49 



abundant. Injury from succeeding broods was not noticed, and the 

 damage apparently was occasioned ])y the over-wintering adults. 



The black peach aphis (Aphis persicse-niger) was noticeably injuri- 

 ous in certain peach nurseries on the eastern shore. Injury was 

 probably at its height b}^ May 1, and later reports indicated that the 

 lice had largely disappeared from the nurseries by the middle of the 

 month: The aphis was occasionally observed on old peach trees here 

 and there in the State throughout the summer. A badly infested 

 peach tree was observed in Frederick December 22 with lice of all 

 ages, notwithstanding the fact that freezing weather had been experi- 

 enced in this locality on several occasions previous to this date and a 

 heavy snow had just disappeared from the ground. 



The apple-leaf aphis {Ajyhis spp.) seems to have been more than 

 usually abundant in early spring, attacking the young unfolding 

 leaves. Many complaints were made of this pest, and it was necessary 

 to prescribe remedial measures. In one instance whale-oil soap at the 

 rate of 1 pound per gallon of water was used without injury to the 

 young foliage. Injury from this insect, however, was not particu- 

 larly noteworthy during the summer, and complaints largely ceased 

 with the passing of the brood from the f)ver-wintering eggs. 



Melanoplus hivittatus was abundant at Hancock and near Keedys- 

 ville, both in Washington County. In the former instance consider- 

 able injury had been done to newly planted apple trees. The clover 

 in an adjacent field had been cut, and the insects turned their attention 

 to the apple trees, quite stripping several adjacent rows of foliage 

 and bark. The grasshoppers were full fledged by June 18, after 

 which date injury soon ceased. Attempts to secure eggs of this spe- 

 cies confined in large breeding cages failed utterly, although the 

 insects were given every attention which appeared necessary. 



The green pea louse {NectaropJiora pisi) failed to put in its appear- 

 ance in time to injure early peas. This seems to have been the case 

 during the last two or three years, and the practice of planting early 

 peas is a method largely in vogue among Maryland growers to avoid 

 injury from this pest. A. correspondent from Middleburg sent potato 

 tips thickly infested with the Nectarophora sp. under date of June 

 24. He stated that the insects had made their appearance over night. 



The onion maggot {PJwrhla ceparum) was reported as having been 

 injurious to onions during the previous year hj Mr. J. Kolb, of Roj^al 

 Oak, Md., under date of June 21, 1902. No reports were received of 

 injury during the present 3^ear. 



The strawberry weevil {An tlwnomus s ic/natus), has been quite destruc- 

 tive to the strawberry crop both on the eastern shore and in western 

 Maryland. The destructive work of the insect was variously placed 

 by different growers at from 25 to 50 per cent of the crop. Certain 



22170—03 4 



