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Unwanted honeybee colonies were eradicated slowly by 20 percent 
DDT (Gesarol A-20) ♦ Three percent DDT was ineffective when it was blown 
into oolony entrances*— TTolfenbarger et al. (379 ) • 
To avoid killing bees, open blossoms should not be sprayed with 
Gesarol, although its contact action against tees is less than against 
flies, beetles, and other pests.— Kobel (259) . 
Bees were abundant in an alfalfa field treated with a 3-percent 
DDT dust at the rate of approximately 28 pounds per acre and were not 
perceptibly injured.— Mi chelbaoher et al. (257) . 
Careful examination of the gound under hairy vetch at Oregon City, 
Oreg., disclosed that 5-percent DDT dust had killed insects of several 
species. Ho dead bees were found and no decrease was noted in the 
number of honeybees that were swept from hairy vetch dusted with DDT. 
— Rockwood and Reeher (303) • 
Individual honeybees placed on sheets of paper dusted with 1 per- 
cent of DDT in kaolin and covered with a beaker were totally paralyzed 
in 19 minutes and killed in 110 to 130 minutes.— Sen (311). 
It is not yet known just how serious a menace DDT spray residues 
on fruit trees and cover crops in orchards will be to honeybees, but 
experiments during 1944 showed that, although the bees were readily 
killed when confined in cages with sprayed material, the effect of 
visiting sprayed blossoms in the field may not be so serious as at first 
feared.— Ross (306) • 
DDT was applied to raspberries while in full bloom. Bees that 
worked the sprayed flowers were caged and compared with those taken far 
away from the area. The bees from ifoe sprayed areas appeared to live 
just as long as those from the unsprayed sections. In other experi- 
ments DDT was toxic to bees confined in quarters sprayed with the in- 
sect! oide»— Burtner (98). 
See Unidentified thrips.— Anon. (49). 
Formicidae 
Atta cephalotes (!••)» the couahi ant 
In a laboratory experiment in British Guiana 7 specimens of the 
soldier caste of Atta cephalotes were placed in a glass container the 
floor of which had been dusted with DDT. Alongside them was placed 
a suitable control experiment consisting of soldier ants from the same 
nest. Two hours later all the ants in contact with the insecticide were 
obviously affected, the usual tremulous movements in the limbs and their 
lack of coordination in locomotion being evident; 6 hours later the 
