10 



of glucose, or if that substance cannot be obtained, two quarts of 

 molasses, are added to each 150 gallons of water. The spraying 

 should preferably be done when the caterpillars are young, before 

 the end of May. A second spraying is often necessary in case of 

 heavy rains or if the trees are very badly infested. For trees with 

 tender foliage, as the peach and plum, the proportion of Paris green 

 or of London purple should not be greater than one pound to 250 

 gallons of water. 



THE ARMY WORM. 



Leucania unipuncta (Haw.). 



During the past year two outbreaks of this old-time pest were 

 reported in this State, one in Franklin County and the other on Cape 

 Cod. The numbers; of the Army Worm in any one year depend 

 largely upon certain climatic conditions, which, happily, are seldom 

 fulfilled. Whether or not the conditions have been sufficiently ful- 

 filled to ensure a general outbreak this year is doubtful, but lest they 

 may have been, the following account of the habits of the caterpillar 

 and of the means best adapted to prevent or check its ravages is 

 given in order that the farmers of the State may not be altogether 

 unprepared. 



The normal feeding grouilds of the Army Worm are in swamps or 

 low meadows where it subsists upon the various kinds of grasses and 

 sedges. Here with habits very similar to those of the common cut- 

 worms, to which it is allied, it escapes the common notice. But 

 when the caterpillars become exceedingly numerous and their food 

 supply is insufficient for their needs, they develop the trait which has 

 suggested their common name, that of marching in armies. Then 

 they appear as if by magic, marching in straight lines across the 

 neighboring lands, stripping the fields clean of everything agreeable 

 to them, and often doing immense damage by cutting off plants not 



