486 



Insect Pests. 



cyanide, U oz, sulpburic, 'l ox. water to every 1,000 cubic feet of 

 space, three machines being used. 



This was found to Idll the mealy bug near the machines, but 

 altliouc^h fans were l^ept constantly going, some were alive between 

 ° the fumigation centres. 



At sufficient strength the 

 e'Tgs also can be killed, and 

 it is best to use this strength, 

 l)ut only on dormant vines. 



Tlie proportions are for 

 every 100 cubic feet, f to \ oz. 

 of potassium cyanide or \ to 

 1 oz. of sodium cyanide, and 

 for each ounce of cyanide 

 1 liquid ounce of sulphuric 

 acid previously diluted with 

 3 to -A oz. of water. 



For dormant vines the 

 greater strength may be used, 

 liut not on the pdants when 

 in foliage. 



r.esides fumigation, mealy bug may be checked by painting with 

 paraffin or methylated spirit, or with lime, sulphur and paraffin, 

 having previously scraped the wood. 



Eeferences. 



(1) Cousins, H. Journal S. E. Agricultural College, Xo. 9, p. 69. April (1900). 



(2) Theobald, F. T. lieport on Economic Zoology for the year ending 



April 1st, 1907, p. «2 (1907). 



[./. G. niuketi. 

 -:male mealy bucs. (x y. ) 



THE PHYLLOXERA. 



(I'lii/llo.'Xrii riistiiti'i.' 



riane.) 



This most serious vine pest has often been found in Britain 

 on vines under glass. It was known in England in 1803. The 

 I'hylloxera of the vine is an American insect, which spiread rapidly 

 when once introduced into Eurojie over France, I'ortugal, Switzer- 

 land and Oermany, and has occasioned enormous loss in France. 

 American vines seem to withstand its attack, but European varieties 

 suffer severely, both in California and in Europe. It has also made 

 its way into Australia and the Cape. Tlie insect is found in two 

 different forms, one on tlH> leaves and another on the roots. The 



