466 



Reichert (A.). Die Apfelmotte {Argyresthia conjugella. Z.). [The 

 Apple Moth, A. conjugella.] — Der Lehrmeister i. Garten ti. Klein- 

 tierhof, xviii, 1920, p. 225. (Abstract in Centralhl. Bakt., Paras., 

 Infekionskr., Jena, lite. Abt., Ivi, no. 17-22, 14th July 1922, 

 pp. 451-452.) 



In the Liineburger Heath region (North Germany) many varieties 

 of apple are attacked b}' Argyresthia conjugella, Z. The chief food-plant 

 is the service berry, the fruits of which should be collected before the 

 larvae are mature. Other measures include the cleaning of the apple 

 trunks in winter, the digging up and treading down of the ground 

 beneath the branches in autumn or early spring, traps, the painting 

 of the trunks with an adhesive or the hanging among the branches 

 of rods coated with adhesive. 



HoLLRuxG ( — ). Eine fiir Deutschland neue ErkrankungsJorm der 

 KartoJfel : Nematoden ! [Nematodes : A Potato Disease new 

 to Germany.] — Dtsch. Landwirtschaftl. Presse, xlviii, 1921, p. 507. 

 (Abstract in Centralhl. Bakt., Paras., Infektionskr., Jena, lite. 

 Abt., Ivi, no. 17-22, 14th July 1922, p. 492.) 



A heavy infestation of potato roots by Heterodera radicicola. Greet, 

 is recorded. The leaves were blackened, the roots were in a state of 

 dry rot and the tubers were rather small. The female Nematodes 

 were firmly attached to the roots. It is noted that Tylenchus infests 

 the tubers and not the roots of the plant. 



ZoBiERiMANN (H.). Nematodenbcfall {Heterodera) an KartoJfeln. — 



Dtsch. Landwirtschaftl. Presse, xlviii, 1921, p. 561. (Abstract in 

 Centralhl. Bakt., Paras., Infektionskr., Jena, lite. Abt., Ivi, 

 no. 17-22, 14th July 1922, pp. 488-489.) 



The author believes that the disease of potatoes attributed in the 

 above paper to Heterodera radicicola, Greet, is identical with the 

 infestation noticed by him in Mecklenburg since 1913 ; he gives an 

 account of the latter which is substantially the same as in a paper 

 already noticed [R.A.E., A, viii, 466]. It is doubtful whether 

 H. schachtii, Schmidt, or a new form related to it was concerned. 



Ra:\ibousek (F.). Prognose der Riibenschadlinge. [The Forecasting of 

 Beet Pests.] — Zeitschr. f. Zuckerind. d. cechoslov. Repiib., xlv 

 (N.F. 2), 1921, pp. 211-212. (Abstract in Centralhl. Bakt., Paras., 

 Infektionskr., Jena, lite. Abt., Ivi, no. 17-22, 14th July 1922. 

 pp. 522-523.) 



In Czecho-Slovakia most sugar-beet pests appear only towards the 

 end of June, Atomaria, Silpha, Juhis and wireworms being exceptions. 

 .The pests should therefore be combated before planting beet. For 

 forecasting their occurrence attention should be paid to the preceding 

 crop, adjacent fields and the borders of the beet-field. Baits must be 

 used as indicators. Clover and similar fodder-crops are always followed 

 by numerous beet pests, and when clover is ploughed in, the dying roots 

 provide a temporary abundance of food for many pests that are later 

 driven by hunger to attack beet. In 1921 clover and corn were infested 

 with Enchytraeids, particularly Enchytraeus galha, Hoffm., and 

 E. huchholzi, Vejd., together with wireworms and Melolonthid larvae. 



