NOTES AND ABSTRACTS. 



509 



"oes to the bud-scale, and there passes the winter. Of preventives, 

 dusting with flowers of sulphur causes the foliage to be scorched, and 

 picking off the attacked leaves is a long process and interferes with the 

 nourishment of the tree. Of other remedies to destroy the mites on 

 the bark, apphed during winter after the leaf has fallen, the following 

 may be mentioned: — 



1. Equal parts creosote, lime, and water, stir and apply with a 

 brush. 



2. Alcohol 1 litre, soft soap 1 kilo, stir the soap in the alcohol till 

 perfectly mixed, add 12 litres water, and paint or spray. 



3. Alcohol I litre, corrosive sublimate 1 gramme, water ^ litre, 

 paint or spray with care to the person spraying. 



4. Petroleum 9 kilos, fish oil 2 kilos, carbonate of soda 1 kilo, 

 add water to make 100 litres, stir well to make it milky, this can be 

 used with the spray-pump. 



5. Lime and sulphur spray is valuable as a paint or spray, having 

 tlie additional advantage of being a fungicide; even brushing the trees 

 with plain water destroys a number of these parasites. 



During summer hydrocyanic acid gas is an effective insecticide, 

 though somewhat difficult to manage, and needs careful management 

 or it may be dangerous to the operator; the method is described. 

 Mr. Lenglet, in La Pom. Franc, 1910, June, pp. 172-174, has found 

 carbolineum emulsion, applied in spring before buds open, valuable, 

 destroying a great quantity of other insects as well, cleansing the bark 

 in a wonderful way, the moss and lichen loosening at once with the 

 contact of the brush. The cost of the mixture is small, it is made 

 by dissolving 2 kilos of soft soap in 4 litres of boiling water, mix 

 little by little 1 kilo of carbolineum and put in bottle. For use add 

 equal quantities of water and apply with spray-pump. 



Mr. Eeynaud, in La Pom. Franc, for 1910, March, p. 74, finds 

 this mite has preference for certain varieties of pear; he gives the 

 following notes for the department Hautes-Alpes : — 



Varieties most attacked. — ' Doyenn6 d'hiver,' ' Bergamotte 

 Esperen,' ' Beurre Giffard,' * Williams' Bon Chretien.' 



Varieties a little less attached. — ' Doyenne de Juillet,' * Citron des 

 Oarmes,' * Beurre Hardy,' ' Beurre Diel,' * Beurre d'Amanlis,' 

 ' Beurre d'Hardenpoint, ' ' Passe Colmar, ' ' Passe Crassane,' ' Doyenne 

 d'Alen9on,' ' Souvenir de Jules Guindon.' 



Varieties still less attacked. — 'Beurre Picquery,' 'Beurre de 

 I'Assomption, ' ' Epargne, ' ' Fondante des bois,' ' Certeau d'Automne,' 

 ' Louise Bonne d'Avranches, ' ' Le Lectier, ' ' Martin sec,' ' Catillac,' 

 ' Beurr^ blanc,' ' Beurr6 Clairgeau.' 



Varieties least attacked. — 'Bon Chretien d'6t6,' 'Belle de Mai,' 

 ' Clapp's Favourite,' ' Eoyale d'Hiver, ' 'Belle des Abr^s,' ' Cur6,' 

 ' Virgouleuse. ' — C. H. H. . •. 



Pear Thrips and its Control, The. By Dudley Moulton 

 [O.S.A. Dep. Agr., Bur. Entom., Bull 80, pari iv. ; Sept. 1, 1909; 

 vor, SXXVI. L L 



