CRANBKRR^■ (iROVVING 



33 



vines are not tlirilty \)\ rcducin.u tlie bud formation for tlie crop of the 

 following year. Resanding every otlier year controls this insect well on 

 most bogs, but a bog should not be sanded so often for this alone. 



(irowers should sweep their bogs with a net every few days till mid- 

 summer to find and gauge insect infestations (Fig. 29). It often does 

 not pay to treat a light infestation, especially if the crop promises well, 

 because of the mechanical injury involved. Counts of less than 9 gypsy 

 moth caterpillars or cutworms or less than 36 spanworms to 50 sweeps of 

 the net may be disregarded. Over 3 blunt-nosed leafhoppers to 50 sweeps 

 should be treated. 



w^m 



^A."^E / 



Fig. 30. Early Black Cranberries Ready to be Picked. 



Weedsifi 



All weeds should be removed from a bearing bog by the time the vines 

 bloom; and if sedges, rushes, cotton grass, or cut-grass appear later, they 

 should be cleared out again, regardless of the injury done in weeding. 

 Late fall and early spring, when the vines are dormant, is the best time 

 to dig out such woody weeds as liardhack, chokeberry, sheep laurel, leather 

 leaf, and poison ivy and any weeds that may be green then (Fig. 20 C). 



Water-white kerosene, 300 to 600 gallons an acre applied as a spraj' or 

 with a watering pot the second week in Ma\-, is a good control for grasses, 

 sedges, rushes, loosestrife, alders, and brambles. Iron sulfate, used dry 

 in Juh', controls sensitive and feather ferns and tear-thumb. A spray of 

 20 pounds of copper sulfate in 100 gallons of water, applied 400 gallons 

 an acre in mid-August, is the best treatment for nut grass. This spray, 

 applied 600 gallons an acre early in the spring or late in the fall, kills 

 haircap moss well. Ditch weeds and undesirable growths on the uplands 

 are killed with a spray of 15 pounds of sodium arsenite in 100 gallons of 

 water. 



'* Cranberry Canners, Inc., lias recently 

 It is splendidly illustrated with ijhotograiilii 



a handbook 



weeds. 



