23 1 MAIER, ( ).— Zur Frage der Vertilgung des Hederich 



(Dills) durch Chilisaltpeterlosung. 



Wchnbl. Landw. Ver. Bayern, (1901), S. 501. 



A 15 per cent solution S. of I. applied at the rate of 150 1. per 



J4 ha, gave good results, even when the weed was in bloom. 



232 MAIER, ( ).— Vertilgung des Hederichs, (Dill). 



Wchnbl. Landw. Ver. Bayern, (1902), S. 263. 



233 MAIER, ( ). — Beitrage zur Hederichvertilgung. 



Wchnbl. Landw. Ver. Bayern, (1903), S. 101. 



234 MAIZIERES, ( ). — Produits chimiques et mauvaises 



Herbes. Nouvel emploi du sulfate de cuivre. 

 Nos experiences. Nos formules. 



L'Engrais, 1897, p. 540. 



The author experimented with the following solutions : 



A. A solution of 5 per cent sulphate of copper. 



B. A solution of the following: 



3 per cent sulphate of copper; 

 2 per cent sulphate of iron ; 

 0.5 per cent sulphuric acid. 



C. A solution of the following : 



2 per cent sulphate of copper; 



3 per cent sulphate of iron ; 

 0.5 per cent sulphuric acid. 



The three formulae given had practically the same action. 



235 MANGIN, L. — La lutte contre les maladies parasitaires, 



(Naptholate de fer). 



Rev. Vit, T. S, p. 486. 



236— MARGOTTET, J. C— Resume des recherches de Grif- 

 fiths sur l'emploi du sulfate de fer en agricul- 

 ture. 



Ann. Sci. Agron. 1887, T. 2, pp. 379-39°. 



237 MARCHAL, E. — Immunisierung der Pflanzen gegen 

 parasitiire Pilze durch Absorption pilztotender 

 Stoffe. 



Ztschr. Pflanzenkrank., Bd. 13, S. 243. 



A solution 5/10000 S. of I. did not prevent the development of 

 Bremia Lactucae. 



