503 



StranAk (F.). Prispevek k poznani fytopathologisk^ho vyznamu 

 trasnenek. [A Contribution to a Knowledge of the phyto- 

 pathological Importance of Thrips.] — Zemedelsky Archiv, Prague, 

 1920, pp. 1-5, figs. (Abstract in Neuheiten anf d. Gehieie d. 

 Pflanzenschutzes, Vienna, 1922, no. 2, p. 7.) 



In Czecho-Slovakia the spread and abundance of thrips increases 

 when the conditions are unfavourable to the cereals concerned. The 

 injury is less when cereals are grown after leguminous crops. Early- 

 sown cereals suffer particularly. Rye is the most affected (25-100 per 

 cent.), wheat (5-70) and barley less (5-40), and oats much less. Haplo- 

 thrips {Anthothrips) aculeatus is the chief species on rye, which is also 

 infested by Limothrips denticornis and Aptinothrips rufus. Stenothrips 

 graminum is the most common on wheat, H. aculeatus and L. denticornis 

 being less frequent. L. denticornis is the principal species on barley, 

 on which Aeolothrips fasciatus and 5. graminum also occur. Oats are 

 attacked by S. graminum and L. denticornis, seldom by Dictyothrips betae 

 and Bolacothrips. 



The damage done by thrips is more serious than is generally recog- 

 nised. Even the apparently sound spikelets are weakened in an 

 infested ear of rye. The lower ones are those usually destroyed, and 

 the upper ones are deprived of support and the ear breaks. 



MoRGENTHALER (O.). Eine Gallenbildung an Haselkatzchen. [A Gall 



Formation on the Catkins of the Hazel] — Mitt. Naturf._ Ges. 

 Bern, 1920, p. 48. (Abstract in Neuheiten auf d. Gebiete d. 

 Pflanzenschutzes, Vienna, 1922, no. 3, p. 5.) 

 The gall-midge, Diplosis corylina, Lw., produces galls in the catkins 

 of hazel, and the mite, Eriophyes avellanae, causes galls in the buds. 



Israel (W.) . Dendrologische Notizen. Schadlinge an Maulbeerbaumen. 



—Mitt. Deutschen Dendrolog. Ges., 1920, 1921, p. 301_. (Abstract 

 in Neuheiten auf d. Gebiete d. Pflanzenschiitzes, Vienna, 1922, 

 no. 3. p. 6.) 

 In Serbia mulberries are attacked by Bostrychid larvae, by a leaf- 

 spinning species of Hyponomeuta, and by the caterpillars of Acronycta 

 aceris and Smerinthus tiliae. In Germany the author has noticed the 

 caterpillar of Cossus cossus inside the stem and roots of mulberry. 



Krausse (A.). Notiz uber den Gabelschwanz, Dicranura vinula, L., 

 und einen seiner Parasiten, Apanteles vinulae, Bouch^. [A Note on 

 D. vinula and one of its Parasites, A. vinulae.] — Zeitschr. f. 

 Forst- u. Jagdwesen, liv, 1922, pp. 25-28, 1 fig. (Abstract in 

 Neuheiten auf d. Gebiete d. Pflanzenschutzes, Vienna, 1922, no. 3, 

 p. 9.) 

 The larva of Dicranura vinula, L., lives on poplars and willows. Its 



parasite, Apanteles vinulae, Bch., is not synonymous with A. affinis, 



Nees. 



Kaven (— ). Tierisehe Schadlinge an Himbeeren. [Animal Pests of 



Raspberries.] — Forderer im Obst- u. Gartenbau, 1920, no. 25, p. 1. 



(Abstract in Neuheiten auf d. Gebiete d. Pflanzenschutzes, Vienna, 



1922, no. 3, p. 9.) 



Raspberry shoots may be recognised to be infested by Incurvaria 



{Lampronia) rubiella by their withered appearance, and they must be 



