102 SOFT ORANGE SCALE. 



appear applicable also to this kind, and likewise a 

 recipe for a soft-soap and paraffin mixture found useful 

 for ordinary Scale insects, with directions for use. But 

 whatever is used, the chance of success depends much 

 on the method of application : I therefore take leave to 

 give the remainder of Prof. MacOwan's advice on this 

 subject, in his own words (from the paper above quoted), 

 as it could not be more clearly and strongly conveyed, 

 and I would particularly draw attention to the good 

 advice given in italics : 



" A powerful syringe, or rather force-pump, with a 

 portable reservoir, is used to swish every part of the 

 foliage from the inside. After the soap-lye has been on 

 the tree for 24 hours in dry, or say 36 hours in cool 

 damp weather, the syringing is repeated with plain 

 water, to get rid of both soap and the dead Scale insects. 

 If the water is as hot as the hand can bear, say 95 to 

 100, it will be all the better. By this means, perse- 

 veringly kept up, Mr. W. W. Dickson, of Ceres Eoad, 

 starting with a plantation of neglected trees, covered 

 with Scale, soon got them all as clean as the palm of 

 my hand, and good growth followed straight away. Now 

 as to the wash. For a first application, supposing Scale 

 to be badly developed, take 4 Ibs. soft-soap and a full 

 quart of paraffin oil ; rub into the soap, little by little, 

 a gallon of hot water, and, when emulsionised into a 

 uniform oily mass, add the oil the same way. Dilute 

 this down for use with nine gallons of warm water, 

 and keep thoroughly mixed while using with the force- 

 pump. 



" Mr. Dickson used the soapy liquor of the wool- wash, 

 and thus utilised an otherwise useless lye-product. For 

 a subsequent application the lye may be somewhat 

 weaker. A good force-pump mounted on a barrel to 

 hold the lye, or the subsequent wash-water, may cost 

 3 or 4, and is worth every penny of the money. The 

 delivery hose should be mounted on a tube 3^ or 4 feet 

 long, and the labourer, dressed in a sack with holes for 

 head and arms, gets up inside the spread of the tree, if 



