290 



sulphur used was double that of the lime. The Hme and water 

 used was the same in both cases, and the two mixtures were diluted 

 to the same degree. There seems to be practically no difference in 

 effectiveness between the two. 



Lime-sulphur seems unable to dissolve the scales of Aspidiotus 

 duplex, but when scale-insects [Diaspis penhigona, A. duplex and A. 

 perniciosiis) have been sprayed with lime-sulphur, the attachments 

 of the scales become loosened after a certain time, and some of 

 them drop from the tree, this occurred with both dead and apparently 

 living insects. The results of the experiment seem to show that the 

 insects that do not change colour a certain time after spraying are 

 not killed. 



Farsky (O.). Msice krvava {Schizoneura lanigera Hausm.). — Ochrana 

 Rosflin, Prague, i, no. 1-2, Mav 1921, pp. 10-11, 1 fig. [Received 

 14th March 1922.] 



A brief account is given of the injury caused by the Aphid, Eriosoma 

 {Schizoneura) lanigerum, Hausm., to apples in Moravia. Systematic 

 remedial measures should be undertaken and directed against isolated 

 as well as widespread infestations. 



Farsky (O.). Puklice svestkova {Lecanium corni Bch^.). — Ochrana 

 Rosflin. Prague, i, no. 1-2, Mav 1921, pp. 11-12. [Received 

 14th March 1922.1 

 Eulecanium {Lecanium) corni, Bch., is recorded as injuring plums 



in Moravia. 



Skody na oseni, zpusoben^ bzunkou {Oscinis frit, L., 0. pusilla, Meig.)- 

 [Injury caused to Grain by Oscinisfrit, L., and 0. pusilla, Meig.] — 

 Ochrana Rostlin, Prague, i, no. 1-2, Mav 1921, pp. 15-16. 

 [Received 14th March 1922.] 



Great damage is caused both to spring and winter grain crops by 

 Oscinella {Oscinis) frit, L., and 0. (0.) pusilla, Meig., barley, oats, 

 wheat and rye being attacked. Judicious selection of the time for 

 sowing is the principal measure advocated against these midges. 



Rambousek (F.). Casove otazky ochrany repni. [Notes on the 

 Protection of Sugar-beet.] — Ochrana Rostlin, Prague, i, no. 3, 

 July 1921, p. 4. '[Received 14th March 1922.] 



A brief account is given of the damage caused to sugar-beet by 

 Aphids, the beetles, Cassida nebulosa and Silpha obscura, and the beet 

 fly [Pegomyia hyoscyami]. 



Nov.\K (S.). Hojn6 vyskytovani se had'atka zhoubneho. [Notes on 

 Tvlenchus devastatrix~\ — Ochrana Rostlin, Prague, i, no. 3, July 

 1921, pp. 6-8. [Received 14th March 1922.] 



Many complaints have been received about the damage caused to 

 crops by Tylenchus dipsaci {devastatrix). The chief crops attacked 

 are rye, oats, barley, wheat, clover, lucerne, hops and onions. A brief 

 account is given of the injury done. The remedial measures advised are 

 chieflv cultural. 



