540 



thrips, probably Kalolhrips pisivorus, Westw. {Thrips fohustus, Uzel), 

 was recorded from one locality. On potatoes Cetonia aural a, L., 

 occurred in two localities, and Gorti/na [Hydroecia) micacea, Esp., in 

 another. 



Pests of Cruciferous plants included Julus londinensis, wireworms, 

 Blitophaga opaca, L., and Haltica nemorum, L., which last appeared in 

 enormous numbers during the dry period in May and June. Drought 

 being very favourable to these flea-beetles, the problem of combating 

 them is partly one of retaining the moisture in the soil. This may be- 

 effected by heavy manuring and thorough working of the soil, as well 

 as by spreading saltpetre on the top of the furrow immediately 

 after the seed has been sown. In several instances arsenical sprays 

 have been applied with great success. Ceulhorrhynchus sulcicollis, 

 Gyll., Pieris brassicae, L., P. napi, L., Polia {Barathra) oleracea, L., and 

 Barathra brassicae, L., were also recorded on cabbages, etc. Plutella 

 macidipennis, Curt., appeared in great numbers, and it is considered 

 likely that an outbreak of this moth will occur in 1919. Eurydema 

 oleraceum, L., Tipula oleracea, L., and Phorbia {ChortopliUa) brassicae, 

 Bch., were also reported. 



Apple trees were attacked by Xyleborus dispar, F. ; Cantharis obscura, 

 L., which infested the blossoms ; Anthonomus piomonim, L., which was 

 present in exceptionally great numbers ; Aporia crataegi, L. ; Hibernia 

 defoliaria, CI. ; Cheimatobia brumata, L. ; Argyroploce {Olethreutes) 

 variegana, Hb. ; Cydia pomonella, L. ; Argyresthia conjugeUa, Z. ; 

 Hyponomeuta variabilis, Z. ; Blastodacna atra. Haw. {putripennella, Z.) ; 

 Leucoptera (Cemiostofna) scitella, Z. ; Coleophora sp. ; Cossus cossus, L. ; 

 Aphis pomi, DeG. ; Psylla pyrisuga, Forst. ; F. ; Taeniotlirips incon- 

 sequens, Uzel ; Euthrips pyri, Dan. ; Thrips flavus, Schr. ; Para- 

 fetranychus {Tetranychus) pilosus, C. & F. ; and Eriophyes jryri, Pgst. 



Pests of pear trees, besides several of the foregoing, included 

 Melolontha hippocastani, F. ; Capsid bugs ; Eriocampoides limacina, 

 Retz. ; Contarinia {Diplosis) pyrivora, Ril. ; Perrisia (Dasyneiira) pyri, 

 Bch. ; and Paratelranyclius pilosus, C. & F. 



Plums and cherries were attacked by Cheimatobia. brumata, L. ; Cydia 

 (Grapholitha) funebrana, Tr. ; Hyalopterus arundinis, F. {primi, F.) ; 

 Tetranychus telarius, L. ; Luperus rufipes. L. ; Episema {Diloba) 

 coeruleocephala, L. ; Argyresthia ephippiella, F. ; A. nitidella ; Aphis 

 cerasi. Gooseberries were injured by Pteronus {Nematus) ribesH, Scop. ; 

 Vanessa c-album, L. ; Thamnonorna ivavaria, L. ; and Eulecanium 

 {Lecanium) corni, Bch. 



On currants Incurvaria capiteUa, CI., was more numerous than usual. 

 The larvae of this moth hibernate when half grown and enter the buds 

 in the spring, completely destroying them and often also excavating 

 the young shoots. At the end of May they are full grown and pupate 

 either in the groimd or on the bushes. In June the moths appear and 

 oviposit on the young berries, the young larvae entering the berries 

 and destroying the seed. In the middle of July the larvae leave the 

 berries and spin a white cocoon in which they hibernate. In experi- 

 ments with a lime-sulphur winter spray-, 82% of the larvae were killed, 

 with paraffin emulsion 65%, and with nicotine 22%. When the attack 

 is discovered in the spring, cutting off and burning the attacked buds 

 and shoots is recommended. Leaves of black and red currants mined 

 by the larvae of Incurvaria pectineci, Hb., weje sent from one locality. 



