(17) 
(18) 
Transactions British Mycological Society. 
JANcCzEwSKI, E. von.—Les Périthéces du Cladosporium herbarum. Ibid. 
p. 271 (1893). 
Récherches sur le Cladosporium herbarum. Ibid. p. 147 (1894). 
Kern, E.—Report on the nature of brown spots on beet and on the 
nature of black spots on chilled beef. Quoted in Leighton and Douglas, 
“The meat industry and meat inspection,”’ pp. 1544, 1553. 
Larar, F.—Handb. d. Technisch. Mykol. tv, p. 270 (1906). 
MassEE, G.—“‘ Black Spot”’ of frozen beef. Journ. of Hygiene (1912). 
Monvoisin, M.—Les moisissures des viandes congelées. Rec. de Med. 
Veter. xcIv (1918). 
RABENHORST, L.—Kryptogamen-Flora. 
SACCARDO, P. A.—Sylloge Fungorum. 
ScuosTakowi1tscu, W.—Uber die Bedingungen der Conidienbildung bei 
Russthaupilzen. Flora, Lxxx1I, p. 362 (1895). 
TagBor, C. J.—Black spot on chilled and frozen meat. Cold Storage and 
Produce Review, Oct. 2oth, 1921. 
TaLaAyrRaAct, M. J.—Conserves de viandes par les procédés frigorifiques. 
Ann. d’hygiene publique, sér. 3, XLV, p. 166 (1901). 
OBSERVATIONS AND EXPERIMENTS ON 
CEREAL RUSTS IN THE NEIGHBOURHOOD 
OF CAMBRIDGE, WITH SPECIAL REFER- 
ENCE TO THEIR ANNUAL RECURRENCE*. 
By Karm Chand Mehta, M.Sc. 
(Professor of Botany, Agra College, Agra, India.) 
CONTENTS. 
PAGE 
Part I. INCIDENCE AND MEANS OF OVERWINTERING . : ; a!) age 
1. Introduction . ‘ : : : ; ‘ : - ; 148 
2. Review of literature : : : : : - 44 
3. Black rust (Puccinia graminis Pers. ) : : ‘ : - tay 
(a) Incidence . : s : : : — Tay 
(b) Overwintering of uredospores 5 : : : ; . 148 
(c) Hibernation through infected seed . 149 
(d) Aecidium on barberry and fresh outbreaks of rust on grami- 
naceous hosts : 3 f : - | a4g 
(e) Inoculation experiments with sporidia - : : 2 Se 
(f ) Inoculations with aecidiospores : ; i 4 =) SBE 
4. Brown rust (Puccinia triticina Erikss.)  . : : : sr) MDS 
(a) Incidence . : ; - ? : . Lau 
(b) Overwintering of uredospores : : : : : : 153 
(c) Aecidium on Thalictrum . : : 153 
5. Yellow rust (Puccinia glumarum Erikss. and Henn. ) : so) 1 alee 
(a) Incidence . : : : : 154 
(6b) Discussion of ‘ ‘Mycoplasm hypothesis” : : i 0 al ey 
(c) Overwintering of uredospores . : 157 
6. Influence of temperature on the pee of uredospores : ‘ 157 
7. Incubation periods . 4 ‘ . Log 
8. Culture of rusts at comparativ ely 1 ow temperatures : oo) Toe 
g. Infection from collateral hosts é F : : : ; 166 
Part II. SPECIALIZATION OF PARASITISM . : : : , = 16 
Io. Summary : : 174 
* Part of a dissertation submitted for the Ph.D. Prien at the Universit 
of Cambridge in 1922. 
