CONTENTS. 



Department Bulletin No. 1101. — Unit Requirements for Producing 



Market Milk in Delaware: Page. 



Character and scope of the work 1 



Methods used in obtaining data 2 



Seasonal influence of winter and summer on cost factors 3 



Description of herds 3 



Requirements for producing milk 3 



Credit for calves 5 



Credit for manure .■ 5 



Requirements for keeping a bull 7 



Factors involved in the production of milk 7 



Feed 7 



Pasture 8 



Labor 8 



Other costs 9 



Percentage comparison of factors involved in milk production 11 



Average compared with bulk-line costs 12 



Monthly distribution of factors in milk production 13 



Summary 14 



Department Bulletin No. 1102. — Kernel Spot op the Pecan and Its 

 Cause : 



Distribution and history 1 



Economic importance 2 



Description of kernel spot 3 



Present investigations 4 



Supplementaiy experiment 8 



Laboratory cultures of kernel spot 8 



Analysis of results 11 



Control measures 11 



Summary 14 



Literature cited 15 



Department Bulletin No. 1103.- — Summary of Insect Conditions through- 

 out the United States During 1921: 



Introduction 1 



Corn earworm 5 



Hessian fly 9 



Chinch bug 11 



Green bug 15 



Pale western cutworm 19 



Alfalfa weevil 21 



Sorghum webworm 24 



European corn borer 28 



Camphor scale 31 



Mexican bean beetle 32 



Sweet-potato weevil 34 



Potato leafhopper 37 



Seed-corn maggot 39 



Cotton-boll weevil 42 



Pink bollworm 43 



Japanese beetle 44 



Satin moth 46 



Gipsy moth 48 



Brown-tail moth 50 



3 



