- See 
EGGPLANT TORTOISE BEETLE. i 
TABLE TIl.—-Results of arsenical sprays against the eggplant tortorse beetle. 
Number of Number of | Number of 
larvee larvee 
larve on z 
Treatment. 25 plants pinta miants 
2 pee days after | davs after 
ers IRe. spraying. | spraying. 
Sprayed with arsenate of lead, powdered, at rate of 1 pound to 50 gal- 
[GANS OREM ine SS ee oe FORO Ree Ae oo Eee Ee sabogeueesodeee 85 14 2 
Sprayed with arsenite of zinc, powdered, at rate of 1 pound to 50 gal- 
ATISRO TAA TCT, en eee eer tec eters cee cena ate teats cae Su Re 93 12 2 
_ During this time there was no apparent decrease in the number of 
Serve: on unsprayed plants. It is apparent that the larvee can be 
| controlled satisfactorily by the use of an arsenical which might, at 
‘the same time, serve to lessen the injury caused by other leaf-eating 
finsects. In transplanting eggplant in sections where this tortoise 
| beetle is abundant it would be advisable to dip them in some spray 
mixture to prevent injury. 
SUMMARY. 
| During 1915 a tortoise beetle (Cassida pallidula Boh.) was found 
injuring eggplant and Irish potato at Baton Rouge, La. 
This species has hitherto been recorded as feeding on eggplant 
“and various wild Solanums.' It is somewhat widely distributed over 
the southern United States. 
The various stages have been described from life-history studies 
| carried on at Baton Rouge. ! 
Three females reared in the insectary deposited, respectively, 268, 
269, and 231 eggs, one laying as many as 12 in one day, and another 
averaging 7 eggs a day. 
The minimum life cycle in the insectary was found to be 27 days. 
| Under ideal conditions it is possible that five generations may develop 
| in the field at Baton Rouge during the spring, summer, and fall. 
Only one enemy, an undetermined egg parasite, has been noted. 
An experiment with arsenate of lead and arsenite of zinc indicates 
that the species can be controlled satisfactorily by the use of 
arsenicals. 
js 
1 Numerous observations have been made of this species and its occurrence on solanaceous plants, many 
of which have not been recorded. In 1903, June 12, it was observed at Riverview, Md., on wild Solanum. 
May 4, 1903, it was observed by Mr. J. C. Bridweil at Willis, Tex., on Solanum carolinense. He also 
observed this species on the same plant in Kansas]in earlier years. May 8, 1908, and March 31, 1909, Messrs. 
MeMillan and Marsh observed this species on Solanum elaecagnifoliwm. February 6, 1912, Mr. M. Beatty 
observed this species on potato and eggplant at New Orleans, La. During June, 1915, the species was 
Observed on eggplant by Mr. F. B. Millien, at Wichita, Kans. We have received specimens from 
Kansas City, Mo., and from Agricultural College, Miss., the latter collected by Mr. J. W. Bailey, on egg- 
plant.—r. H. CHITTENDEN. Ps 
