NOTES AND ABSTRACTS. 



239 



There are other host plants besides the beet, but the attack takes 

 the form of spots only on the leaves. No typical curly-top symptoms 

 have been noted in these host plants except in the case of cabbage 

 observed in 1909. The beet-hoppers are said to migrate from weeds on 

 to the beets when they appear in May and June. 



A description of Euteitix tenella is given. It is a small insect, 

 often mistaken for white fly {Aleyrodes citri) one-eighth of an inch long, 

 of a yellowish-green tinge, looking white at a distance. It feeds both in 

 the larval and adult stage, the larval attack being the more severe. 



The disease cannot be due to the loss of plant juices only, but rather 

 to the introduction by the insect of some more active agent into the 

 tissues of the plant. 



Several remedies are recommended : — 



(1) Spraying with kerosene emulsion. 



(2) Eolling, if the insects appear when the beet-crop is quite young, 

 especially in dull damp weather when the insects are sluggish. 



(3) Early sowing, and healthy cultural conditions. 



(4) Dragging tarred boards in between the rows with some sort 

 of drag in front to agitate the leaves to make the insects hop. — D. M. C. 



Begronia Lucerna. By G. T. Grignan {Rev. Hort. August 16, 

 1910, pp. 380-1 ; coloured plate). — The plate represents a very hand- 

 some floriferous form, with panicles of from fifty to eighty rich rose 

 I red and light pink flowers springing from dark green, spotted foliage, 

 with red under-surface. It is described as a perpetual bloomer, capable' 

 of resistance to dry air for several weeks, and hence particularly adapted 

 for temporary indoor decoration. — G. T. D. 



Betula Maximowiczii {Bot. Mag. tab. 8337). — Nat. ord. Cupuli- 

 ferae; trihQ Betuleae. Japan, Saghalien, and Manchuria. Tree, some- 

 ; times reaching 100 feet in height; leaves broadly ovate, 3-6 inches 

 long and 3^ inches wide, deeply cordate, serrate. Male catkins 

 fascicled, 3-4-| inches long; female, 2-4 loose racemes, 1^ inch long. 



G. H. 



Bordeaux Mixture, Copper in Tea sprayed with. By H. E. 



Annett and S. Chundra Kar {Jour. Agr. Sci. iii. pt. 3, pp. 314-316, 

 Sept. 1910). — Bordeaux mixture havmg been used for spraying tea 

 attacked by the fungus Exobasidium vexans, it was thought desirable 

 to ascertain how much copper was present on the sprayed leaves. The 

 leaves were picked nine days after the spraying and analysed, when it 



, was found that the sprayed leaves contained^ grain of copper per lb., 

 the unsprayed J-^- grain. The method of analysis is given. Thus tea 

 normally contains copper, as do many other plants, cocoa being one 



i with a high content ('09 to "22 grain per lb.). The quantity of copper 



I taken in tea which had been sprayed with Bordeaux mixture would 

 thus be almost inappreciably small (about '0002 grain contained in 



[eight teaspoonfuls). — F. J. C. 



