468 



Stellwaag (F.). Fruhjahrbekampfung einiger wichtiger tierischer 

 Schadlinge der Obstbaume und Beerenstraucher. [Spring Treat- 

 ment of some of the more important Animal Pests of Fruit Trees 

 and Berry Bushes.] — Flugschrift Staatl. Lehr- u. Versuchstation 

 Wein- u. Obstbau, Neustadt a.Hdt. (Abstract in Zeitschr. Pflan- 

 zenkr. Stuttgart, xxx, no. 4—5, 1920, pp. 174-175.) 



Instructions are given for combating Aphids with nicotine, Nygmia 

 phaeorrhoea {Euproctis chrysorrhoea) and Malacosoma neiistria with 

 Urania green, Cheimatobia brumata with the usual remedies, and the 

 gooseberry sawfly [Pteronus ribesii] either with nicotine-soap or 

 Urania green. 



DuYSEN (F.). Einwirkung des strengen Winters und der sommer- 

 lichen Dtirre auf Schadlinge der Pflanzen. [The Effects on 

 Plant Pests of the severe Winter and of the Summer Drought.] — 

 Verh. Botan. Vereins d. Provinz Brandenburg, Ix, 1918, pp. 140-141. 

 (Abstract in Zeitschr. Pflanzenkr. Stuttgart, xxx, no. 4—5, 

 1920, p. 177.) 



Contrary to expectation the two factors mentioned in the title 

 resulted in a serious increase of infestation and injury by various 

 pests, such as Euxoa (Agrotis) segetmn on potatoes, Bruckus pisorum 

 {pisi) on peas and Apion fuscirostris on the pods of Sarothamnus. 



Wahl (B.). Die Erscheinungen von mangelhafter Ahrenbildung und 

 von Weissahrigkeit bei unserem Getreide. [Defective Ear For- 

 mation and White Ear Disease of our Wheat.] — Nachrichten 

 Deutsch. Landwirtschaftsgesell. OesterreicJi, Vienna, N.S., iii, 1919, 

 p. 291. (Abstract in Zeitschr. Pflanzenkr. Stuttgart, xxx, 

 no. 4-5, 1920, p. 179.) 



Defective ear formation and the white ear disease of wheat are due 

 to a number of causes including attack by insects such as Anisoplia 

 spp., Zabrus tenebrioides, Cephus 2yy9^naeus, frit-fly [Oscinella frit] 

 (only in Scandinavia), Mayetiola destructor, mites, Aphids, various 

 caterpillars, and thrips. 



ViTZTHUM (H.). Gaste unserer Schildlause. [Guests of our Scales.] 

 — Mikrokosmos, xii, 1918-19, pp. 123-126. (Abstract in 

 Zeitschr. Pflanzenkr. Stuttgart, xxx, no. 4-5, 1920, p. 180.) 



This reviews the various mites that are found, especially in winter, 

 under the shield of scale-insects. Hemisarcoptes coeds ug us, Lign., 

 attacks the eggs of Lepidosaphes ulmi {Mijtilaspis p)07nicorticis) and 

 those only. Most other mites are harmless to the scales they are 

 associated with. 



Schumacher ( — ). Wanzen als Bewohner von Koniferenzapfen. 



[Bugs as Inhabitants of the Cones of Conifers.] — Deutsche Entom. 

 Zeitschr., 1918, pp. 406-407. (Abstract in Zeitschr. Pflanzenkr., 

 Stuttgart, xxx, no. 4-5, 1920, p. 184.) 



The Lygaeid bugs, Gastrodes abietis, L., and G. ferrugineus, L., are 

 recorded from fallen fir-cones from Bialowies, Lithuania. The former 



