136 



is its favourite food-plant. In one case the damage was estimated at 

 4 per cent. Prospalfella berlesei gave good results in the control of 

 Aulacasjyis joentagona. The infestation of the cotton fields in the 

 provinces of Misiones and Chaco by Alabama {Aletia) argillacea has 

 increased. Both carbon bisulphide and potassium cyanide gave 

 excellent results asfainst ants. 



F. P. Que seront Mildiou et Eud6mis-Cochylis en 1916? [What will 

 be the prevalence of mildevv, Eitdemis and Cochylis in 1916?]— 

 Rev. Vitic, Paris, xUv, no. 1123, 6th January 1916^ pp. 19-21. 



After discussing the probable severity of the attack of mildew on 

 vines during 1916, reference is made to the fact that during the previous 

 year the parasites of Clysia amhiguella and Pclychrosis boirana were 

 rare ; consequently, during 1916 very little control is to be expected 

 from these natural enemies and the insect pests will probably prove 

 more important than the fungus disease. 



Kavaz (L.). a propos des futures Invasions des Insectes de la Vigne. 



[Concerning future Invasions of Insect Pests of the Vine.]- — 

 Progres Agric. el Vitic, MontpeUier, xxxiii, no. 7, 13th February 

 1916, pp. 149-152. 



During 1915 renewed outbreaks of Spargancthis pilleriana, Clysia 

 ambiguella. and Polychrosis boirana were recorded from the vineyards 

 of Argenteuil, Maconnais, Beaujolais, Herault, etc. The periodic 

 invasions of S. pilleriana depend upon the numbers of its parasites 

 and upon climatic conditions. Early frosts in spring appear to favour 

 the development of late-emerging larvae, the high temperatures of 

 July and August being harmful to the insect. Investigations recently 

 carried out in several districts have shown that the insect is regularly 

 distributed and that some areas which are usually infested are quite 

 free, while other, usually clean areas are seriously contaminated. 

 During the coming season, therefore, outbreaks are to be expected 

 in new districts. C. ambiguella and P. boirana usually occur together, 

 although of late years the former species has been the more widely- 

 spread. The winter mortality -of these insects has been less than in 

 previous years, and it is thus possible that in 1916 the damage done 

 will be more serious than in 1915. 



OsTERWALDER (A,), DuFch das Blatt- und Stengelalchen, Aphelen- 

 cJius ormerodis, Ritz. Bos., und Tylenchus dipsaci, Kflhn, verur- 

 sachte Krankheiten an Zierpflanzen. [Diseases of ornamental 

 plants caused by Aphelenchus ormerodis, Kitz. Bos, and Tylen- 

 chus dipsaci, Klilm.] — Bericht Schweiz. Versuchsanst. Obst-, Wein- 

 u. Gartenbau in Wddenswil f. 1913 u. 1914, Separate from 

 LondwirtschafilichesJaJirbuch d. Schiveiz, Bern, 1915, pp. 520-522. 

 [Eeceived 26th February 1916.] 



This paper records attacks by Nematodes on various ornamental 

 plants. 



