223 



Outbreaks of Aphids were checked by autumn spraying. Aphis 

 sorbi has been experimentally reared on apple throughout the summer 

 without any indication of the appearance of the true sexual forms in 

 the autumn, and all individuals were killed by the severe winter. 

 In the field the winter is passed on plantain. This species has also been 

 found infesting wild crab {Mains rivnlaris). Studies on the relation of 

 the activity of Aphis pomi to environmental factors are yielding 

 valuable information. 



Minor pests recorded are pear thrips [Taeniothrips inconsequens], 

 codling moth [Cydia pomonella], grasshoppers, filbert bud mite [Erio- 

 phyes avellanae] and a Cerambycid boring in gooseberr}/. 



Osservatorio Autonomo di Fitopatologia, Turin. Monthly leaflets nos. 

 1-10, January-November 1920, 48 pp. 



The injurious insects reported during the year included : — 



Lepidoptera : Cosstis cossus on apple and birch ; Cnethocampa 

 pityocampa on pine ; Clysia amhiguella and Polychrosis hotrana on 

 vine ; Aegeria (Sesia) asiliformis on poplar ; Cydia funebrana on 

 apricot ; C. splendana on chestnut ; C. pomonella on apple and pear ; 

 C. {Grapholita) nebritana on peas ; Malacosoma {Gastropacha) neustria 

 on pear ; Nygmia phaeorrhoea ( Eiiproctis chrysorrhoea) on chestnut 

 and pear ; Hyponomeuta malinelkis on apple ; Pieris brassicae on 

 cabbage; Porthetria [Lymantria) dispar on pear; Procris {I no) 

 ampelophaga on vine ; and Zeuzera pyrina on beech. 



Coleoptera : Anthonomus pomorum on apple ; Balanimis nuctim 

 on hazel ; B. elephas on chestnut ; Cetonia hirtella on vine ; Galeru- 

 cella luteola on elm ; Haltica oleracea on cabbage ; Epicometis hirta 

 on pear and vine ; Scolytus (Eccopiogaster) scolytus on elm ; Bnichus 

 [Laria) irresectus in beans ; Lytta vesicatoria on ash ; By discus 

 hetalae {Rhynchites behileti) on poplar and vine ; Saperda carcharias 

 on poplar ; and Scolytus ( Eccopiogaster) nigulosus on cherry. 



Hymenoptera : Eriocampoides limacina {Eriocampa cerasi) on pear. 



Orthoptera : Gryllotalpa gryllotalpa on potato. 



Rhynchota: Aonidia lauri on laurel; Brevicoryne {Aphis) 

 hrassicae on 2iri\c\ioke ; A.fabae on beans; A. persicae on peach; 

 Aspidiotus hederae {nerii) on Aucuba and oleander ; Aulacaspis 

 pentagona on mulberry, lilac, jasmin, mandarin orange and peach ; 

 A . rosae on rose ; Chionaspis euonymi on Euonymus ; Ceroplastes 

 rusci on fig ; Chrysomphalus dictyospermi on lemon ; Chermes { Adelges) 

 abietis on fir ; Eriosoma {Schizoneura) lanigermn on apple ; Leucaspis 

 pusilla on pine ; Lepidosaphis uhni {Mytilaspis pomorum) on pear and 

 willow ; L. beckii {M. citricola) on orange and lemon ; and 

 Physokermes piceae on fir. 



Diptera : Acidia heraclei on celery ; Contarinia pisi on peas ; and 

 Rhagoletis cerasi on cherry. 



Mites : Eriophyes avellanae on hazel ; E. vitis on vine ; E. trislriatits 

 on walnut ; E. {Phytoptus) pyri on pear and vine ; and Tetranychtts 

 telarius on vine and horse chestnut. 



FuLMEK (L.). Die Milbenschwindsueht des Hafers. [The Mite Disease 

 of Oats.] — Nachrichten Deutschen Landw.-Ges. f. Osterr., 1919, 

 no. 1, p. 6. (Abstract in Biedermann's Centralbl., Leipsic, xlix, 

 no 9, September 1920, pp. 349-351.) 



The oat mite, Tarsonemiis spirifex, has been recorded from France, 

 Germany, Holland and Sweden. In 1918 the author found it in 



