UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 1037 



CoBtributloa from the Bureau of Plant Industry 

 WM. A. TAYLOR, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



August 19, 1922 



THE CONTROL OF SAP-STAIN, MOLD, AND 



INCIPIENT DECAY IN GREEN WOOD 



WITH SPECIAL REFERENCE 



TO VEHICLE STOCK 



By 



NATHANIEL O. HOWARD, Pathologist 

 Office of Investigations in Forest Pathology 



(In cooperation with the Forest Products Laboratory of the United States Forest Service, 



Madison, Wis.) 



CONTENTS 



Page 



Introduction 1 



Sap-Stain 3 



Other Fungous Organisms Causing Sur- 

 face Discolorations in Green Timber . 12 

 Factors Which Favor the Growth of Sap- 

 Stain and Mold Fungi 14 



Durability of Stained or Molded Wood . 17 



Losses Due to Sap-Stain or Mold. ... 18 



Control Measures 21 



Summary 60 



Literature Cited 52 



WASHINGTON 

 GOVERNMENT PRINTING OFFICB 



1922 



