8 SOME INSECTS INJURIOUS TO TRUCK CROPS. 



the Oakley occurrence was the first that Mr. Smith had noted since. 

 In most of the asparagus acreage of the State the insect was not 3'et 

 present. 



Mr. Franklin Sherman, jr., has kept a careful record of the occur- 

 rence of this species in North Carolina, and informed the writer, on 

 the occasion of a visit in 1906, that it is common in the east-central 

 part of the State in the trucking belt, and especiall}' abundant at 

 Raleigh, Wake Count}'', Goldsboro, Wayne County, and Warsaw, 

 Duplin County. 



In order to make the present account of the known distribution of 

 this species as complete as possible, inquiry was made of the official 

 entomologists of the States of Kentucky, Iowa, Missouri, Nebraska, 

 and Minnesota, all of whom reported that the occurrence of this spe- 

 cies in their States had not been brought to their attention. Mr. James 

 G. Moore, however, assistant in horticulture at the University of Wis- 

 consin, Madison, Wis., stated that the asparagus beetle had been found 

 in Wisconsin, but he had no special data on its distribution. 



REMEDIES. 



With regard to remedies good results have followed the experimental 

 use of arsenate of lead. This insecticide has come into very general 

 favor in recent years, and in the correspondence of this office we have 

 for some time advised its emplojanent against most leaf -feeding beetles, 

 like the asparagus beetles. In Connecticut Dr. W . E. Britton " has made 

 a practical test of this remedy on asparagus plants, spraj^ing them from 

 all four sides in succession because of the slight leaf exposure as com- 

 pared with most other plants. The day following treatment (June 4) 

 many dead beetles and larvte were found on and under the plants. A 

 few had survived and were feeding, but ten days later only a few 

 living larvw could be found, and the beetles did not again become 

 abundant on the plants during the sunmier. The same amount of 

 good might be accomplished with scarcel}^ greater expense by spray- 

 ing from opposite sides and repeating just before the time for the last 

 generation to develop and in time to check the beetles before the}' go 

 into winter quarters. 



In Pennsylvania Prof. H. A. Surface,'' in a series of experiments 

 with Paris green and arsenate of lead, applied to asparagus plants the 

 first week of June, 1905, found that not more than .50 per cent of the 

 insects were killed when Paris green and lime were used. With lead 

 arsenate 90 per cent were killed, while in one experiment, by the addi- 

 tion of resin soap, which is used as an addition to an insecticide to 



«Rept. Conn. Agric. Exp. Sta. f. 1908 (1904), pp. 275, 276. 



^^ Monthly Bulletin, Div. of ZooL, Pa. State Dept. Agric, Vol. IV, May, 1906, p. 8. 



