New YorK AGRICULTURAL EXPERIMENT STATION. 2601 
pear trees by careful pruning and by spraying during the late fall 
or early spring with kerosene emulsion, miscible oils or the sulphur 
washes. st 
| MISCELLANEOUS FRUIT INSECTS. 5 
Two bulletins have been issued by the Station which contain mis- 
cellaneous notes on various insects. These deal with subjects that 
were of too little importance at the time to be the objects of ex- 
tended investigation, but were of too much interest to be laid aside; 
or with topics upon which immediate information was desired. 
The first species discussed in the first bulletin?’ is the fruit bark- 
beetle. (Scolytus rugulosus Ratz.). This is a common pest of 
stone fruits, especially peaches and plums, and was very destructive 
in 1900, throughout the State. Observations were made on the 
insect and have been continued to the present as the basis for a 
more complete treatise. During the same year observations were 
made on a mealy bug (Dactylopius sp.) attacking quince trees in 
the vicinity of Geneva. Interest was aroused in this occurrence 
of this insect as it belongs to a genus of scales, of which, in this 
latitude, there had been no species represented which could be 
classed as a fruit pest. The quince trees were literally alive with . 
the mealy bugs and there were indications that a new pest of this 
fruit was in the making. Studies were made of the various stages 
of the insect and attention was called to methods of treatment by 
which protection could be afforded the trees. Mention is also made 
of two apple leaf-miners (Tischeria maltfoliela Clemons and Ornix 
prunivorella Cham.) which during the same summer caused some 
little apprehension on the part of fruit growers in the western part 
of the State. As a matter of record, mention was made of injury 
to peaches at Rochester by the tarnished plant-bug (Lygus pra- 
tensis L.). 
During the spring of 1900 some observations were made of the 
palmer worm (Ypsolopus pometellus Harr.) which overran many 
apple orchards in western New York. It was most abundant in 
Erie, Niagara, Orleans, Genesee, Monroe, Ontario, Wayne and 
Cayuga counties. The records of the insect show that it appears in 
large numbers only after long periods of years and usually its dis- 
appearance is as sudden as its rise to destructive numbers. Inquiry 
during the following season disclosed the fact that history had re- 
peated itself and that the species had practically disappeared. 
7 Bul. 180; same in Rpts. 19 1263-286 (1900). 
* Bul. 212; same in Rpt. 21:233-257 (1902). 
