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sulphur content basis. No injury followed any test. It is very 

 doubtful if dry soda sulphur can be used on the sulphur content 

 basis, because of Hability to damage. This form appears to fill a most 

 important place in that it mixes thoroughly with all oil emulsions, 

 thus making a combination spray for whitefly, scale-insects, and rust 

 mites. Citrus growers are advised to test on a small scale all these 

 dry forms on two distinct bases, namely, on sulphur content basis 

 and on cost basis. 



Stranak (F.). Dnesni stav kalamity zpusoben6 zavijecem fepovym. 



[Measures against Phlydaenodes sttdi calls.] — Separate from Csl. 

 Zemedelce, Prague, iii, no. 13, 25th August 1921, 7 pp., 7 figs. 

 [Received 3rd April 1922.] 



The various mechanical devices employed in Czecho-Slovakia for 

 the destruction of Loxostege {Phlydaenodes) stidicalis, L., are described 

 and illustrated. 



Rambousek (F.). Letosni kalamita zpusobena zavijecem repovym. 



[This Year's Injury by Phlydaenodes stidicalis.] — Ochrana Rostlin, 

 Prague, i, no. 4, October 1921, pp. 1-5, 2 figs. [Received 3rd 

 April 1922.] 



The work of previous authors with regard to Loxostege {Phlydae- 

 nodes) stidicalis, L., in various countries and its recent introduction 

 into Czecho-Slovakia are discussed. 



The remedial measures suggested are spraying with barium chloride 

 or Urania green in order to poison the larvae, and the use of deep 

 furrows containing unslaked lime, shavings or sawdust, mixed wdth 

 kainit or some other poison. The migration of the larvae may possibly 

 be prevented by laying down strips of canvas soaked in tar. The pupae 

 should be collected from the ground and destroyed. 



Farsky (O.). Muze skakac bukovy ohroziti u nas pestovani buku ? 



[Damage by Rhynchaenus fagi to Beech Trees.] — Ochrana Rostlin, 

 Prague, I, no. 4, October 1921, pp. 5-7, 1 fig. [Received 3rd April 

 1922.] 



When the adults of Rhynchaenus {Orchestes) fagi, L., emerge from 

 hibernation, they feed on the leaves of beech from about April to June. 

 The eggs are generally laid singly on the leaves near the mid-rib. The 

 larvae eat through the parenchyma and mine in the leaf, feeding for 

 about three weeks before pupation, which lasts about ten days. The 

 weevils emerging in the summer are very voracious feeders, attacking 

 almost any vegetation, including deciduous trees and conifers, as well 

 as shrubs, grasses, etc. They hibernate under leaves on the ground, 

 in cracks in the bark, or in the mines made in the leaves by the larvae. 



Ochranna opatfeni proti mure osenni. [Measures against Agrotis 

 segetum.] — Ochrana Rostlin, Prague, i, no. 5-6, December 1921, 

 pp. 2-5, 3 figs. [Received 3rd April 1922.] 



Euxoa {Agrotis) segetum, Schiff., caused serious damage to potatoes 

 and other crops during 1921 . The more important preventive measures 

 are the improvement of crops by the judicious use of artificial manures, 



