CRANBERRY DISEASES 195 
period of inactivity are not certainly known. With the re- 
sumption of growth the tissue in the region of the mycelium 
is killed, and the lesions described above are produced. The 
fungus fruiting bodies, pycnidia, break through the epidermis, 
and expose their tips. Each pycnidium contains, at maturity, 
many pycnospores which coil out in a gelatinous tendril. A 
second type of fruiting body, perithecia, is sometimes de- 
veloped, but these occur less frequently, and are not regarded 
as important in the dissemination of the fungus. 
The conditions favoring the fungus are not unusual. Warm, 
wet weather furnishes the best conditions for maximum devel- 
opment. If berries are kept at a high temperature after pick- 
ing, the disease is greatly increased. 
Control. 
It has been shown that bordeaux mixture, 5-5-50, when 
thoroughly applied, gives satisfactory results. Resin-fish-oil 
soap at the rate of four pounds to fifty gallons is added as a 
sticker. Five applications are recommended. In general, 
not more than fifteen days should elapse between any two appli- 
cations. The first should be made early in June; the second 
later in June when the blossoms are ready to open; third, as 
soon as the plants have passed the height of their blooming 
period; subsequent applications at fifteen-day intervals. 
The evidence at hand indicates strongly that regulation of 
the water-supply is a very important factor in the control of 
all cranberry diseases. The amount needed varies with the 
type of soil and the contour of the land. The supply should 
be controllable. It should be constant; fluctuations should 
be avoided during the growing-season. Keeping the plants 
continuously moist, but not wet, is recommended. 
‘Bog sanitation should be practiced. Dead leaves and 
vines should be destroyed. This must be done before the 
spores are discharged, to be effective — at least within a-week 
after the water has been withdrawn from the bogs in the spring. 
