I'. S. n. A.. Bui. 66. Part VII. Issued .Inly 19, 190y. 



SOME INSFXTS INRIRIOUS TO TRUCK CROPS. 



MISCELLANEOUS NOTES ON TRUCK-CROP INSECTS. 



By F, H. Chittenden, Sc. D.. 

 In Charge of Truck Crop and Stored Product In.tect Investigations. 



SUCCESSFUL USE OF ARSENATE OF LEAD AGAINST THE 

 ASPARAGUS BEETLE. 



During the first week of June, 1908, Mr. AV. A. Orton reported the 

 common asparagus beetle {Crioceris asparagi L.) very injurious at 

 Takoma Park, D. C., and made some experiments with arsenate of 

 lead with complete success. Directions for application, as given in 

 Circular 102 of this Bureau, were followed. The first application was 

 made with 1 pound of arsenate of lead to 20 galhms of water and the 

 second a week later, as the plants had grown rapidly in the mean- 

 time and a great many new larvae had hatched. The second appli- 

 cation was made at the rate of 1 pound to 15 gallons of water. The 

 first application destroyed most of the insects, but after a few days 

 a considerable number had developed. These appeared to have been 

 all killed the day after the second spraying. Xeither spraying seemed 

 to injure the plants in the least, but the liquid adhered in fine drops to 

 the foliage and was visible there for some time. An unsprayed plat 

 on a neighbor's place was considerablv injured by these insects, and up 

 to Jul}' 1 no more had appeared on Mr. Orton's crop. He pronounced 

 the treatment very effective. The work was done with a compressed- 

 air machine or autospray. 



^Ir. Edward A. Eames, Buffalo, N. Y., writing of the value of 

 arsenate of lead as a means of combating the common asparagus 



Note. — The accompanying: Part VII includes short notes on some of the 

 insects which have been treated in earlier parts of this bulletin and notes on 

 two insects not hitherto recorded as injurious in the United States. To the 

 former class belong notes on the asparagus beetles and the asparagus miner, 

 species considered more in detail in Part I, pages 1-10. and notes on water- 

 cress insects in addition to what has been published in Part II. pages 11-20. 

 To the second class belong notes on the injurious occurrence of the pea moth in 

 the United States and a short account of a new western root-maggot. — F. H. C. 



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