102 



out by the French Minister of the Interior that the importation of 

 living plants from France has been responsible for the introduction 

 of numerous insect pests, and some of these are already threatening 

 the orange-growing industry, which is now increasing in the colony. 

 All shipments of apple trees have been found to be infested with 

 Schizoneura and apple-growing is rapidly being restricted in Algeria 

 in consequence. 



Trabut (Dr.). La defense des orangeries. [The protection of orange 

 groves.] — Rev. Horde, de VAlgerie, Algiers, xviii, no. 3, March 1914, 

 pp. 102-104. [Received 4th February 1915.] 



Algeria has been protected against Coccid infestation by the strict 

 anti-phylloxera legislation, but since the importation of living plants 

 has been permitted [see above] new Coccids have been introduced 

 (the reds cale, Chrj/somphalus aurantii, being the most dangerous), 

 chiefly on account of the resistance offered by the public to measures 

 of control. Co-operative control has been found the only really 

 efficient system, not only because the measures are general, but 

 because such insecticides as cyanide of potassium, which would be a 

 source of danger in the hands of individuals, can be used. 



Le Pou Rouge en Espagne. [The Red Scale in Spain.] — Rev. Hortic. 

 de VAlgerie, Algiers, xviii, no. 3, March 1914, p. 104. [Received 

 4th February 1915.] 



Orange plantations, consisting of trees in full bearing, used to be 

 valued at £400 per acre in the province of Valencia, bub in consequence 

 •of infestation by red scale, Chrysomphalus aurantii, they are now 

 only half as valuable. 



MoLz (E.) & Schroder (D.). [The Life Cycle of Sitona lineafa in 

 Germany.] — Zeitschrift f. wissensch. Insektenbiologie, Berlin, x, 

 nos. 8-9, 1914, pp. 273-275. 



The pea weevil, Sitones {Sitona) lineatus, L., which is recorded as 

 particularly injurious in England, should also be classed among the 

 dangerous insects in Germany. During 1913, the Experimental 

 Station for Plant Diseases at Halle, received notification of 14 occur- 

 rences of this insect which caused damage by devouring the edges of 

 leaves of leguminous crops ; seven outbreaks were on peas, two on 

 beans, two on lucerne, and one each on haricot beans, vetches, 

 clover and chicory. The writers have observed the larvae 

 towards the end of April and the adults towards the end of May. 

 In the open, the adults appear in April and May, as well as in 

 July and August, and it therefore appears that the beetle is double- 

 brooded in Germany, as in England. In order to reduce the damage 

 in the larval stage, which occurs on chicory and beets in April, it is 

 advisable to sow later in districts liable to attack. Since the larvae 

 begin to pupate at the end of April and beginning of May, the larval 

 stage will be almost completed before the plants appear. It is also 

 desirable to sow more thickly in the infested areas. 



