2. ANIMALS INJURIOUS TO FRUIT TREES. 



THE PEAR=LEAF BLISTER MITE. 



Eriopyes piri (Pagenst.), Nal. 



The trees referred to in my previous Report 1 that in 1909 had 

 most of the leaves blistered with this mite, and which showed a 

 material improvement in 1910, after being sprayed twice in the spring 

 of that year with potassium sulphide solution, were sprayed early in 

 September, 1910, with the potassium sulphide and lime, and then twice 

 in the spring of 1911 with the potassium sulphide, with the result that 

 it has been quite impossible to find a badly blistered leaf on the trees 

 and only a very few that were blistered at all. 



THE WHITE WOOLLY CURRANT SCALE. 



Pulvinaria vitis var. ribesiae, Sign. 



In Worcestershire and Warwickshire this scale has been very 

 prevalent during the past season, and in a few cases the attack has 

 been serious. 



A full account was given in my 4th Report, 2 and I there pointed 

 out that the pest was best attacked by spraying with caustic soda 

 emulsion in winter ; this summer, however, I have had considerable 

 success with an alcoholic solution of nicotine, which destroyed quite 

 90 per cent, of the young scales. I hope to make further experiments 

 with this fluid on other scales during the coming season. 



ON THE LOCOMOTION AND LENGTH OF LIFE OF THE 

 YOUNG OF PULVINARIA VITIS VAR. RIBESIAE, SIGN. 3 



In the June issue of the Journal of Economic Entomology, 4 ' Mr. 

 H. J. Quayle has an interesting paper on locomotion of certain young 



1 First Rpt. Econ. Biol., 1911, p. 16. 



'Mth Rpt. Inj. Insects, etc., 1907, p. 11. 



3 Reprinted from Journ. Econ. Biol., 1911, vol. vi, No. 4, pp. 139-142. 



4 1911, vol. iv, pp. 301-306. 



