44Q WUTHRICH, E.— Uber die Einwirkung Metallsalzen 

 und Sauren auf die Keimfahigkeit der Sporen 

 einiger der verbreitetsten parasitischen Pilze 

 unserer Kulturpflanzen. 



Ztschr. Pflanzenkrank, (1892), S. 16-31; 81-94. 



On Phythophthora, Peronospora, Puccinia, Ustilago, neither the 

 complete work of mercuric chloride nor the low price of S. of 

 I. can take the place of Copper Sulphate. 



441 ZIMMERMAN, A.— Over de Enchytrae iden en haar 



Vorkommen in de Koffiewartels. 



Korte Berichten Uit S'Lands Plantentuin. 



Ztschr. Pflanzenkrank. Bd. IX, S. 169. 



S. of I. successfully used to combat nematode in Coffee Plant. 



442 ZWEIFLER, FR. — Versuche mit Schutzmitteln gegen 



Peronospora und schwarzen Brenner. 



Die Weinlaube, (1901), No. 15, S. 176. 

 Centbl. Agr. Chem. Bd. 30, S. 819. 



A 3 per cent solution S. of I. injured young branches. Old leaves 

 not injured. Hairy leaves resist injury; smooth leaves are 

 burned. 



443 (ANON.) — Preventive for Plum Rot. 



Amer. Gard., Vol. XIII (1892), p. 180. 



Burn leaves in autumn; spray before buds open in spring with 

 S. of I., and after flowers open, with sulphide of potassium. 



444 (ANON.)— Rust in Wheat. 



Gard. Chron. (London), 3rd Ser., Vol. X, p. 521. 



Spraying with I oz. S. of I. to the gal. water retarded appear- 

 ance of rust, destroyed the rust when it appeared and prevented 

 its appearance for fourteen days afterward. 



445 ANON, ( ). — Apple Scab. 



Amer. Agr., Vol. LI, (1892), p. 139. 



Uses a solution of 1 lb. S. of I. to 1 gal. wafer. 



446 ANON, ( ).— Preventive for Plum Rot. 



Amer. Gard. Vol. XIII, (1892), p. 180. 



447 (ANON).— Rust in Wheat. 



Gard. Chron., 3rd Ser., Vol. X, (1891), p. 521. 



