16 BULLETIN" 554, U. S. DEPARTMENT OF AGRICULTURE. 



ing the latter part of September. If the bog is vined with a variety 

 of early berries it will not be difficult to have them picked early so 

 that flooding can be done at the proper time. With late berries, such 

 as Howes, this treatment is not in vogue and some other remedy must 

 be attempted. It is of course essential to have sufficient water in 

 storage to accomplish the fall flooding, and a lack of storage water 

 at this season of the year is the stumbling block which limits the 

 practice of fall flooding to a very few of the New Jersey bogs. 



If the fall flowage is applied later than the first week in October 

 most of the worms will not be killed, as is shown in the following 

 notes made on a bog at Mays Landing, N. J.: On October 15 the 

 bog was examined and was found to have been severely damaged. 

 A search for larvae and cocoons was made, and 30 larvae in cocoons 

 and one naked larva were secured. The flowage was put on October 

 22 and held until November 8, a period of 17 days. On November 



17 another examination was made, and 26 live larvae and 1 dead 

 larva in cocoons were collected. This treatment was therefore en- 

 tirely unsatisfactory. 



At Pemberton, N. J., a newly infested bog was flooded from Sep- 

 tember 19 to October 3, a period of 14 days, with the result that the 

 following season no further dying of the vines occurred and no flight 

 of moths was observed. This indicated very successful control. 



Fall flooding immediately after picking the crop, whether this be 

 early or late, is a treatment to be commended, even though girdlers 

 are not present, since it helps in the control of the yellow- 

 headed fireworm (Peronea minuta Rob.), the red-striped fireworm 

 {Gelechia triaTbamaculella Cham.), the toad bug (Phyllos cells atra 

 Germ.), the blossom worm (Epiglaea aplata Grote), and other in- 

 sects of minor importance. 



SPRING FLOODING. 



Wherever opportunity offered, examinations were made of bogs 

 after the reflowage had been removed in the spring, to determine if 

 flooding during the pupa stage for various lengths of time had 

 killed the pupae. In the season of 1915 a bog from which the winter 

 flowage had been drawn on May 10 was reflowed June 9, and a cer- 

 tain area, known to be infested, was watched to ascertain the number 

 of hours it was covered by the flowage. This period proved to be 

 24 hours, and soon afterward two cocoons, each of which contained 

 a live pupa, were found upon the bog. Moths issued from these 

 pupae on June 15 and June 19. From another area on the same 

 bog, which had been submerged about 30 hours, 11 cocoons were 

 collected, and these yielded 10 pupae. Moths issued from these pupae 

 as follows: June 14, three; June 15, two; June 16, one; June 17, 

 three. 



