756 EXPERIMENT STATION RECORD. [Vol. 40 



24, and of the third generation as early as August 3. In May the eggs hatched in 

 from 9 to 13 days, and in July and August in from 3 to 12 days. The larval 

 stages averaged 19.5 days, and the pupal stage averaged 6.6 days. The lon- 

 gevity of the female moths, which may deposit as many as 136 eggs, varies from 

 3 to 28 days, with an average of vk2 days. 



Control work has led to the recommendation that lead arsenate paste be used 

 at the rate of 3:50. This may be applied effectively three times during the 

 season, the first when the earliest blossoms appear, or about May 1; the second 

 after the crop is oft, or about July 1 ; and the third late in August. The May 

 application is the most important. Mowing over the strawberry foliage imme- 

 diately after the crop is harvested is no less valuable a measure. The mowed 

 leaves should be raked off and burned as soon as dry. 



A preliminary account by the author lias In en previously noted (E. S. It.. ."Is. 

 p. 862 1. A list of 19 references to the literature is Included. 



A comparison of several species of Lepidoptera infesting peach and apple 

 in Maryland, with additional notes on the oriental peach moth, P. QABMAN 

 i Maryland Sta. Bui. 828 1 1918), pp. t03-~186, figs. 86). -The author flrsl presents 

 a comparison of the oriental peach moth [Laspeyresia molesta) with several 

 native, more widely distributed, and better known species, namely, L. pruvirorrt. 

 Enarmonia pyricolana, the codling moth, peach-twig moth, and eye-spotted hud 

 moth. General notes are presented on these six species, their life history and 

 habits are compared in tabular form, and keys to the larvte, pupa?, and adults 

 are given. 



The sec 1 part of the bulletin tpp. 109-113) consists of notes on the life 



history of the oriental peach moth, additional to the information given in the 

 bulletin previously noted (EL S. EL, 39, p. 260). The notes relate to egg laying 

 and early larval habits, pupation habits and methods of passing the winter, life 

 history of the different Stages, and number of broods. There are three full 

 broods and a fourth, the majority of which hibernab . 



The third part (pp. Ill 119) deals with the amount Of injury caused by the 

 oriental peach moth to peaches, apples, pears, and cherries, and includes a 

 table showing the effect of various insecticides on the egg of L. molesta. The 

 injury caused to the apple is in no ea-. as serious as that of the apple bud 

 borer. The injury to pear seems to be of little importance, while the fruit and 

 twig injury to cherry is slight. 



A total »f live bymenopterous parasites and three dipterous parasites have 

 been reared from the oriental peach moth at College Park and in addition two 

 secondary parasites from the pupa of Macrocentrus, namely: Primary hymenop- 

 terous parasites, Trichogramma minuta, \lacrocentrua sp., Aacogtuter carpo- 

 capxir. and an undetermined species of the family Bupftlmlnffi ; secondary 

 bymenopterous parasites. Dibrachys boucheawu and Eurytoma sp.; ami dip- 

 terous parasites, NemoriUa phycitw, Leskiomima tenera, ami Euzenillia varia- 

 bilis. W 1 and Selkregg (B. s. EL, "'.». p. 259) have reared tour additional 



primary parasites, making a total of 12 obtained from the oriental peach moth. 



Observations made since the previous report lend some doubt both as to the 

 advisability of using arsenates because of injury to the trees and because of 

 their doubtful effect in controlling the pest 



Tests of the effect of various insecticides on the eggs of the oriental peach 

 moth are reported in tabular form. The highest percentage was that of black- 

 leaf 40, which at the strength of 1-: 800 destroyed 76 per cent. 



The lotus borer, F. H. Chittenden (Jour. Boon. BrU., 11 (1918), No. 6, pp. 

 458*457, /)!. l). — The author here brings together Information on PyrauMta 

 penitalis, which so closely resembles the European cornstalk borer ( /'. iiuhii- 

 alis) as to be mistaken for it. 



