AGRICULTURAL EXPERIMENT 8TAT10N. 119 



foliage if it is not killed. The leaves are the food formers for the 

 plant. They elaborate the food necessary to make the new wood 

 and perfect the fruit, also it is their office to store, in the new 

 wood and buds, the material necessary to form the leaves the next 

 season. It is important to clear the trees of leaf -eating insects 

 as early in the season as possible. 



The reader will find an account of the habits of this insect in 

 Expt. Sta. Eepts. 1888, p. 166, and 1890, p. 137. 



There is an insect closely related to the Fall Canker-worm 

 known as the Spring Canker worm. It differs principally in 

 spending the winter in the ground, emerging very early in the 

 spring and laying its eggs which soon hatch. The Fall Cankei'- 

 worm changes to the moth state in the fall when the eggs are laid 

 and do not hatch until spring. We have not noticed the Spring 

 Canker-worm to any extent in Maine. We have at present to do 

 with the more abundant one. 



The females of both species are wingless, and as both feed on 

 the foliage, spraying would be equally remedial for both. For the 

 spring species bands would have to be applied in the spring. The 

 bands on the trees in the spring would prevent the young cater- 

 pillars of both species climbing the trees. 



The Boll-vtorm or Corn-v^orm. 



Heliothis armiger, Hiibn. 



(Ord. Lepidoptera : Family Noctu id se). 



Last September we received a package of sweet corn from 

 Mr. John M. S. Hunter of Farmington, Me., and the following 

 communication : 



Chronicle Office, ) 



Farmington, Me., Sept. 10, 1892. ] 

 Sir : — I send you by express to-day a box containing ears of 

 sweet corn. A gentleman in this village planted the corn (sweet 

 corn) in his garden. He tells me every hill is affected and corn 

 in same condition as that which I send you. Will you please look 

 it up and tell the readers of my paper what these worms are and 

 how to exterminate them. This is a great sweet corn region and 

 farmers fear these worms will give them trouble. 



John M. S. Hunter, Editor. 



