Show cube root rooe fatal fa lal to cattle cartle grubs entomologists successful in its use to control the pest prepared by the th united bistes state department of whoever would think of trying to solve a problem in entomology by applying cube root I 1 As a matter of tact that lint Is exactly what federal did try ary and with gratify gratifying Ink success the cube root however tins litis no relation to the mathematical process familiar to high school students even the pronunciation Is different nod and cube Is divided into two syllables coo bay and the root Is the r root 00 t of a south american plant which Is now considered a highly promising source of insect poisons the poisonous principle in the cube plant is rotenone the same poison that abut Is more familiar to in derris powder best control methods in trying to discover the best methods tor for controlling the grub that infests cattle and causes knobby bunches to form in their barks backs federal ento experimented with several powders they sprinkled these powders on the backs of infested cattle and observed the effect on the grubs other poisons used included powdered derris root hydrated hd rated time lime nicotine sulphate and tobacco powder arli of which were reasonably effective in rid ding the cattle of the grubs gruba the hy by lime was too caustic for the th e skin of the cattle the derris and cube root powders had no unfavorable effect on the skin ond and hair of the un an emals and these materials are not par poisonous onous and hence are very safe to use applications of these powders at IS 15 duy day intervals killed most of the grubs two to four treatments were required control heavy losses the federal scientists have been noxious to discover some come method of controlling the heavy annual losses from cattle grubs which will be less tedious and disagreeable than han t the customary method metho dof lot squeezing the gru grubs b I 1 until they pop out of the back of the th e infested animal the dusting methods give a high degree of control and would be particularly effective it if the whole community could be induced to do the dusting simultaneously tor for two or three seasons |