270 



In the treatment of damaged grain, tests were carried out on the 

 efEects of quickhme on (1) good, (2) weevily, (3) tainted, (4) damp and 

 damaged, (5) mouse-tainted wheat. In each case the wheat was first 

 passed through a small wheat cleaning machine, then mixed with 1 per 

 cent, of its weight of quick-lime and stored for 14 days. It was found 

 that the addition of quick-lime to sound grain is in no way harmful, 

 and may even effect some shght improvement. In the case of weevily 

 wheat it caused the removal of the adult weevils and the infested grain 

 upon screening, but the weevils were not killed, this being effected only 

 by adding lime at a high temperature. The tainted wheat lost nearly 

 20 per cent, and the musty and mousey odours were much reduced,, 

 though their complete removal would require contact for several 

 months with lime applied fresh and hot. Damp wheat proved to be 

 incapable of conversion into a wholesome article, though the odour 

 and bacteria present were materially reduced by the lime. The- 

 treatment of mouse-tainted wheat gaVe very satisfactory results,. 

 which showed, however, that the lime, to be effective, must be applied 

 hot. 



ScHENK (P. J.). De Erwtenkever. [The Pea Weevil.] — Tijdschr. 

 Plantenzielien, Wageningen, xxiv, no. 1, 15th February 1918,. 

 pp. 15-24, 1 fig. 



The information given in this article on Bruchus pisorum has been 

 taken from existing literature, and the remedial measures advised are 

 the usual ones, consisting of exposure to a temperature of 122° F., 

 fumigation with carbon bisulphide or hydrocyanic acid gas, and the 

 warming of the peas during the month of February, thus inducing the 

 beetles to emerge. 



ScHOEVEKS (T. A. C). De Bloedluis {Schizoneura lanigera, Hausmann). 

 [The Woolly Aphis, Eriosoma lanigerum.] — Tijdschr. Planten- 

 ziekten, Wageningen, xxiv, no. 1, 15th February 1918; Bijblad, 

 ]3p. 7-16, 2 figs. 



This article deals with Eriosoma lanigerum and its control from 

 a popular and practical point of view and contains no new information. 



DEN Doop (J. E. A.). De Verspreiding van Trichogramma, den Eipara- 

 siet van Heliothis obsdefa, Fabricius, ter Oostkust van Sumatra. 



[The Spread of Trichogramma, the Egg-Parasite of H. obsoJefa, on 

 the East Coast of Sumatra.]- Meded. Deli Proef slat ion, Medan, x, 

 no. 9, February 1918, pp. 213-220, 1 map. 



From 1908 to 1910 attempts to find egg-parasites of Heliothis 

 ohsoleta, F., in Java and Sumatra were unsuccessfully made by Dr. 

 L. P. de Bussy, who consequently introduced in 1911 Trichogramma 

 minutum {pretiosnm) from North America into Sumatra, where it has 

 now estabhshed itself [see this Review Ser. A, i, p. 13]. 



Since 1916 the author has investigated the hosts of this parasite 

 and its spread under field-conditions. Insects parasitised in the labora- 

 tory are not necessarily attacked in the field and vice versa. In the 

 field most of the parasites are small and with weak ovipositors, so that 



