15 



WiLLE (J.). Chlorpikrin als Schadigungsbekampfungsmittel in seinen 

 Wirkungen auf Tier und Pflanze. [Chloropicrin as a Fumigant— 

 its Effects on Animals and Plants.] — Die Natnrwissenschaften, ix, 

 1921, pp. 41-48. (Abstract in Centralbl. Bakt. Paras. Infekt., 

 Jena, lite Abt., liv, no. 3-7, 12th July 1921, pp. 170-171.) 



The information given in this paper is substantially the same as in 

 one already noticed [R.A.E., A, ix, 252]. 



Stift (A.). Ueber im Jahre 1920 veroffentlichte bemerkenswerte 

 Arbeiten und Mitteilungen auf dem Gebiete der tierischen und 

 pflanzlichen Feinde der Zuckerrlibe. [Communications of Value 

 published in 1920 concerning the Animal and Vegetable Enemies 

 of the Sugar-beet.] — Centralbl. Bakt. Paras. Infekt., Jena, lite 

 Abt., liv, no. 8-10, 4th August 1921, pp. 261-272. 



A review of the literature on the subject for 1920 is given. 



ScHAFFNiT (E.). Bescliadigungen des Getreides durch Drahtwiirmer. 



[Injuries to Grain by Wireworms.] — Bericht Aitflyeten v. Feind. 

 u. Krankh. d. Kulturpji. in d. Rheinprov. 1918 u. 1919, pp. 47- 

 49. (Abstract in Centralbl. Bakt. Paras. Infekt., Jena, lite 

 Abt., liv. no. 11-19, 2nd September 1921, p. 338.) 



Injury to cereals by wireworms {Agnotes lineatus and other species) 



is common in the Rhine province. Remedial measures include the 



use of such baits as sliced potatoes, and pieces of oil-cake, and manuring 



with ammonium sulphate and kainit. Heavy rolling, deep ploughing 



.and the utihsation of poultry are also useful measures. 



ScHAFFNiT (E.). Getreidefliegen. [Dipterous Pests of Grain.] — 

 Bericht Auftreten v. Feind. it. Krankh. d. Kulturpfl. in d. 

 Rheinprov. 1918 u. 1919, pp. 43-47. (Abstract in Centralbl. 

 Bakt. Paras. Infekt., Jena, lite x^bt., liv, no. 11-19, 2nd September 

 1921, pp. 347-348.) 



Of the grain pests in the Rhine province, the frit-fly, Oscinella 

 {Oscinis) frit, L., principally attacks young winter and summer plants. 

 Sowing should not be done before 1st October and 1st April. Crop 

 rotation is important, as rye and wheat following clover are particularly 

 badly attacked ; lupin and root-crops should precede them. Manuring 

 with potassium nitrate, deep ploughing, and trap-crops are other 

 measures. 



Chlorops taeniopus, Mg., causes malformations of the ears of wheat ; 

 winter wheat and winter rye are injured in the same way as by the 

 frit-fly. This pest has two generations a year. Eggs laid in mid-May 

 give rise to adults at the end of August, and those laid in September 

 produce hibernating pupae. Measures against this pest are the same 

 as for the frit-fly, with the addition of heavy manuring. If the infesta- 

 tion is severe, wheat should be replaced by oats ; rye and barley are 

 less suitable for this purpose. 



Hylemyia coarctata. Fall., causes retarded development of wheat 

 and r3^e in late winter ; wheat is often entirely destroyed, rye seldom, 

 while winter barlev seems immune. Infestation is heavier on light. 



