485 



Froggatt (W. W.). Insects and St. John's Wort. — Acpic. Go-. 

 N.S.W., Sydney, xxx, no. 7, 2nd July 1919, pp. 470-472, 6 figs. 



The recently discovered native scale-insect attacking St. John's 

 wort, here described as leery a hyjjerici, sp. n., should prove to be an 

 efEective agent in destroying this weed. The larvae are reproduced in 

 hundreds, and the Coccid lives on the roots under the shelter of the 

 soil. 



Froggatt (W. W.). The White Grub or Grass Root Beetle {Scitala 

 pruinosa, Dalm.). — Agric. Gaz. N.S.W., Sydney, xxx, no. 7, 

 2nd July 1919, pp. 505-508, 2 figs. 



The white grub, Scitala pruinosa, Dalm., is very destructive to 

 grass plots in New South Wales. The chief damage is caused by the 

 larvae attacking the roots. The beetles congregate on the foliage 

 of small trees, where they might be poisoned and trapped before they 

 burrow in the earth for oviposition. Natural enemies include birds, 

 of which starlings are the most effective. The spread of the beetles 

 to non-infested areas may be prevented by sinking hardwood boards 

 into the soil to prevent migration of the grubs. If at all possible, 

 the land should be turned over at the first appearance of the pest, 

 this being a sure method of eradication. Where this is not practicable,., 

 a long-toothed rake might be drawn through the soil and the grubs 

 collected. 



Ehrhorn (E. M.). Division of Plant Inspection. — Hawaiian Forester 

 (£• Agriculturist, Honolulu, xvi, no. 7. July 1919, pp. 183-184. 



The pests intercepted during the month of June included purple 

 scale [Lppidosaphes beckii] on orange plants from the United States. 



L' Arboriculture fruitiere dans le Nord de I'Afrique. Cerisier. — Rev. 

 Horiic. de VAlgerie, Algiers, xxiii, nos. G-7, June- July 1919, 

 pp. 261-273. 



Cherry trees in Algeria are attacked by practically the same pests 

 as those injuring plums. The most important of these is the 

 Buprestid, Capnodis tenehrionis, L. (tenebrioides, Pall.) frequentlv 

 occurring on wild pears. The eggs of this beetle are laid at the base 

 of tlie trunks and the larvae descend to the roots, where they often 

 cause tlie death of the tree. The adults should be destroyed when 

 possible, but the best remedy is to protect the trunks by a coating 

 of lime mixed with sulphur, arsenic and copper sulphate, bearing 

 in mind that oviposition begins in May. An affected tree can sometimes 

 be saved by collecting and destroying the larvae. Injections "of 

 carbon bisulphide are suggested as for Phylloxera, or calcimn carbide 

 might be tried, a small quantity being placed at the level of the 

 deepest roots, and watered if the weather is dry. In many of the 

 coast localities this Buprestid is the principal obstacle to the cultivation 

 of plum-trees. 



The plum Scolytid [? Scolytus jiruni] is also a pest of peaches and 

 cherries. Oviposition occurs in the spring in tunnels in the bark 



