860 EXPEBIME-NT STATION EECORD. [Vol.38 



The use of phototaxy iu selecting from the moment of their birth those 

 larvae of Bombsrx mori most resistant to the disease flacherie, C. Acqua 

 (Abs. in Internat. Inst. Agr. [Rome'[, Internat. Rev. Sci. and Pract. Agr., 8 

 (1917), No. 6, pp. 910-912). — During investigations carried out to determine 

 tlie action of liglit on tlie movements of B. mori the autlior found tliat the 

 newly-hatched larvse immediately turn to the source of light and that this 

 movement diminishes during the following days and disappears entirely at 

 the end of the first stage. During the subsequent stages there is an inverse 

 but less energetic movement and the larvse tend to avoid the light. The larvae 

 which were most resistant to flacherie were those which from the time of 

 their birth had traveled farthest 



Gipsy moth larvse as ag'ents in the dissemination of the white-pine blister 

 rust, G. F. Gravatt and G. B. Posey {U. S. Dept. Agr., Jour. Agr. Research, 

 12 {1918), No. 7, pp. 4^9-462). — The investigations here reported, which were 

 conducted in 1917 at Kittery Point, Me., with the view of determining the 

 relation of gipsy moth larvse to the dissemination of the spores of the causal 

 organism of white-pine blister rust {Cronartium ribicola), have been sum- 

 marized as follows : 



" The period of hatching and of wind dissemination of gipsy moth larvse 

 came within the period of spore production of the blister rust on pines. Larvse 

 fed abundantly on spores and injured the fruiting layer of the pustules so 

 that further spore production was arrested. Darvse from blister rust cankers 

 .had thousands of viable spores on their bodies. A small percentage of the 

 larvse collected from fly paper and from species of Ribes near infected pines 

 showed seciospores on their bodies. Gipsy moth larvse were found feeding on 

 leaves of Ribes spp., and in some cases the only infected leaves on plants of 

 this genus were tho.se showing insect injury. The Bureau of Entomology has 

 shown (E. S. R., 37, p. 254) tliat these larvse are blown by the wind up to a dis- 

 tance of 20 miles. Within this distance the larvse are potential agents in the 

 spread of the white-pine blister rust (within the area infested by the gipsy 

 moth)." 



The apple ermine moth, P. J. Parrott (Jour. Econ. Ent., 11 (1918), No. 1, 

 pp. 55, 56). — In an earlier report from the New York State Experiment Station 

 (E. S. R., 23, p. G57) the author dealt with the cherry ermine moth (Ypono- 

 meuta padellus) which was imported on cherry seedlings. An associated 

 species, the apple ermine moth (Y. mfilinella), has since been observed in New 

 York on apple, and in the present paper notes on its identity and distribution 

 in nurseries are presented. Since 1910 It has been discovered each year In 

 plantings of foreign stock in New York, but has not been reported from outside 

 the State, except in New Brunswipk. Whether the two forms represent dis- 

 tinct species or are only varieties of the same ^peeies remains to be determined. 



The imported cabbag-e worm in Wisconsin, H. F. Wilson and L. G. Gent- 

 nee (Jour. Econ. Ent., 11 (1918), No. 1, pp. 79-81, pis. 2).—" While Paris green 

 gives efiicient control the cost is too high for eoonomical use. Lead arseuat-e 

 and calcium arsenate at the rate of 1 lb. of the powder or 2 lbs. of the pa.ste to 

 50 gal., with the addition of 1 lb. or more of common laundry soap, give effi- 

 cient control and are the most economical to use. The failure of zinc arsenite 

 to control the cabbage worm is not understood and further experiments will 

 be made. No trace of arsenic was found to be present on sprayed heads pre- 

 pared for cooking even when sprayed as late as a week before picking. The 

 outer leaves may carry enough arsenic to poison stock and are therefore dan- 

 gerous to use for that purpose." 



Nicotin sulphate an effective ovicide for codling moth eggs, A. L. Lovett 

 {Jour. Econ. Ent^ 11 (1918), No. 1, pp. 149, 150).— The author first refers to 



