Cranberry and Currant 353 



second time. Destroy all caterpillars washed ashore while the 

 water is on. In dry bogs, spray early in May with arsenate 

 of lead. 



FiBE-WoRM, Cranberrt-Woem, or Black-headed Cranberry- 

 Worm {Eudemis vacdniana) . — Small larva, green, black- 

 headed, feeding upon the shoots and young leaves, drawing 

 them together by silken threads; two broods. 



Flooding for two or three days when the worms come 

 down to pupate. Arsenicals. 



Fruit- Worm {Mineola vacdnii). — Small caterpillar working in 

 the fruits, eating out the insides. 



For bogs with abxmdant water, reflow for ten days immedi- 

 ately after picking. Let the foliage ripen, and then turn on 

 water for winter. Draw off water early in April, and every 

 third or fourth year hold it on until the middle of May. For 

 dry bogs spray three times with arsenate of lead during July. 

 Burn all screenings. 



Yellow-headed Cranberry- Worm {Acleris minuta). — Stout, 

 yellowish green, small caterpillar, with a yellow head, webbing 

 up the leaves as it works. 



Hold the water late on the bog in spring to prevent egg- 

 laying. Arsenicals from the middle of May tOl July 1. 



Currant. Wilt, or Cane-Blight (Botryosphseria ribis). — Canes die 

 suddenly, the leaves wilting. 



No satisfactory method of control is known. Cut out and 

 bum affected plants. 

 Rust (Cronartium ribicola). — Brown rust pustules and brown 

 felt-hke growth on under side of leaf. Black currants espe- 

 iaUy susceptible. 



Grow at least 500 feet from white pine trees. 

 Currant Aphis (Myzus ribis). — Small, yellowish green lice 

 attacking the under side of the leaves, distorting the leaves 

 and causing them to turn red. 



Contact insecticides when leaves first appear. 

 Currant Measuring- or Span- Worm {Cymaiophora ribearia). — 

 Larva somewhat over an inch long, with stripes and dotted 

 with yellow or black, feeding upon the leaves. 



Hellebore, apphed stronger than for currant-worm. 

 Arsenicals; hand-picking. 

 W 



