INSECTS AFFECTING PARK AND WOODLAND TREES I9I 



nearb)- limlss, some attachinj^r themselves to leaves, others locating; in 

 crevices at the axil of leaves and at the base of buds, only a portion of 

 those at the base of buds surviving" the winter. Minute young of this 

 generation are almost invisible, Init as the winter approaches they secrete 

 from the dorsal pores a coating of coarse, white threads, which make them 

 more conspicuous. The old winter coat is molted in the spring, about the 

 third week in April, after which a more copious wooly coating is produced. 

 The first eggs were observed at Amherst Mass., May 9. 



Natural enemies. This species is subject to attacks b)- several natural 

 enemies. The larva of the common lace-winged tl_\', C h r y s o p a a r c u a t a 

 Say., feeds voraciously on the nymphs of this insect as they issue from the 

 galls. Protection of smaller insectivorous birds such as tits, the nuthatch 

 and golden-crested wren, has been recommended because they probably 

 prey on this plant louse to some extent. 



Remedial measures. Thorough spraying of infested trees in April, 

 with a whale oil soap solution, i lb to 2 gal. of water, has proved very 

 effectual in checking this insect. The galls may also be cut off and burned 

 in June, thus destroying the insects. 



Bibliography 

 1897 Cooley, R. A. Mass. Agric. Col. 34th Rep't, p. 91-99 



Rose leaf hopper 



Tvpltloc\'ba I'osac Harris 



Small, yellowish white, jumping insects about Vfj inch long occur in swarms during 

 midsummer, on rose leaves. 



This is one of the common pests of rose growers and occasionally these 

 small leaf hoppers cause a great deal of injur)-. They winter under fallen 

 leaves and rubbish on the surface of the ground and appear on rose bushes 

 some time in May, occurring on the underside of the foliage, in all stages, 

 during the greater part of the summer. They draw the sap from the foliage 

 and thus produce whitish, discolored spots which, if tht; injm-y be severe, 

 results in the affected leaves turning yellow and dropping. 



