Ninth Report of the State Entomologist 373 



ling-moth worm ? Would you advise any more arsenical spraying ? I 

 sprayed for the codling-moth on the 3d and 4th of the present month, 

 and again on the 15th. 



I suppose that all these fruit enemies have their period of active 

 work, after which they retire for the season. Is there anything at this 

 late day to be done that will be of benefit for this j^ear ? Kindly suggest 

 anything that will promise to give relief. I have about a third of a 

 crop of apples at the present showing, some of which are very fine and 

 healthy looking. — N. M. R, Oswego, N. Y., June 29th. 



The apple twigs sent show an unusually severe attack of the apple- 

 tree aphis. Aphis mail Fabr.. which is present in the different 

 stages of its growth. The curled and blighted condition of the leaves 

 and much of the dwarfed and distorted forms of the fruit, shown in 

 No. 1 package, is the result of the operations of this pest. 



The green lice represented as clustering on the fruit where it is cov- 

 ered by the foliage are probably the young of the same insect — none 

 being on the fruit when received, and no other similar species being 

 found on the twigs. I do not know that the apple aphis ever punctures 

 the young apple to feed upon it; nor do I know that it ever clusters 

 under the loose bark of the limbs and trunk of the tree. 



The multiplication of this plant-louse to any approach to that now 

 shown might have been prevented by a few sprajdngs with the kero- 

 sene emulsion when it first appeared; and it is not too late now to 

 derive some benefit from this treatment. 



The "pieces of bark covered with lice" show the peculiar oyster-shell 

 scale of the apple-tree bark-louse, Mytilaspis pomorum (Bouche) — an 

 extremely common pest of the apple-tree. The scale is an 

 excretion from the insect proper which covers the eggs 

 when deposited. These insects, minute as they are indi- 

 vidually, but making up in their incredible numbers, are 

 always injurious to the tree, robbing it of its vitality 

 through the draught made upon its sap, and thus predis- 

 posing it to other insect attacks. The}'- can best be 

 destroyed by spraying them, at the time when the young are 

 hatching from beneath the scale, with a strong kerosene 

 emulsion. (See Fourth Report on the Insects of New York, 

 pp. 114-120.) 



The bud-worm, T/netocera ocellana (Schiff.), has wrought 

 severe injury in the orchards of Western New York this 

 season — greater by far than known before. It should be 

 controllable by arsenical spraying, but, to make this fig. 34.— Scales 

 effective, it must be resorted to early, when the caterpillar t he^appie'^tree 

 oommences to feed upon the leaf buds. Later, it is of j thLsp^s ''^omo- 

 little service. The life-history of this insect has been'^^**" 



