420 



apple bucculatiix {Bucculatriic pomifoUella), cberry-trce tortrix {Gacoecia 

 cerasivorana), cberry-tree scallopsbell luotli {Hydria undulata), a leaf 

 roller on the cnrraiit [Cnewv'm rosana), a blackberry caDe-borer (O&erm 

 himaculata), aud the snowy tree-cricket {Oemntlms ni-veus). 



Fear -leaf blister, — A disease of pear leaves observed in Western New 

 York has been found to be caused by Fhytoptus pyri. Eeference is 

 made to accounts of this disease by Burrill and Sorauer. The symptoms 

 of the disease, structure of the leaf gall, appearance of the mite, and its 

 life history are described and illustrated. The authors found the num- 

 ber of rings on the body of the insect to be much greater than is stated 

 by Sorauer. Experiments with kerosene emulsion as an insecticide for 

 this mite gave only negative results. Pruning the young wood after 

 the mites have gone into winter quarters in the terminal buds, and 

 burning the fallen leaves and rubbish in the orchard are the only eflect- 

 ive means for destroying these insects. 



A stag-beetle borer in the pear. — Dorcus parallehis was found at Elmira, 

 Kew York, "in the roots of an old pear tree, where it had eaten ofi" one 

 of the branch roots, which was about 2 inches through, and the tap- 

 root, which was nearly 3 inches through, and was eating upwards in the 

 tap-root when discovered," 



The apple bucculatrix. — This pest of the apple is becoming very abun- 

 dant in some parts of 'Ne-w York. A review of what is known about 

 this insect is given, especial use being made of the results of Dr. Bruun's 

 studies, published in the Annual Report of the station for 1883 (pp. 

 157-lGl). Experiments showed that the pupro in cocoons attached to 

 the larger branches and the trunk may be destroyed by a strong kero- 

 sene emulsion. 



A- small .aiiiouut of pure kerosene applied in a fine spray killed every pupa ; and as 

 tlie oil evaporated in a few hours, it is quite iirobable that the dormant wood was not 

 injured. Still, I am unwilling- to advise the use of kerosene in this way before trying 

 further exj)eriment8. And I believe that a more practicable method of fighting the 

 pest is suggested by the I'act that during the greater portion of its larval existence it 

 feeds exposed on the surface of the leaves. If, therefore, the infested trees be liber- 

 ally sprayed with Paris green water during the latterhalf of June the larvai will be 

 poisoned. 



The cherry-tree tortrix. — The insect and its nest are described and 

 illustrated. The eggs were not observed, but it is considered probable 

 that they are laid in a cluster near the ends of branches and do not hatch 

 until spring. 



As no black currant (the plant upon which the eggs were found) was at hand, the 

 larviB were placed on the common red currant, where they wore perfectly contented. 

 * * * Proliably the most practicable method of destroying this insect, should it 

 become a serious post, would be the careful pruning and burning of the infested leaves 

 and twigs. As the insect is concealed in the ndled leaves during its larval existence, 

 the application of arsenical sprays would probably be of little use. 



A blaclcberry cane-borer. — An account of observations on Oberea bimac- 

 ulafa found infesting blackberry canes near Kidder's, l!^ew York, in 

 1888. Infested canes should be prom])tly cut and burned. 



