242 



Britton (W. E.) & Davis (J. W.). Brown-Tail Moth Work, Season of 

 1914-15. — Bejpt. Connecticut Agric. Expt. Sta. 1915, New Haven, 

 1916, pp. 111-114. [Received 25th April 1916.] 



Control measures against the brown-tail moth {Euprodis chrysorrhoea) 

 consisted of an attempt to determine the spread of the insect beyond 

 the present quarantined area and of the collection of nests in towna 

 already infested in order to ascertain the presence of introduced 

 parasites. The introduced natural enemies of the brown-tail and gipsy 

 moths which have become well-established in Connecticut include : — 

 Apanieles lacteicolor, Vier. ; Pteromalus egregius, Foerster ; Monodon- 

 tomerus aereus, Walk. ; Meteorus versicolor, Wesm. ; Compsilura 

 concinnata, Meigen, and Calosoma sycophanta, L. These insects are 

 not yet sufficiently abundant to keep the pests in check, and artificial- 

 control measures must be practised in order to reduce the areas infested 

 to a minimum. 



Britton (W. E.) & Lowry (Q. S.). Experiments in Controlling the 

 Cabbage Maggot in 1915. — Rept. Connecticut Agric. Expt. Sta., 

 1915, New Haven, 1916, pp. 114-118, 1 plate. [Received 25th 

 April 1916.] 



Chortophila {Phorbia) brassicae, Bch. (cabbage root maggot), was 

 very abundant and injurious during the year. Adults appeared early 

 and the first eggs were found on 28th April. In the control experi- 

 ments, plants on thoroughly ploughed and manured ground were- 

 chosen. The first larvae were found on 18th May, being more abundant 

 at the lower or north end of the field. Of the various control measures 

 tested, tarred paper disks, crude carbolic acid emulsion, and lime- 

 sulphur sludge proved the most effective. Many eggs were found to 

 be laid on, under, and around the disks, but the resulting injury only 

 amounted to 4*4 per cent. Crude carbolic acid emulsion was prepared 

 according to the formula : — 1 lb. hard soap or 1 qt. soft soap ; 1 gal. 

 boiling water ; 1 pt. crude carbolic acid. About 3 oz. were poured 

 around the stem of each plant on 28th April and 27tli May. Examina- 

 tion on 18th June showed an average loss of 6 per cent. Lime-sulphur 

 sludge, diluted with five times its bulk of water, and applied on 26th 

 April at the rate of 3 oz. per plant, gave a resulting loss of 10 "8 per cent.. 

 The loss in untreated plants was 23'3 per cent. 



Britton (W. E.). A destructive European Pine Sawfly in Connecticut 



(Diprion {Lophyrus) similis, Hartig). — Rept. Connecticut Agric. 

 Expt. Sta.., 1915, New Haven, 1916, pp. 118-125, 3 plates. 

 [Received 25th April 1916.] 



Lophyrus pini, L. {similis, Hart.) is known to occur in five localities^ 

 in Connecticut, the food-plants being Pinus strobus (white pine), 

 P. excelsa (Japanese pine), P. laricio var. austriaca (Austrian pine), 

 P. sylvestris (Scotch pine), P. montana (mugho pine), P. koraiensis 

 (Korean pine), P. densiflora, P. cembra and P. flexilis. In Europe, 

 injury by this insect has been reported in Russia, France, Prussia, 

 Sweden and England. Under insectary conditions in Connecticut in 

 1915, two complete generations were observed and males of the third 



