1918] ECONOMIC ZOOLOGY ENTOMOLOGY. 861 



the successful results obtained by De Sellera at North Yakima, Wiish., in the 

 control of the codling moth through the use of nicotin sulphate (E. S.' R., 38, 

 p. 653). See also abstract noted on page 857. Experiments conducted by the 

 author and briefly reported upon show that nicotin sulphate is an effective 

 ovicide for codling moth eggs and that the addition of soap renders it practi- 

 cally perfect in this regard. 



Some esperiments on the adults and egg-s of the peach tree borer, Sanni- 

 noidea exitiosa, and other notes, A. Peterson {Jour. Econ. Ent., 11 {1918), No. 

 1, pp. 46-55, figs. 2).— This is a report of studies at the New Jersey Experi- 

 ment Stations, particularly of control measures, made during the summer of 

 1917, near Clementon, N. J., in a heavily infested SO-acre orchard of seven- to 

 eight-year old peach trees of different varieties. 



Data relating to the repellent effect of various sprays during oviposition, 

 the effect of sprays on eggs, etc., are reported in tabular form. The results 

 obtained indicate the improbability of developing a poison bait for the adult, 

 the partial repellent effect of certain chemicals on the female while ovipositing, 

 and the partial destruction of eggs when certain substances are applied as a 

 spray. While experiments under way on the use of various chemical and 

 mechanical tree protectors do not as yet warrant a statement, the author is of 

 the opinion that the peach borer trouble will be solved through the finding of 

 some mechanical or chemical barrier that will prevent its gaining entrance or 

 will kill tlie larva before it enters the tree. 



The striped peach worm, H. G. Ingekson {U. S. Dcpt. Agr. Bui. 599 {1918), 

 pp. 14, pis. 4)- — This is a report of biological and control investigations of 

 Gelechia confusella {Deprcssaria persicceella) conducted during 1915 and 1916 

 in Michigan at Benton Harbor, the only State in which the species is known 

 to occur. 



This lepidopteran, first described by Chambers in 1875 from an unknown 

 locality, has received but little notice as an economic species. While not at 

 present a major pest of peach, it has been observed feeding on sand cherry 

 {Prunus pumila), its only other plant host, in such numbers as to web nearly 

 every terminal and partially defoliate it, thus indicating a possibility of exten- 

 sive injury to peach orchards. The larvae feed either singly or gregariously 

 on both host plants and though not voracious feeders include in their webs 

 much foliage that is not used as food. Their webbing commences directly after 

 hatching, even before they feed, which takes place next to the midribs of the 

 leaves, small irregular holes first being eaten through the parenchyma and later 

 either or both leaf surfaces being skeletonized. The injury to the peach is 

 caused by the feeding of the larvae on the foliage. The webs which they spin 

 are loose and often very conspicuous, but tlie leaves included in the webs soon 

 become dry and cease to function. 



At Benton Harbor there was one full brood and a partial second, the earliest 

 emergence of moths in 1916 taking place May 22, and emergence being quite 

 regular from June 5 to July 14. Moths placed in jars with peach foliage and 

 fruit deposited eggs both on the fruit and under the scales surrounding the 

 attachment of the peach to the stem. In observations of 118 eggs the period 

 of incubation varied from 10 to 19 days, with an average of 13.18 days. The 

 feeding period of the transforming first brood larvae reared in cages varied 

 from 22 to 36 days, with an average of 29.6 days for transformation ; of winter- 

 ing first brood larvae, 22 to 48 days, with an average of 34.2 days. The co- 

 coons of the first brood are formed in the soil at an average depth of 0.5 in. 

 The average length of the period in the cocoon was 12.4 days, the longest period 

 21 days, and the shortest 9 days. The first brood moths were emerging in 1915, 



