328 



The work of the Don Bureau for the control of pests since its 

 inauguration is reviewed by A. N. Buchheim. The director's report 

 by Zvierezomb-Zubovsky for 1919 has been prepared, but not yet 

 printed. The reports for 1917 and 1918, here mentioned, have already 

 been noticed [R.A.E., A, viii, 103-107]. The work of the station 

 was greatly curtailed, and at times completely stopped, during the 

 period of 1918-1920, owing to its position in the centre of war activities. 



As practically nothing is known of the plant pests of the south-east 

 of Russia, it is suggested that a specialist should be sent to investigate 

 the districts of Stavropol, Kuban, Terek and the Black Sea. 



The pests recorded by Rimsky-Korsakov as observed at the district 

 experiment station at Kniajesky Dvor, are : — Cephiis sp., on timothy 

 and other grasses {Calamagrostis epigeios, Agropyrum repens and 

 Dadylis glomerata) ; Harmolita {Isosoma) spp. on the above grasses, 

 as well as on Poa pratensis and Festnca ovina ; Cleigastra sp. and 

 Eremobia (Hadena) ochroleuca on timothy grass ; Depressaria depres- 

 sella on various umbelliferous plants ; Pieris brassicae, Brevicoryne 

 {Aphis) brassicae and Phorbia brassicae on cabbages ; Acrolepia 

 assectella and Crioceris merdigera on onions ; and Tetranychus sp. on 

 cucumbers. Three generations of frit fly [Oscinella frit] occurred on 

 oats and winter wheat, also the Hessian fly [Mayetiola destructor] on 

 rye, and Agromyza sp. on rye and oats. Currants were injured by 

 ZopJiodia convolntella, and apples by Psylla mali and Anthonomus 

 pomorinn. Special observations were made on Cydia {Grapholiilia) 

 strobilella, infesting pine cones, and on Byctiscus betulae. 



This bulletin also contains particulars of courses for the preparation 

 of specialists in economic phytopathology and applied zoology. 



General cultural measures for the protection of plants are discussed 

 b}' D. M. Korolkov, and their application is especialty urged in view 

 of the present difficulty in obtaining the appliances required for other 

 remedial measures. 



Bogdanov-Katkov (N. N.). PancOBblM [\BeTOe!\{Meligethesaeneus,F). 

 — DeTporpaACKafl CraHUMfl SaiuMTbi PacTeHHii ot BpeAMre/ieM 



[Petrograd Station for the Protection of Plants from Enemies], 

 Petrograd, 1920, 14 pp., 10 figs. [Received 30th April 1921.] 



The Nitidulid beetle, Meligethes aeneiis, F., is one of the chief pests 

 of cruciferous plants grown for seed in Russia. Its various stages 

 are described. In the Petrograd district the adults emerge from 

 hibernation in the soil from April to May. The plants attacked 

 include Rammculiis, Crocus reticidatus, Salix, Anemone ranuncidoides , 

 Caltha palustris, Viola sp., rye, wheat, and even fruit trees. Later 

 on, rape, beet, cabbage, mustard, turnips, etc., form the principal 

 food-plants. The adults feed on various parts of the flowers and 

 oviposit in the young flower buds [R.A.E., A, viii, 542J. The 

 eggs hatch in from 10 to 14 days, and the larvae feed on the interior 

 of the buds ; those of later development may also attack the pods. 

 The larvae appear at the beginning of June. Pupation occurs in the 

 soil 3 or 4 weeks later, and lasts about 12 to 15 days. In the district 

 under consideration two generations occur in the 3^ear. 



The natural enemies are Malachitis aoteus, F., Microgaster sp. and 

 probably Coccinella septempimctata, L. The remedial measures 

 advocated [cf. R.A.E., A, viii, 6] include cultural methods, spraying 

 with Paris green and covering the plants with cheese-cloth bags. 

 The latter is also beneficial by preventing cross-pollination. 



