REPORT OP COMMITTEE ON PUBLICATION 201 



The use of sticky shields to capture the adults has not proven as 

 practical in eastern vineyards as the several methods of control just 

 described. 



This paper was followed by a discussion, lead by President Alwood, 

 on remedial and preventative measures regarding the grape leaf-hopper, 

 Mr. W. T. Stevenson, of Elk Grove, Cal., and Mr. Frank T. Swett, of Mar- 

 tinez, gave their experiences with the use of atomic sulphur. 



Mr. R. H. Roberts, Agricultural Expert with the Santa Fe System. "I 

 use a nicotine mixture together with atomic sulphur in the control of the 

 nymphs. There are very few vine hoppers in the San Joaquin Valley 

 this year. When the nymphs are young, atomic sulphur alone is sufficient 

 to control, and later on nicotine and water, together with whale oil soap as 

 a spreader, will give control. The nicotine will give you a 90 per cent kill. 

 The cost per acre runs from $2.50 to $4.00, including all labor, supplies and 

 material. 



Prof. Bioletti. "Do you advocate the use of sulphur without the nico- 

 tine?" 



Mr. Roberts. "Yes; because it stays on the vine. Used strongly it will 

 give about a 50 per cent kill. It will kill the very youngest nymphs, but the 

 nicotine is the real control." 



Mr. Gray. "The atomic sulphur is used preeminently as a control for 

 the mildew, and used with nicotine they mix very well the sulphur for 

 the control of the mildew and the nicotine for the control of the leaf- 

 hopper. When nicotine is used alone with water it is not very effective, 

 but when used with something else, as, for instance, whale oil soap as a 

 spreader, it will stick to the leaf." 



Mr. Swett to Mr. Roberts. "What form of nicotine do you find best?" 



Mr. Roberts. "Sulphate of nicotine, and a spreader of soap is most 

 important to the Emperor vine." 



THE GRAPEVINE FLEA-BEETLE. 

 (Haltica chalybea Illiger.) 



By F. Z. HARTZELL, 

 Vineyard Laboratory, Fredonia, New York. 



The first destructive insect to make its appearance in the vineyards of 

 the eastern United States, with first warm days of spring, is a small active 

 beetle of a shining blue color. This coloration has caused it to be given 

 another name steely beetle. In common with other beetles which have 

 the power of leaping great distances it has been called flea-beetle and from 

 its chief food plant it receives its common name of grapevine flea-beetle. 

 In certain localities it bears the additional appelations: steel beetle and 

 steel-blue beetle. 



