375 



In Sumatra both Helopeltis and Pachypeltis were energetically com- 

 bated as soon as noticed so that little loss resulted. A twig-boring 

 beetle, probably Xyleborus fornicatus, a Psychid, AcantJwpsyche sp., a 

 bunch caterpillar [Andraca apodeda, Swinh.], and Stauropus alternus, 

 occurred here and there. Old nursery beds were attacked by Megachile 

 sp., but no serious harm was done. 



VAN Hall (C. J. J.). Ziekten en Plagen der Cultuurgewassen in 

 Nederlandsch-Indie in 1921. [Diseases and Pests of Cultivated 

 Plants in the Dutch East Indies in \92\]—Meded. hist. 

 Plantenziekten, Biiitenzorg, no. 53, 1922, 46 pp. 



Coffee was subject to increased attacks by the berry borer, 

 Stephanoderes liampei, Ferr. Scale-insects did no great damage, 

 though Coccus {Lecanium) viridis (accompanied by a troublesome ant, 

 Oecophylla smaragdina), Pseudococcus virgatits and P. crotonis (?) 

 were not unimportant in some localities. Xyleborus coffeae and 

 Zeuzera coffeae caused some losses ; in one district the former was 

 checked by a Chalcid. 



Forest pests included Calotermes iectonae, which did much injury 

 to teak in Central Java, while a root-boring beetle, Xyleborus sp., 

 severely attacked young mahogany. Young teak trees infested by 

 white scales were bored by the larvae of Dichocrocis punctiferalis. 



Potatoes suffered comparatively little from the attack of a 

 Coccinellid, Epilachna, which had been very injurious previously, and 

 the potato weevil, Cylas formicariiis {turcipennis) , also did little harm. 



Cassava was infested by mites as usual ; the losses due to Tetranychus 

 bimaculatus were, however, unimportant. 



Kedele [Glycine soja] was attacked chiefly b}^ the pod borer, Etiella 

 zinckenella, while the stem borer, Agromyza sojae, caused loss in one 

 district. Chrysomelid beetles and Sphingid and Noctuid caterpillars 

 also attacked this crop. The caterpillars of another moth, probably 

 Aproaerema nerteria, injured ground-nuts {Arachis) as well as kedele. 



Coconut pests included Brachartona [catoxanthd], Parasa lepida, 

 Hidari irava, the coconut beetle, Oryctes rhinoceros, and the palm 

 weevil, Rhynchophorus ferrugineus. Hispid beetles did severe injury 

 in Celebes in the dry season. 



I Cacao was attacked by the cacao moth [Acrocercops cramerella], 

 which was numerous, and by a borer, Xyleborus sp. 



Rubber on some estates was infested by Coptotermes gcsfroi, but 

 rarel}^ to a disquieting extext. 



Cotton suffered some injury from Farias fabia. 



Cinchona pests included Helopeltis, Euproctis flexuosa (in the dry 

 season), mites and thrips. In one case the attack by thrips was so 

 severe that all the full-grown leaves were lost. 



Oil palms were infested by Oryctes rhinoceros, 0. trituberculatus, 

 Rhynchophorus ferrugineiis, Psychids, and a Scolytid beetle. 



Bananas were injured by the moth, Nacoleia {Notarcha ocfasema). 



Ricinus was attacked by a Noctuid, Achaea janata {Ophiusa melicerta) 

 and by leaf-caterpillars. 



Pepper at an experiment station was badly injured, probably by a 

 bug, Elasmognathus heivitti, which sucked the young fruits. 



Rice pests included Schoenobius incertellns {bipunctifer), Nymphnla 

 [depunctalis], Scirpophaga [sericea], Spodoptera mauritia, Holotrichia 

 helleri, a bug {Nezara), a Pierine butterfly {Catopsilia crocale), and a 

 gall-midge (Cecidomyia sp.). 



