104 Pflanzenkrankheiten. 



in Nordamerika verbreitete Krankheit der Tomate identisch mit 

 der auf Solanum tuberosufn 1908 in Westfalen (A. Spiecker- 

 mann) aufgetreten Krankheit ist, zeigt Verf., dass die Tomaten- 

 krankheit zu Vasto lokalisiert ist. Spieckermann glaubt, dass 

 seine Kartolfelkrankheit auf das Bacterium sepedonicum zurückzu- 

 führen ist. Matouschek(Wien). 



Pethybridge, G. H., Investigations on Potato Diseases. 

 (Seventh Report). (Journ. Dep. Agric. and Tech. Instr. for 

 Ireland. XVI. p. 564—596. 12 pl. 1916.) 



The diseases dealt with in this Report are Blight {Phytophthora 

 infestans)^ Stalk Disease {Sclerotinia sclerotiorum), Botrytis Disease 

 {Botrytis cinerea), Verticillium Disease {Verticillium alboatrum), and 

 Collar Fungus {Hypochnus Solani). 



In the case of "Blight", the work done during the year 1915 

 was chiefly in continuation of previous experiments as to times of 

 spraying, and the relative value of various spraying Compounds. A 

 number of experiments were made to test the effect of planting 

 blighted tubers, but the results so far obtained are not conclusive. 



Further work was also done on the Stalk Disease, and it is 

 empbasised that Sclerotinia sclerotiorum has no ^o^^ry^/s stage, while 

 at the same time there is a perfectly distincl disease of potatoes 

 caused by Botrytis cinerea. 



The latter disease is described in some detail. 



Verticillium disease can no longer be regarded as a form of 

 Leaf Roll or Leaf Curl, but is distinct. The death of the plant is 

 caused by the choking of the vessels with the mycelium of the 

 fungus. Its parasitism was proved by infection experiments. In this 

 and in the foregoing disease remeding measures are discussed. 



In connection with Hypochnus Solani, the confusion which has 

 arisen in the nomenclature of the species is discussed. No rot was 

 caused by H. Solani when inoculated into healthy living potatoes. 

 It is however often found in association with rots due to other 

 causes, which may have led to previous Statements as to its being 

 a cause of "wet rot". 



Some miscellaneous observations on other potato diseases are 

 added. E. M. Wakefield (Kew). 



Peyronel, B., Una nuova malattia del lupino prodotta da 

 Chalaropsis thielavioides Peyr. nov. gen. et nova sp. [Une 

 nouvelle maladie du lupin causee par Chlalariopsis thiela- 

 vioides Peyr. nov. gen. et nova sp.]. (Le Stazione Sperimentali 

 Agrarie Italiane. IL. p. 583—596. 1916.) 



L'auteur a etudie un nouveau parasite du lupin. Le Champignon 

 attaque en gen^ral la base des plantes, penetrant par les cicatrices 

 des cotyledons, des feuilles inferieures, ou par de petites lesions. 

 II se developpe dans le parenchyme cortical et dans le liber; dans 

 les cellules du parenchyme, il forme de petites pelotes de mycelium 

 et il y developpe sur de courtes branches des macroconidies de 

 couleur foncee. Apres quelque temps l'dpiderme creve et le my- 

 celium, au contact de l'air, commence ä developper des conidio- 

 phores, qui produisent une masse blanche de microconidies. Celles-ci 

 ont une forme cylindrique aplaties des deux cOtes; ce sont des 

 spores endogenes, formdes en assez grand nombre dans un tube 

 ouvert et formant une chalne apres l'expulsion. Les microconidies 



