464 



leaf-miner, Pegomyia hyoscyami ; in one case it seemed as if the pupae 

 were spread with manure containing beet leaves. Meligethes aeneus, 

 caused severe losses in turnip seed fields where catching machines were 

 not used ; early cutting to retard the flowering proved of doubtful 

 value. Cabbage top in swedes was proved, as in England, to be caused 

 by Contarinia nasturtii. A Nematode, Tylenchus hordei, was abundant 

 on roots of Poa pratensis, and Heterodera radicicola was recorded on 

 cucumbers. Against the winter moths, Cheimatohia hrumata and 

 C. boreata, a proprietary adhesive, " Falster," proved valuable and 

 economical, remaining sticky all the winter. The larvae have been 

 observed eating the flowers and fruits of black currants. Cutworms, 

 Euxoa (Agrotis) segetum, were very harmful to leeks and in mangel and 

 sugar-beet fields. Wireworms, Agrioies lineatiis, infested oats and 

 barley. 



Lees (A. K.). The Association of Black Currant Mite {Eriophyes ribis) 

 with Reversion Disease. — Ann. Kept. Agric. & Hortic. Res. 

 Sta. Long Ashton, Bristol, 1921, pp. 58-61. [Received 17th July 

 1922.] 



The following are the author's conclusions as a result of the 

 observations described in this paper : Normal bushes are generally 

 free from " Big Bud " infection (due to Eriophyes ribis), but may be 

 slightly attacked ; reverted bushes are usually attacked, but an 

 appreciable percentage are free ; bushes moderately strongly attacked 

 are always reverted ; though it is possible to have very reverted bushes 

 that are not attacked, it is not possible to have bushes that are heavily 

 attacked that are not reverted ; an attack of the mite in the first year 

 causes a bush to become more reverted in the second year than if it 

 had remained free from attack. 



Lees (A. H.) & Peren (G. S.). Spraying Trial for Control of Logan 



Beetles. — Ann. Kept. Agric. & Hortic. Res. Sta., Long Ashton, 

 Bristol, 1921, pp. 67-69. [Received 17th July 1922.] 



In view of the results obtained against Byturus tomentosus in the 

 previous year [R.A.E., A, ix, 414] a third spray was applied during 

 1921 on the 2nd June when the bushes were in full bloom. In all 

 cases the spray used consisted of 4 lb. lead arsenate and 100 gals. 

 water. The average infestation of the sprayed berries was 4 • 4 per cent. , 

 whereas the unsprayed ones showed an average of 19-8 per cent. 

 The results are considered satisfactory, and it is hoped that the same 

 amount of control may be obtained for some three years in succession ; 

 in this case spraying may be dispensed with for at least one or two 

 years. 



Wolff (M.) & Krausse (A.). Ein Nachwort zum Streit iiber den 

 Rapsglanzkafer. [A Final Word in the Controversy regarding 

 Meligethes aeneus.^ — ///. Landwirtschaftl. Zeitg., xli, 1921, 

 pp. 243-244, 250-251. (Abstract in Centralbl. Bakt., Paras. 

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

 pp. 435-437.) 



The authors are of opinion that in the case of severe infestations by 

 rape-beetles most of the injury is actually due to species other than 

 Meligethes aeneus, F., among which Centhorrhynchns assimilis, Payk., 

 is the most important. This view has been confirmed, they state, by 



