8 



I he bait for every four square feet of space or 0.5 square meter; 

 if set sparsely place a small pile of the bait near the base of 

 li plant. Care should be taken not to bring the bait in 

 contanct with tender plants on account of the injury from 

 burning that would result. 



In all probability the most extensive test ever given poison 

 bait was executed under the direetion of Mr. W. W. Froggat, 

 Goverment Entomologist of N. S. Wales, Australia. In this 

 experiment 1070 acres of barley were protected from a plague of 

 climbing cut worms, Leucania unipuncta Haw. The worms ap- 

 peared in great numbers and were eating off the heads of the 

 barley. The bait was prepared after the following formula and 

 was distributed by men on horseback. 



English Metric. 



Bran 16 lbs. or 7.2 kilos. 



París green 1 Ib. or 454 grams. 



Salty water to moisten. 



The crop yielded 32,000 bushels. The owner estimated 

 that if he liad not acted promptly his ioss would have been at 

 least three fourths of the crop; as it was he lost only three or 

 four bushels per acre. The total cost of the treatment was 

 $425.00, more than covered by the saving of one bushel per 

 acre. 



POISON BAIT.— TREATED HERB AGE. — Where it is 

 not convénient to use the corn meal or bran as a carrier for the 

 poison a substitution of grass or leaves is sometimes made. The 

 poison is mixed with a small amout of water and sprinkled upon 

 the green material. The bait is then distributed in the manner as 

 described previously. AYhere it is possible to obtain the bran 

 or corn meal, either is preferable to the herbage. 



CRIDDLE MIXTURE.— Where grasshoppers are abun- 

 dan! the following bait may be scattered through the field or 

 grove. 



