CRANBERRY INSECT PROBLEMS. 



The larva is a dark green worm Avith shininsr black head and neck' 

 and measures about one-half inch in length. From the time of hatch- 

 ing, as indicated above, until growth is completed, about 18 or more 

 days are required in the case of the first brood; the time required for 

 the second-brood worms averages between 14 and 15 days. If the 

 winter jflowage is removed May 10, full-grown Avorms may be found 

 the latter part of the month, although the majority will not reach full 

 size until earlv June. 



■ When the time for changing into the chrysalis arrives the habit of 

 the worm varies somewhat in the cranberry districts. In the Eastern 

 States the pupa will be found on the ground among fallen leaves or 

 trash, usually naked, but sometimes in a lightly constructed web of 

 silk woven on the surface of a fallen leaf. In Wisconsin the pupa 

 is more often found in the webbed tips of uprights. The pupa is 

 of various shades of brown, becoming nearly black just before the 

 emergence of the moth. The pupa period of the first brood averages 

 about 13 days, and in the second brood it is shortened to an average 

 of 10 days. 



THE ^rOTH. 



The adult (fig. 4) is very small, measuring not more than one- 

 half inch across the expanded wings, and is grayish brown^ The 

 forewings are marked with alternate light and dark, bands of 

 gray-brown shade. The moths fly little in the early part of the day, 

 but at dusk they may be seen in their jerky flight going short dis- 

 tances a foot or two above the vines. Egg laying may occur within 

 24 hours after the emergence of the female. 



Seasonal Abundance of Lauv.e. 



Where the winter flowage is removed 

 April 10, Avorms will be found in maximum 

 numbers during the periods April 25-May 

 20 and June 18-July 10. Should the flow- 

 age be removed INIay 10, the periods of 

 destructiveness will approximate May 15- 

 June 10 and July G-Jul}^ 25. 



Theatment. 



reflowing. 



When properlv timed, reflowing is the ^"■- -^;--^^' 



. p . , „ Moth, ur 



most effective method of clearing a bog of hugea. 



m-cworin : 

 Miirh fu- 



