141 



The natural enemies are reported to be Elaterid larvae [Hemirhipiis 

 fascicularis, F.), Bracon eryihrogaster, BruUe, and Doryctcs radial us, Cr. 

 The author found B. eryihrogaster ovipositing in numbers in the 

 galleries of this insect. A small Eumenid wasp constructs its nest 

 outside the pupal cell, and so prevents parasites from gaining access 

 to the pupae. 



The remedial measures recommended are the felling of all standing 

 dead timber as soon as possible, and if not used at once the logs 

 should be barked or put in water. Unbarked logs, poles and similar 

 material should never be left during the dangerous season, from May 

 to August. Infested material which cannot be utilised, and all rubbish, 

 should be burned before the beetles can emerge. The destruction of 

 Crataegus near tracts of hickory would be beneficial. 



Riviere (C). Sacchariim spontaneum. — C.R. Acad. Agric. France, 

 Paris, vi, no. 38, 15th December 1920, pp. 912-916. (Abstract 

 in Inter nat. Rev. Sci. & Pract. Agric, Rome, xii, no 2, February 



1921, pp. 187-188.) [Received 13th January 1922.] 



The cultivation and uses of Sacchariim spontaneum, used for its fibre, 

 are discussed. This plant is gradually spreading in the eastern basin 

 of the Mediterranean, and is found in small patches in the neighbour- 

 hood of Bone, Algeria. It is subject to attack by the Noctuid moth, 

 Sesamia vu-teria, StoU {nonagrioides, Steph.), and should not be grown 

 near vinevards, as S. vuteria is a very serious pest of vines. 



Paillot ( — ). Sur un Parasite nouveau des Plantations de Pechers 



dans la Vallee du Rhone. — Progres Agric. et Vitic, Montpellier, 

 Ixxvii. no. 3, 15th January 1922, pp. 69-71. 



The peach orchards in the Rhone Valley are threatened by the 

 ravages of the sawfly, Neurotoma nemoralis. It had previously 

 occurred in certain limited areas, but is now rapidly spreading. The 

 area infested in 1921 was almost five times that of "the previous year. 

 The adults are in flight towards the end of April, the main egg-laying 

 period occurring about 10th May. The eggs hatch in from 6 to 8 

 days, according to the temperature. The larvae are mature in about 

 a fortnight and enter the soil, where they hibernate. 



Sprays with a basis of nicotine or quassia are advocated against 

 this pest. Hellebore is also fairly efficacious. In severe infestations 

 two sprayings are necessary, applied with an interval of five or six days. 

 The first spray should be applied as soon as the first larvae appear. 

 During the present experiments the formulae used were : \\ gal. 

 nicotine (at 1 lb. to the gallon), 20 lb. soft soap and 100 gals, water ; 

 10 lb. quassia (chips), 15 lb. soft soap and 100 gals, water ; and 

 12| lb. white hellebore (root), 1 lb. gelatine and 100 gals, water. 



Flury (F.) & Hase (A.). Priifung von Pflanzenschutzmitteln. [The 

 Testing of Substances for Plant Protection.]— 3////. deritsch. 

 landw. Ges., 1920, pp. 605-606. (Abstract in Centralbl. Bakt. 

 Paras. Infekt , Jena, lite Abt., Iv, no. 14-20, 18th January 



1922, p. 368.) 



A department for testing preparations sold for plant protection has 

 been estabUshed at the Imperial Biological Institute for Agriculture 

 and Forestrv in Berlin-Dahlem. The formulae must be communicated 



