300 



Baily (W.). Verslag van het ProeJstation Midden-Java over het 



Jaar 1920. [Report for 1920 of the Central Java Experiment 

 Station.]— Meded. Proefst. Mid.- Java, Salatiga, no. 36, 1921, 

 24 pp. 



A twig-borer appeared in numbers on some coffee estates. The 

 dangerous coffee bean-borer, Stephanoderes hampei, remained restricted 

 to one estate, Central Java being otherwise free from it. 



Cases of injury to Hevea by borers were rather numerous. In one 

 locality a small species of Xylehonis was found in healthy trees that had 

 never been tapped. It was observed that such covering preparations 

 as tar, etc., attract borers to some extent, and tap-wounds covered with 

 paraffin preparations have been attacked by borers on several occasions. 



G.\uDOT (G.). Les Sauterelles en Camargue. — //. Agric. Pratique, 

 Paris, XXXV, no. 15, 16th April 1921, p. 300. 



In view of the damage caused by African locusts in several localities 

 of the Bouches-du-Rhone district, a decree has been passed com- 

 pelling the application of remedial measures. The terms of the decree 

 are quoted and necessitate the determination and clear marking of 

 breeding areas, and a careful look out for the emergence of the young 

 hoppers from 1st March to 31st May 1921. As the eggs hatch the 

 responsibility for the destruction of the insects rests on the occupier 

 of the land infested, who must informi the proper authority. 

 Should the destruction not be completed within 48 hours, operations 

 will be carried out at the occupier's expense. The remedial measures 

 suggested include insecticides such as cresyl solution, coal tar oil and 

 chlorpicrin, flamethrowers and poison baits. 



Leone (G.). La Distruzione dell' Icerya pnrchasi nelle Oasi di Tripoli. 



[The Destruction of /. ptircliasi in "the Oases of Tripoli. 1 — L' A^ric. 

 Colon., Florence, xv, no. 3, ]\Iarch 1921, pp. 140-141. 



In order to combat the Coccid, Icerya pnrchasi, which has been 

 ravaging the Citrus trees in the oases of Tripoli, the author obtained 

 with the help of the Portici Entomological Station about 100 specimens 

 of the Coccinellid, Novius cardinalis. In a few months the success 

 of this measure became so marked that the natives are themselves 

 assisting in the spread of this beneftcial ladybird. 



RiTZEMA Bos (J). Mijn Proefveldje bij het Instituut voor Phyto- 

 pathologie van 1906 to 1920. [My Experimental Plot at the 

 Institute of Phytopathology from 1906 to \920.]—TijdscIjr. 

 Plantenziekten, Wageningen, xxvii, no. 3, March 1921, pp. 29-44. 



One of the observations made showed that with adequate manuring 

 winter rye was successfully grown for 14 consecutive years in the same 

 field without infestation by pests. The freedom from infestation must 

 be due to the absence of pests at the beginning of the period, and this 

 refutes the author's former opinion that Tylenchus devasiatrix and 

 Heterodera schachtii are present in some number in all soils and that 

 a succession of the same crop leads to their increase. 



