JOURNAL 



OF 



ECONOMIC ENTOMOLOGY 



OFFICIAL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 



Vol. 9 APRIL, 1916 No. 2 



Proceedings of the Twenty-eighth Annual Meeting of 

 the American Association of Economic Entomologists. 



(Papers held for publication later or read by title.) 



LACHNOSTERNA RECORDS IN WISCONSIN 



By J. G. Sanders and S. B. Fracker, State Capitol, Madison, Wis. 



By means of a special fund granted by the Wisconsin legislature of 

 1913, experiments were carried out in 1914 and 1915 with regard to 

 the serious white grub pests of the genus Lachnosterna, which have 

 caused heavy losses during recent years. Several factors to be 

 considered included: the determination of conditions; crops most 

 seriously damaged with and without rotation; the species present 

 and their habits, life-history, distribution and means of control. 



It was decided that lantern traps be used as a means of collecting 

 large numbers of the beetles for the purpose of determining the 

 species to be found in the lower portion of the state, their attractive- 

 ness to lights with regard to sex, and the possibility of economic 

 control in this manner. Some interesting information as to the 

 number of species concerned and their relative abundance and dis- 

 tribution was secured. Some of the results are briefly outlined 

 here. 



The forty trap-lights used consisted of the Coleman gasoline arc 

 lantern (Fig. 10), furnishing 300 to 400 candle power, set into large, 

 galvanized refrigerator pans, five inches deep and about twenty-four 

 inches in diameter. These pans were filled about two-thirds full of 

 water, and one-half pint of kerosene was poured on the water and 

 renewed when necessary. Perforated skimmers were used to remove 

 the captured insects. 



