the “purple scale,” 
Aspidiotus citricola, and the “long scale,’ Aspidiotus gloverii. 
The red and purple scales of citrus trees are only treated suc- 
cessfully by fumigation with hydrocyanic acid gas. This treat- 
ment is an elaborate one, requiring special appliances which are 
fully illustrated and described in Bulletin 122, which can be had 
