184 Zessons in truit G7'0ivin^. 



9. Flooding tlie cranberry marsh at certain times is 

 necessary to maintain health of the vines and prevent 

 frost and insect attacks. Bearing plantations should be 

 under water from the close of growth in autumn until 

 after the frost season in spring (STi). 



10. Picking the cranberry should commence when the 

 fruit is well colored. Fruit of early and later varieties 

 should not be mixed. Cranberries keep best in somewhat 

 open boxes (275). 



11. The black-headed and yellow-headed cranberry 

 worms are held in check by controlling the water or by 

 spraying with kerosene emulsion (276). 



12. The fruit worm is combated by spraying with water 

 containing Paris green or by setting lighted lamps over 

 vessels of water at night (277). 



SUGGESTIOlSrS FOR LABORATORY WORK 



1. If a cranberry marsh is sufficiently near, have the 

 students visit it and study the methods of culture, includ- 

 ing the system of water supply, and the characteristics of 

 the plants. 



2. Study as many of the miscellaneous small fruits 

 named in section 5 as can be found in the vicinity, and 

 make such experiments in their culture as the season per- 

 mits. 



