834 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



The larvae of gallflies attack the new hud on budded roses. This 

 may be prevented by binding the part with yarn soaked in linseed oil 

 and tobacco extract. 



The roots of rose-trees are attacked by the larvte of cockchafers, 

 garden chafers, click beetles (Elateridae), daddy-longlegs {Tipulidae), 

 and Bibio hortnlanus. These pests may be destroyed by boring holes 

 in the ground and pouring in carbon disulphide. The holes are then 

 plugged to prevent the fumes escaping. The treatment must be repeated 

 after an interval of a week. — S. E. W. 



Roses in the Rock Garden. By K. Geschwind {Oester. Gart. 

 Zeit. vol. V. pt. V. pp. 161-168; pt. vi. pp. 208-'216). — The author 

 strongly advocates the use of roses in the rock garden. For this pur- 

 pose they should be grown on their own roots, as it is difficult to 

 remove suckers. They must be planted in deep pockets so as to have 

 abundant run for their roots. The hardier roses may be surrounded 

 by dwarf-growing plants such as Amhis, Auhretia, Campanula, 

 Aqiulegia, Cyclamen, Hepatica, Iheris, Lychnis, Primulas, &c. ; but 

 roses requiring protection in winter should be associated with spring- 

 flowering bulbs, such as Crocus, S cilia sibirica, Chionodoxa, Ins 

 Xiphiuni and Xiphioides, Erythronium, Fritillaria Meleagris, and 

 Galantkus.—S. E. W. 



Roses, New. By F. Henkel {Gar te?i flora, vol. hx. pt. vih. pp. 164- 



165 ; 1 col. plate). — ' Kiautschou ' is a single white rose from Kiao 

 Chao. The flowers are pale yellow when first open, but change to pure 

 white. 



'Micrugosa,' a cross between R. microphylla and R. rugosa, has 

 pink flowers with yellow stamens. It is fragrant, and remains in flower 

 a long time. — S. E. W . 



Rusts of Cereals. By P. Sorauer {Zeitschr. /. Pflanzeyikrank. 

 xix. 1909, Heft 4-5, p. 193). — An article of ninety-three pages, con- 

 sisting of a preliminary study for an international statistical survey of 

 cereal rusts. After the introductory pages the observations are collected 

 together under the following six headings : (1) Occurrences illustrating 

 the differences of intensity of rust in the same locality ; (2) Examples 

 of furthering the spread of rust by the co-operation of a variety of 

 circumstances ; (3) The decided connexion between weather conditions 

 and the occurrence of rust ; (4) Connexion between location and soil 

 conditions and rust ; (5) Influence of cultural conditions on intensity of 

 rust ; (6) Individual or race characters of cereals in relation to sensitive- 

 ness to rust. Under a seventh heading a general summary of the 

 observations is given, the culminating idea being that the rust disease 

 is one of " disposition " and the rust question for the future will be 

 a problem of breeding. — G. H. P. 



San Jos6 Scale, The, and Methods of Controlling- it. By 



W. E. Britton {U.S.A. Dep. Agr., Bur. Entom.., Bull. 165, Nov. 1909; 

 13 figs.). — No insect has caused so much destruction as San Jose scale. 



