]Determination of Chloroform Extract of Beet Leafhopper A Micromethod ROBERT A. FULTON Bureau of Entomology and Plant Quarantine, U. S. Department of Agriculture, Columbue, Ohio
I
ties (above 50 per cent at 23.89’ C.,75’ F.) interfere with the determination because of the hygroscopic nature of the insect material. Low humidities that are usually found in the desert regions are ideal for the performance of the method.
N CONNIECTION with certain nutritional studies of the beet leafhopper, Eutettil: tenellus (Baker), it was desired to
determine the chloroform-soluble components, or extractives, of the insect as an aid in judging the amount and nature of
TABLEI. CHLOROFORM EXTRACTIVES O F BEET LEAFHOPPERS COLLECTED IDAHO, 1931 Date
Looality
Host Plant
May 20 May 20 July 8 July 14 July 14 July 14 July 14 October 8
Mountain Home Elmore County Glenns Ferry E
