IDEAL FERTILIZERS 29 



a great fondness for moist horse manure. Orange dogs 

 must be hand picked. 



The serious pest of young trees is the scale. Procure 

 a lens and examine any roughness found on trunk, twigs 

 or leaves. If whitefly is in your section that must be 

 controlled also. Luckily the same spray is effective for 

 both whitefly and scale, but the spray must be directed 

 to the infested areas. Whitefly lives on the under side 

 of the leaves ; scales are anywhere they happen to settle, 

 but are generally more numerous on the trunk and 

 branches. Both are sucking insects and must be killed 

 with contact insecticides. Yothers' Formula No. 3 is 

 the best mixture for this purpose known at the present 

 time, as it not only kills all the insects it hits but re- 

 mains on the trees several weeks in sufficient strength 

 to kill newly hatched larvae. It is made as follows: 

 Three measures Diamond Paraffine Oil, two of whale-oil 

 soap and one of water. While rapidly beating the soap 

 add the oil, a few drops at a time. It should form a 

 creamy emulsion. Gradually add the water as the beat- 

 ing is continued. Test for perfect emulsion by putting a 

 little in a glass of water. If free oil forms on the sur- 

 face the mixture must be beaten longer and perhaps a 

 little more soap added. When thoroughly emulsified use 

 one part of this stock solution to fifty parts of water. 

 To have the greatest effect spraying should be done soon 

 after the young are hatched. 



Criticisms The above is not the only way to set a 

 grove. Probably there is not a citrus grower in the State 



