221 



HiNCHiNGBRooKE (W. P.). Mealy Bug on Vines. — Gardeners' Chron., 

 London, Ixix, no. 1779, 29th January 1921, p. 58. 



With reference to the preceding paper, successful control of mealy 

 bugs on vines by spraying and dressing with nicotine soap is described. 



Dunn (D. H.). Mealy Bug on Vines. — Gardeners' Chron., London. 

 Ixix, no. 1781, 12th February 1921, p. 80. 



At Aberystwyth mealy bugs [Pseudococous] have been controlled by 

 fumigating the house, after the grapes are cut and the foliage ripe, 

 with 4 oz. of potassium cyanide (98 per cent.) to every 1,000 cu. ft. 

 During the winter the rods were barked, ancl then dressed with a 

 strong solution of caustic soda and a little soft soap, working the 

 solution well in with a paint brush. The house was fumigated again 

 with 3 oz. potassium cyanide to 1,000 cu. ft. just before starting the 

 vines. The vines are now dressed annuall}/ with caustic soda solution, 

 and are quite free from the pest. 



Hartley (R. M.). The Auricula and Woolly Aphis. — Gardeners' 

 Chron., London. Ixix, no. 1787, 26th March 1921, p. 152. 



Tramia auriculae, a woolly Aphid infesting auriculas, was completely 

 controlled by removing the plants in April from the house in which they 

 had flowered. The flower-stalk and all yellow leaves were pulled off 

 and burnt. The roots were freed from soil, washed in water and then 

 plunged in XL-all liquid insecticide (1 part to 5 of water) for one minute. 

 They were then shaken fairly dry and repotted in pots previously 

 scrubbed with a paraffin and soft-soap mixture, 1 : 30 in hot water. 



Pteris ( — ). The Raspberry Gall Fly. — Gardeners Chron., London, 

 Ixix, no. 1788, 2nd April 1921, p. 166. 



In cases of attack by Lasioptera riibi on raspberry canes, the infested 

 portions of the plant "should be cut off and burnt. Early recognition 

 of the presence of this midge should prevent any serious extension of it. 



Russell (H. L.) & Morrison (F. B.). Pea Moth Investigations 

 and other Insect Pests in 1920. — Wisconsin Agric. Expt. Sta., 

 Madison, Bull. 323, December 1920, pp. 44-46, 1 fig. 



The first eggs of the pea moth [Cydia novimundi, Heinr.] [R. A.E., 

 A, ix, 100] hatched on 23rd July, and the larvae emerged from the pea 

 pods from 6th to 29th August. Garden and field peas are the only 

 plants at present definitely known to be attacked by this pest. Pods 

 of wild vetch have been found to be infested with a very similar insect, 

 but its identity has still to be proved. The results of experiments with 

 regard to early planting as a preventive measure are not consistent ; 

 some of the earliest plots were more heavily infested than those planted 

 at a later date [cf. R.A.E., A, ix, 15]. the presence of the moth in 

 a field depends to a great extent on the direction of the wind and the 

 location of the field with respect to it. Crop rotation is advocated as 

 a remedial measure. 



Grasshoppers were unusually abundant in several counties during 

 1920, the damage in one county amounting to about £20,000. Rye, 

 wheat and oats were attacked, as well as pastures and hay crops. 



