EXPERIMENT STATION BULLETINS. 



139 



This interesting insect passes the long period of seventeen years 

 under ground, in preparation for a week or so in the upper air. During 

 its long period underground, its name and habits are almost forgotten, 

 and when it appears at last, its story is as good as new, and its coming is 

 dreaded in the belief that it will prove an enemy. The only damage 

 that is done occurs when the eggs are laid. These are placed in holes 

 bored in the twigs of trees, and sometimes twigs are killed in this way. 

 Ordinarily, however, the damage amounts to nothing, unless it happens 

 to be done in a very young orchard, just set out, in fact. As the insect 

 occurs only in isolated stations in Michigan, and seems, on the whole, 

 to be dying out, it may almost be ignored as an enemy. 



THE ANGOUMOIS GRAIN-MOTH. 



• "1 



An enemy of prime importance, for the first time recorded in Mich- 

 igan during the present season, is the Angoumois Grain-moth. An 

 insect which is regarded as the most serious pest of stored grain in the 



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<iSnsi. !■ 1 ' 



Fig. 4.— Angoumois grain-moth, from F. H. Chittenden, U. S. Department of Agriculture, Farmer's 



Bulletin, No. 4.5. 



South and which bids fair to become of prime importance with us. The 

 pest came to this country nearly two hundred years ago from France 

 and has steadily worked its way north from Carolina, where it first 

 made its entry. 



This delicate little marauder is about the size of a clothes-moth, 

 almost white or buff, marked with dark brown or even black. The 

 wings are narrow and measure about half an inch or less from tip to 

 tip when extended. It works both in the field and in the granary, eat- 

 ing out the inside of the berry and leaving the outside intact. It 

 works on almost all the grains. The eggs are laid in the field for the 

 first brood, that works in the granary, thus leaving the farmer in doubt 

 as to the source of the trouble. 



The remedy is to mass the wheat in the tight bins or sacks, and when 

 necessary to fumigate with carbon bisulphide. Directions for fumi- 

 gating will be furnished on application. 



The Bulletin also contains short accounts of injury caused by the 

 banded purple butterfly and by the hickory bark-beetle. 



