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green to yellow-brown in a few days. Just before hatching they 

 become dark bluish or greenish ; this is the time when banding must 

 be applied. The larvae, which hatch in mid-March, are unable to 

 attack tightly closed buds or buds thickly covered with hairs, and 

 as they can only live without food for about a week, the cultivation of 

 late varieties of fruit trees with tightly closed or thickly haired buds 

 is advantageous. 



The females of the large winter moth [Hyhernia] defoliaria also 

 oviposit on thin branches in the crown. Newly hatched larvae can 

 live for 7-11 days without food at a temperature of 10° C. [50° F.]. 



RiEHM (E.). Chemische Pflanzenschutzmittel. [Chemical Agents 

 for Protecting Plants.] — Nachrichtenhlatt Deutschen Pflanzen- 

 schutzdienst, Berlin, i, nos. 1 & 2, 1st July & 1st August 1921, 

 pp. 6-7 & 9-10. [Received 13th March 1922.] 



There is comparatively little precise knowledge of the action of the 

 chemicals used for protecting plants against their various enemies, 

 but empirical methods have established the value of a number of 

 substances. Preparations recommended by their makers for all-round 

 use may be rejected as unworthy of serious notice. The Imperial 

 Biological Institute, working in conjunction with the German Plant 

 Protection Service, has introduced a uniform system of examination 

 with the object of determining the actual value of the numerous 

 preparations on the market. 



Lang ( — ). Bericht der Wurtt. Landesanstalt fiir Pflanzenschutz 

 Hohenheim iiber Rapsglanzkaferbekampfung. [Report of the 

 Wiirttemberg Land Institute for Plant Protection at Hohenheim 

 on Work against the Rape Beetle.] — Nachrichtenhlatt Deutschen 

 Pflanzenschutz dienst, Berlin, i, no. 2, 1st August 1921, pp. 10-11. 

 [Received 13th March 1922.] 



An apparatus, consisting of sticky boards attached to a handle, 

 has given good results against the rape beetle, Meligethes aeneus, F. 

 About 50 per cent, of the beetles were captured by passing over the 

 plants once, so that three passages at least are necessary. The last 

 of these must be done before blossoming, otherwise parts of the 

 blossoms may interfere with the adhesive action. Furthermore, 

 the plants are more easily damaged when advanced in growth. It is 

 best to drown the captured beetles. Of these, M. aeneus represented 

 89 per cent., Phyllotreta neynorum, L., 1-5 per cent., P. atra, F., 8 per 

 cent., and Ceuthorrhynchus assimilis, Payk., 1-5 per cent. 



Spraying with Urania green also gave good results. 



Rabbas ( — ). Bericht der Zweigstelle Aschersleben der Biologisehen 

 Reichsanstalt iiber die Versuche zur Bekampfung der Oelfrucht- 

 sehadlinge im Jahre 1920. [Report of the Aschersleben Branch 

 of the Imperial Biological Institute on the Experiments in Com- 

 bating Pests of Oil Crops in 1920.] — Nachrichtenhlatt Detitschen 

 Pflanzenschiitzdienst, Berlin, i, no. 2, 1st August 1921, p. 11. 

 [Received 13th March 1922.] 



Experiments in catching flea-beetles were made with a new apparatus 

 consisting of a rectangular wooden frame on which a narrow mesh 

 net, smeared with an adhesive, was stretched. Wires hanging loosely 



