THE ARMY WORM IX CRANBERRY BOOS 15 



following remedy against this pe.st : In company with another person he drags a long 

 rope across the bog, thus driving away many of the locusts, <»r at least disturbing 

 them. He says that if this operation were repeated about twice each day the dai 

 would he considerably reduced, as the disturbed Locusts do not settle down again to 

 their destructive work until after the lapse of several hour-. 



No "berry moth" could be observed on Mr. Rockwood's cranberry farm, but eon- 

 8 iderable damage had been done earlier in the season by another Tortricid larva, 

 which webs together the terminal leaves of the young vines. At the time of my visit 

 not a single living specimen could be found, but I believe that an additional flooding 

 of the bogs would prove a good remedy for this | 

 Respectfullv. 



E. A. SCHWARZ, 



Assistant. 

 Prof. C. V. Riley. 



U. S. Entomologist. 



A careful examination of the more or less irrecognizable specimens 

 found by Mr. Schwarz left little doubt in our minds that the species 

 was the genuine Army Worm, a few of the heads making this decision 

 possible. 



It is evident from the facts observed by Mr, Schwarz that the moth 

 had flown from some distance, for the records for that year, as indicated 

 in our last report, show that the insect was quite prevalent throughout 

 that portion of the United States at the time. 



Remedies. — It follows from the facts obtained that one of the .best 

 ways of preventing injury to cranberries in the future is to keep the bog 

 as free as possible from foreign plants, and that the injury may be limited 

 by increasing the number of irrigating ditches and by keeping these free 

 from Aveeds and other obstructions. 



Another method to prevent the recurrence of such invasion of the 

 Army AVorin suggest itself: The water is drawn off from the bog 

 on May 10. and the plants not flooded again for the rest of the season. 

 The irrigating ditches are then only kept tilled with water in given quan- 

 tities, according to the character of the season. Now, the water can be 

 drawn off earlier than has hitherto been done, without injury to the 

 plants, and. what is more important in this connection, the water can 

 be let on again without injury to the plants at any time before bloom- 

 ing, I. e., about the last week of June. If the eggs are laid by the moths, 

 as was evidently the case in 1882, during the month of May. it is ap- 

 parent that a flooding of the bog some time during the month of June 

 (the water to be kept on the bog. say. for about two days would drown 

 out the worms before they have begun to do the damage. 



Wherever an abundant water supply is at command in spring and 

 early summer, and under control, as is the ease on the cranberry farms 

 near Hammonton, a repetition of the damage done by the Army Worm 

 could thus easily be avoided. Should the worm appear during or after 

 the blooming season little or nothing could be don.- against it : but it is 

 probable that at this time the damage done by the worms would be much 

 less serious than earlier in the season, as the leaves on the bearing vines 

 will then be too hard to be very attractive. 



