720 



Leucania unipuncta; brief breeding-cage notes on the food babits of 

 cut-worms; a statement of the results of experiments with various 

 insecticides for the striped cucumber beetle {Diabrotica vittata); note 

 on the potato stalk- weevil (Trichobaris trinotata)', and a statement of 

 the results of experiments with a kerosene extract of pyrethruin as an 

 nsecticide. 



For the cabbage- worm, hellebore did not prove effective ; " peroxide of 

 silicates" was fairly destructive; but the most effectual remedy was a 

 dry mixture of Paris green and flour (1 ounce of Paris green to 100 

 ounces of flour). An experiment reported in the bulletin indicated that 

 there is very little danger of poisoning from cabbages treated with Paris 

 green. 



For the striped cucumber beetle, dry pyrethrum, jiyrethrum tea, cop- 

 peras, carbolic acid, and gas lime were ineffective; nitrate of soda, 

 kerosene, and hellebore repelled the insects for a time ; a mixture of 

 Paris green and flour gave fairly good results ; fresh wood ashes dusted 

 on the plants after the dew had begun to fall at night proved the most 

 eflectual remedy. Open boxes were of no use in fencing out the beetles 

 though the same boxes covered with mosquito netting or cheese cloth 

 are an effectual i)reventive for the cabbage-worm. 



The potato stalk-weevil was observed in abundance in the winter of 

 1890 in the stems of two species of Phy salts (ground-cherry) in the 

 vicinity of the station. 



In the summer of 1888 the author first made use of a combination of 

 kerosene emulsion and x^jrethrum as an insecticide for chinch-bugs. 

 He has since successfully used this preparation for false chinch-bugs 

 {Nysius angustatus), cabbage-worms, red spiders, and plant-lice. His 

 first published reference to the matter was in Bulletin No. 5 of the 

 station, May, 1889, p. 184, where he briefly states that a preparation 

 made by diluting kerosene emulsion with pyrethrum tea was used by 

 him for the red spider {Tetranychus telarius). An account of experi- 

 ments at the Arkansas Station with a similar preparation for the cotton 

 boll- worm {Heliothis armigera) was published in Bulletin Ko. 15 of that 

 station (See Experiment Station Record, Vol. II, p. 318). 



Feeding experiment, R. P. Speer (pp. 550-552). — The author 

 states that when large quantities of corn meal are fed to fattening 

 cattle "much of it passes through them undigested." He suggests that 

 cattle could be made to remasticate a large share of it "by mixing meal 

 with cut hay or straw." To test the advisability of this, six calves, 

 from 9 to 10 mouths old, were fed from February 8 to March 31, 20 

 pounds of corn-andcob meal per day, and timothy hay ad libitum, the 

 meal being fed dry to one half the calves about an hour and a half 

 before the hay, and to the other half moistened and mixed with the 

 cut hay. 



The weights and gains of the animals are tabulated. The three 

 receiving the hay separately gained 227.5 pounds during the trial, and 



