COnSTTENTS. 5 



Department Bulletin No. 685. — Honeybees and Honey Production in 



THE United States — Continued. Page. 



Market 32 



Supply and prices 35 



Soui'ces of pollen and nectar 48 



Nectar sources for surplus honey 53 



Geographical distribution and characteristics of important honeys 54 



Production of 1917 58 



Conditions and prospects for 1918 59 



Department Bulletin No. 686. — Further Studies of the Rots of Straw- 

 berry Fruits: 



Introduction 1 



Rhizopus 2 



Type of rot induced 2 



Importance of careful handling 2 



Importance of low temperature 3 



Washing strawberries 4 



Temperature at time of picking in relation to decay, 7 



Botrytis 8 



Relation of Botrytis infection to moisture conditions 1 8 



Growth of Botrytis on strawberries under refrigeration 9 



Relation of Botrytis to infection by Rhizopus 10 



Summary 12 



Literature cited 14 



Department Bulletin No. 687. — Digestibility of Some Seed Oils: 



Introduction 1 



Experimental methods 2 



Corn oil 3 



Soy-bean oil 6 



Sunflower-seed oil 9 



Japanese mustard-seed oil 11 



Rapeseed oil 13 



Charlock oil 15 



Summary .■ 17 



Department Bulletin No. 688. — Marketing Berries and Cherries by 

 Parcel Post: 



Strawberries 2 



Blackberries 10 



Blueberries or huckleberries 11 



Raspberries 13 



Cherries 15 



Obtaining and retaining customers 17 



Department Bulletin No. 689. — The Southern Grain Plant-bug: 



Introduction 1 



Natiu^e of damage 1 



Description of stages 3 



Distribution 11 



Review of Uterature 12 



UnpubHshed records 13 



Food plants 14 



Seasonal history and habits 14 



Niunber of generations annually 21 



Natural enemies 21 



Climate as a control factor 23 



Methods of artificial control 23 



General summary 25 



Literature cited 26 



Department Bulletin No. 690. — Marketing Practices of Wisconsin and 

 Minnesota Creameries: 



.Introduction j 



Factors which influence the marketing practices of creameries 1 



Buying poKcies and methods of creameries ^ 



Marketing creamery by-products ^ 



Transportation of creamery butter to market " 



