1919.\ INSECTS AFFECTING THE AVOCADO. 131 



drawn over the band it will serve to lengthen the visefulness of the band 

 by bringing some of the sticky portion to the surface. 



Sticky fly paper is used sometimes in place of the sticky bands. 

 This may be attached to the trunk by means of heavy twine tied 

 tightly around the upper and lower edges, and properly should be put 

 over a strip of cotton as described above. 



No. 2.— AXLE-GREASE, FISH OIL AND ROSIN BANDING- 

 MATERIAL 

 A tree banding material used in Europe ; reported as effective is 

 made as follows : — 



Axle-grease ... ... , ... pound 1 



Fish oil ... ... ... fluid ounce 1 



-r, :3 T ■ pounds 2 



rowdered rosm ... ... ••• / v j.- xu r 



(or any traction thereof). 



Heat the axle grease, to remove all of the water contained therein, 



in a cooking vessel having a capacity of at least 1 gallon. Then stir in 



the fish oil and finally the powdered rosin a little at a time. When the 



latter is dissolved, remove from the fire and the mixture is ready for 



use the next day. Apply to tarred papei- bands as already described. 



No. 3.— TREE TANGLE FOOT. 

 A ready made mixture under above name is made by the O. & W. Thum 

 Company of Grand Rapids, Mich., U.S.A. ; the makers claim that it 

 can be applied direct to the bark of trees and will not injure them. I 

 have tried it without b,\d effects on lime trees. It remains sticky for 

 several mouths. 



No. 4.— RESIN WASH. (U.S. Dept. of Agr. Formula.) 



Stock Solution. 



Powdered Resin ... ... ... ... 10 lb. 



Caustic soda ... ... ... ... 2^ ,, 



Whale oil ... ... ... ... 20 ounces. 



Water ... ... ... ... .. 5 gallons. 



The first two ingredients are placed in a kerosene oil tin with a 

 gallon of water. Boil until the resin is melted then add Whale oil. 

 Boil until liquid has a dark brown colour. From one to two hours will 

 be necessary. Care should be taken that the liquid does not boil over 

 and when \\ater is added it should be poured in slowly and thoroughly 

 mixed. Before taking off from fire add water and fill tin. 



For use take one bottle (quart) of this stock and add to a kerosene 

 tin full of water. This forms a strong solution that will kill most 

 insects and not injure plants. Add nicotine sulphate at the rate of 1 oz. 

 to every 5 gallons for mealy bugs. 



No. 5.— NICOTINE SULPHATE OF BLACK LEAF 40. 



Nicotine sulphate is a ready made insecticide of an excellent quality. 

 It has good killing qualities and does not burn foliage easily. The 

 labels of the makers give full directions for mixing. The following 

 mixture will be useful. 



Black Leaf 40 ... ... ... lA teaspoonfuls. 



Water ... ... ... ... 1 gallon. 



Soap ... ... ... ... 1 ounce. 



Black leaf 40 can be added to Bordeaux mixture and Resin wash. 



* (Ignited States Depaitment of Agriculture Farmers' Kull. 90S). 



