441 



Thompson (G. E.) Sudan Grass in Kansas.— Zarwas Agric. Exjpf. 

 Sta., Manhattan, Bull. no. 212, March 1916, 29 pp., 8 figs., 

 11 tables. [Received 30th August 1916.] 



Sudan grass [Andropogon sorghum] in Kansas is attacked in warm, 

 damp seasons by the sorghum midge [Contarinia sorghicola], with the 

 result that the setting of seed is aft'ected on all except early and late 

 crops. The foliage is injured by grasshoppers and chinch bugs [Blissus 

 leuco'ptera], but these pests may be readily controlled by suitable 

 methods. 



EscHERiCH (K.). Chjtus arcualus, L. (Cerambycide) als schlimmer 

 technischer Eichenschadling. [The Cerambycid, Clytus 

 arcuatus, L., an important pest of the o&k..\—N aiunvissenschftl. 

 Zeitschr. fiir Forst- n. Landwirtschaft, Stuttgart, xiv, no. 6, 

 June 1916, pp. 272-273. 



The Cerambycid, Clytus arcuatus, L., has not been much noticed in 

 the literature of forestry. Observations made in May 1916 in the 

 Rhine Palatinate show that this beetle must henceforth be classed 

 among the serious pests of the oak, its injury being about equal to that 

 done by Cerambyx cerdo, Platypus cylindricus or Xyleborus mono- 

 graphus. The larva bores deep into the wood, sometimes reaching 

 the centre of the stem, the numerous galleries greatly depreciating 

 the value of the timber. 



Zur Bekampfung der Schadlinge und Pilzkrankheiten unserer Obst- 

 baume. [The control of the insect and fungus pests of our fruit- 

 trees.] — Deutsche Landwirtschftl. Presse, Berlin, xliii, no. 66, 

 16th August 1916, p. 546. 



In this account of the control of fruit-tree pests it is stated that 

 Bordeaux mixture was abandoned because of the defohation following its 

 use. This trouble was also noticed with too concentrated a solution of 

 Cahfornian hme-sulphur mixture, but ceased when the proper degree 

 of dilution was ascertained. Winter spraying was discontinued and 

 two apphcations are made, the first immediately the young shoots 

 appear and the second after blossoming is completely over. Thorough- 

 ness in spraying is essential. The application will require to be renewed 

 in the case of heavy rain shortly after spraying. It is noted that many 

 insects are unaffected by strong poisons. A water-beetle, for instance, 

 seemed quite unaffected by a cupro-arsenical solution, in which it 

 swam and dived for over two hours. 



DupoNT (R. A.). Insect fiotes. —Extract from Agric. Rept., Seychelles, 

 1915. [MS. received from Colonial Office 24th August 1916.] 



Coffee in low-lying districts was severely attacked by Coccus 

 {Lecanium) viridis (green scale), but on the hills this insect was con- 

 trolled to a very considerable degree by a fungus, Cephalosporium 

 lecunii. The same fungus has also attacked Eucalymnatus {Lecanium) 

 tessellatum on cinnamon and coconut palms in low country during the 

 past three years. The ant, Technomyrmex albipes, was less abundant 

 in those plantations in which the scale-insects were controlled by 

 C. lecanii, but was prevalent in other localities. No evidence was 



(C322) Wt. Pl/106. 1,5U0. 11.16. B.& F.Ltd. Gp.11/3. A 



