20 FARMERS BULLETIN 860. 



necessary the next season. Older vines are attacked, but with less 

 serious consequences. 



The beetles first appear on the bogs and on brush along the dams 

 during early July and remain throughout the summer. Indeed it is 

 not unusual to find them feeding in the early part of October. Egg- 

 laying begins in late July, with deposition just below the surface of 

 the ground. Hatching takes place the following May, but nothing is 

 known of the habits of the little grubs on cranberry bogs except that 

 they remain in the soil and are not thought to be extensive feeders on 

 cranberry roots. 



TREATMENT. 



Experiments conducted in cages have shoAvn that the beetles feed 

 ravenously upon unsprayed vines, but leave almost untouched those | 

 sprayed with Bordeaux mixture and arsenate of lead. When spray- 

 ing bog areas it is customary to omit spraying the young plantings, | 

 because they are not expected to bear fruit; but probably it would 

 pay Avell to spray these sections with Bordeaux mixture and arsenate 

 of lead (3 pounds of the paste or 1^ pounds of the powder to 50 gal- 

 lons of Bordeaux mixture) wdien the usual rot sprays are applied. 

 Leaves of young vines often are noted in badl}'^ diseased condition 

 due to the attack of one of the rot diseases of the cranberry fruit and 

 it is therefore doubly important to spray them Avhere the foregoing 

 insect and fungous troubles prevail. 



FRUIT-ATTACKING INSECTS. 



CRANBERRY FRUITWORM.' 



Probably the most troublesome insect enemy of the cranberry in 

 Massachusetts and AVisconsin, and one which causes heavy losses of 

 fruit annually, is the cranbei-ry fruitworm. In New Jersey the pest 

 is of minor importance, although each season it may be found in 

 scattering numbers throughout the cranberry region. The reason for 

 its scarcity in New Jersey is not clear. Apparently conditions are 

 favorable for its development in large numbers, but as a matter of 

 fact the fruitW'orm is of so little importance in that State that the 

 growers are not finding remedial measures necessary. There is only 

 one brood, but, owing to the manner of feeding and hibernation of 

 the larvae, successful control is very difficult. 



Chakactek ok In.ukv. 



The first sign of its work, premature coloring of the berries, is 

 well known to most growers. Upon hatching, the larva goes to some 

 point near the stem end of the berry, burrows into the flesh, and closes 



^ Mineola vnccinii Riley. 



