508 



Friederichs (K.). Korte Samenvatting der Bestrijdingsmaatregelen 

 tegen den Koffiebessenboeboek {Stephanoderes hampei, Ferr.)* 

 [A Short Resume of the Measures against the Coffee-berry Borer, 

 5. hampei.'] — Meded. van h. Koffiebessenboehoek- Fonds, Soerabaya, 

 no. 2, June 1922, pp. 27-36. 



In cases of severe infestation " rampassen " [see above] must be 

 carefully carried out after the harvest has been picked and before 

 mid-October. All fallen berries must be buried so that they rot rapidly ; 

 this may be done by digging them under or by collecting and then 

 burying them, which must be completed not later than mid-November. 

 When ripe berries again invite attack in January they must be plucked. 

 Bored berries should be thrown into a 5 per cent, solution of creolin, and 

 the harvested berries taken to the factory in bags of a texture that 

 precludes the escape of any beetles. They can be killed at the factory by 

 keeping the berries under water for five days. 



In the case of slightly infested plantations, infested berries, both 

 ripe and unripe, should be collected throughout the year, or the unripe 

 berries may be brushed with petroleum, a fine brush being used to 

 convey the petroleum to the bore hole and thus kill the beetle. To 

 encourage the parasitic fungus the plantation must be well shaded at the 

 beginning of the rainy season. 



Plantations that are not infested should not acquire coffee seed from 

 attacked estates. The implements used in harvesting serve to spread 

 infestation and should be cleansed by immersion in boiling water. 

 If the coffee bushes are kept dwarf by pruning and are not too close 

 together, the above measures, as well as harvesting, will be facilitated. 



Friederichs (K.). VoorschriJt voor eene Statistiek over de Boeboek- 

 Aantasting op de Koffieondernemingen. [A Plan for Statistics on 

 Beetle Infestation on a Coffee Estate.] — Meded. van h. Koffiebes- 

 senboeboek- Fonds, Soerabaya, no. 2, June 1922, pp. 37-42. 



Statistics on the extent of infestation are needed to ascertain 

 the effect of the measures employed. The method outlined in this 

 paper is specially planned for conditions in Java in reference to 

 Stephanoderes hampei. 



VAN Poeterex (N.). Verslag over de Werkzaamheden van den 

 Plantenziektenkundigen Dienst in de Jaren 1920 en 1921. 



[Report on the Work of the Phytopathological Service in the 

 Years 1920 and 1921.] — Verslagen en Meded. Plantenziekten. 

 Dienst, Wageningen, no. 27, July 1922, 92 pp., 2 plates. 



In an infestation of plums by Magdalintis pruni, L., tits were seen 

 pecking the larvae out of the dead branches. A sawfly, Hoplocampa 

 fulvicornis, also occurred on plums. Inairvaria capiteUa and Aegeria 

 (Sesia) tipuliformis infested red currants. A Nematode infesting straw- 

 berries was identified as Aphelenchus ornierodis, Ritz. Bos, by Dr. 

 de Man, who expressed a doubt whether this was not identical v^dth 

 A. modestus, de Man, repeatedly found living free in the ground. A 

 grasshopper, Tachycines asynamorus, Adel., was found in a greenhouse. 



Chermes pini infested Pinus sylvestris, P. excelsa and P. onentalis. 

 This Aphid chiefly reproduces parthenogenetically on P. sylvestris ; 

 in this case the generations living on the intermediate host, P. orientalis, 

 including the sexuales, are entirely cut out, 



