100 



KuwANA (I.). Taisho shichinen no Gaichu-kai. [Observations on 

 Injurious Insects of 1918.] — Byochugai Zasshi [Journal of Plant 

 Protection], Tokyo, vi, no. 1, 5th January 1919, pp. 68-70. 



A summary is here given of the injurious insects that made their 

 appearance in 1918. The first generation of the two-brooded rice- 

 borer {CMlo simplex, Butl.) was more numerous than usual, though 

 the second was much less so except in one or two localities. The 

 three-brooded rice-borer {Schoenohius ineertelhis, Wlk.) was also 

 only numerous in the case of the first brood. Several leaf-hoppers 

 were present, but did not do serious damage to rice, though farmers are 

 warned against treating these pests as unimportant. The Pentatomids, 

 Aenaria lewisi, Scott, and Podops liirida, Burm., and many Lepidoptera 

 normally infesting rice did not do any marked damage during the year. 

 One area of the Kanagawa District that had suffered previously from 

 cabbage loopers escaped during the period under review. Midges 

 and scale-insects were present in great numbers on mulberries. The 

 year was remarkable for the small number of Aphids that made their 

 appearance. An outbreak of a disease of oranges caused by mites 

 and evidenced by a thickening of the skin was noticeable, as also were 

 radish-infesting borers. Icerya purchasi made its appearance in two 

 districts. The caterpillars of Phalera Jlavescens, Brem. & Grey, 

 occurred in several districts. An investigation as to the occurrence 

 of the melon-fly {Dacus cucurbitae, Coq.) in Nagasaki, Kagoshima and 

 Okinawa Districts, confirmed its absence. The Formosan orange fly 

 (Dacus dorsalis, Hendel) was however found in Okinawa (Loo-choo). 

 New occurrences of the Indian meal moth [Plodia interpunctella] were 

 reported, but the author is of opinion that there were no new 

 importations of this pest during the year. 



A conference of entomologists and plant pathologists of the Imperial 

 and Local Governments w^as held at the Department of Agriculture 

 and Commerce and another of the Kiushin Local Governments at 

 Kagoshima. Lecture classes were also held at the Imperial Agricul- 

 tural Experiment Station and Plant Quarantine Station for prefectural 

 entomologists and plant pathologists. 



Howard (L. 0.). Report of the Entomologist.— C7. ^. Dept. Agric., 

 Bureau Entom., Washington, D.C., 19th September 1918, 24 pp. 



This report of the work of the Bureau of Entomology for the year 

 ended 30th June 1918, contains a concise review of work done during 

 the year, emphasis being laid on those activities having a direct 

 bearing on war problems. 



Deciduous-fruit insect investigations under the direction of 

 Dr. A. L. Quaintance on the control of the codling moth [Cydia 

 ])omonella] showed that in the Grand Valley of Colorado six applica- 

 tions of 4 lb. powdered lead arsenate to 200 U.S. gals, water, with 

 the addition of 4 lb. fish-oil soap, was a very effective treatment. In 

 Oregon this pest is not only seriously injurious to apples but causes 

 much loss to pears. The effects of various sprays at different times and 

 under semi-arid conditions are under investigation in New Mexico, 

 the comparative effects of dusting and spraying being noted. Spraying 

 and dusting experiments with both lead arsenate and calcium arsenate 

 have been carried out in connection with the grape-berry moth 



