172 STATE BOARD OF AGRICULTURE. 



lege, falls under two heads; that done on the Adams project and work 

 done in accordance with the Hatch fund. 



Work Under Adams Fund. — A fomial statement of the Adams pro- 

 ject is: A study of the lind> and twig diseases of two fruit trees. A 

 serious canker of a])ple has (tccupicd niv ationjinn. This disease was 

 found in several places in the northern part of Iho lower peninsula and 

 during last July, field studies were made on its prevalence, the amount 

 of damage and varieties affected. Control measures were tried in two 

 co-operative experiments and these have yielde<l decisive results. The 

 causal organism has been isolated, grown in pure culture, inoculated 

 into apple and pear trees and reisolated. At present the disease is 

 being studied under the following lines: 



(a) Cultural characteristics of the disease producing organism. 



(b) Relation of the fungus to the host. 



(c) Practical control measures. 



In the line of practical control measures the pneumatic hammer has 

 been utilized to drive a chisel and the usefulness of this tool for the 

 eradication of cankers and for tree surgery is reported in a separate 

 article which is to be printed with this report. Attention is also be- 

 ing paid to various ])aints and wound coverings Avliich may be found 

 suitable for use in covering wounds made by cutting out cankers and 

 which will not interfere with the normal wound callus formation. 



WorJ: Under Tlateh Fund. — The plant disease survey of the state has 

 been continued and state correspondence on ])lant diseases answered. 

 One publication "A Preliminary Host Index of the Fungi of Michigan. 

 Exclusive of the Basidiomycetes, and Including the Plant Diseases of 

 Bacterial and Physiological Origin" has been published in the 14th 

 report of the Michigan Academy of Science (1913). The annual report 

 of the plant disease survey of the state has been made under your 

 direction. Field experiments have been made in the control of various 

 l)otato diseases and an attempt was made to detenuine accurately the 

 extent of damage done by I^iie Blight of the ])olalo last year. The re- 

 sults of this work are included in a manuscript which was submitted in 

 April to the director of the experiment station. .\ manuscript is in 

 preparation upon the relation of Pln/fophlJiorn infrsfan.'i f^ront.l De- 

 lia ry. to the weather. 



A co-operative experiment in the control of Fire l>light of apples Avas 

 undertaken at the farm of Miss Martha Wilson of Charlevoix. A survey 

 of the orchard was made,, and a senior student. ^Ir. J. A. ^reClintock 

 was sent at Miss Wilson's expense to cut out the cankers and blighted 

 twigs. An examination this spring shows that althouirh over 200 

 cankers were cut out. only 5 limbs developed the disease this year. 



The Botanical division of the experiment station is cramped for room. 

 High i»ressure steam is needed for ready o])erati(>n of several ]u'eces of 

 apparatus. The specimens sent in by fanuei's throughout the state, and 

 those collected during field tri])s are increasinc" in number and a proper 

 housinir for these should be lu'ovided. It miiiht be well to have these 

 arranged by hosts accoi-ding to the i>lans followed by other exneriment 

 stations, and soon the specimens would form a valuable reference col- 



