REPORT OF THE SOCIETY 



107 



Grasshoppers or Locusts. 



These are well known insects, and occasionally do much damage. The 

 chief injurious species are the Rocky Mountain Locust and the Lesser 

 Migratory Locust in the West, the Lesser Migratory Locust, the Clear 

 Winged Locust, the Differential Locust, and the Red-legged grasshopper 

 in the East. The eggs are laid in pod-like masses, usually in uncultivated 

 ground; the young appear in the spring and mature in July, August and 

 September. Grasshoppers are destroyed in large numbers by fungous 

 disease, by mites, by parasitic flies, by the grubs of blister-beetles, and 

 by birds. 



\\heat plant-louse {Nectarophora cerealis); a, winged migrant; 6, nymph of winged migrant; c, wingless par- 

 th>-nogenetic female; d, wingless female, showing exit hole of parasite — all enlarged (adapted from Riley). 



Grasshoppers may be controlled (a) by scattering broadcast thinly over 

 infested fields in early morning a poisoned bran bait composed as follows: 

 bran, 20 lbs. ; Paris green or white arsenic, 1 lb. ; molasses, 2 qts. ; oranges or 

 lemons, 3 fruits; water, 3 1-2 gals. The bran and Paris green, or white 

 arsenic, are mixed thoroughly dry; the juices of the oranges or lemons are 

 squeezed into the water and the pulp and peel, cut into bits, added; the 

 molasses is then added, and the liquid poured on to the poisoned bran which 

 is then thoroughly stirred. The amount given above is sufficient for five 

 acres. Excellent results will follow after two to four days, (b) By fall 

 plowing of sod land. 



Plant Lice. 



Several species of plant-lice are to be found on cereal crops. They 

 collect on the leaves and heads and suck the juices from the plant, causing 



