12 



scale. The owner assured me, that after doing everything that it was 

 possible to do with remedies, and making but little headway, he con- 

 cluded to treat the trees at the root; that if in this he did not succeed he 

 would go out of the business. He treated his trees for three years with 

 chemical fertilizers, and a marked effect was seen the year following the 

 first application. After the third year he could find but very few scale. 

 He continued to fertilize, and the result has been indeed wonderful. It 

 is now very difficult to find a live scale anywhere in his orchard. 

 Many of the trees yet bear the mark of the scale that once infested the 

 leaves. The trees that were once condemned and declared to be worth- 

 less are there to-day, bearing as much and as fine fruit as any other 

 trees that were never affected. The owner not being a wealthy grower 

 although in respectable circumstances manufactured his own fertilizers, 

 avoiding always the too free use of ammonia (after the first year), as 

 this causes the trees to go mostly to wood and leaf growth instead of 

 producing fruit. 



BUST MITE. 



Typhlodromus oleivorus, Ashmead. 



VII. 



[(a) Dorsal vein, (b) Lateral view, enlarged, (c) Egg, enlarged; dot in the center of 

 circle represents natural size.] 



This is a very dangerous pest, and one that is difficult to exterminate. 

 This rust mite attacks indiscriminately the various species of the citrus 

 in common cultivation, but has not been observed to feed upon plants of 

 any other genus. It is found upon the lime, lemon, citron, shaddock, 

 bigarde, and tangerine; and none of the varieties of the orange are known 

 to be in any degree exempt. Hubbard. 



The foliage of the trees attacked by it present a dry, dusty, and yellow- 

 ish appearance. This mite attacks the fruit when young, and retards 

 its growth, and when ripe has the appearance of russet apples. This 

 mite was first found on the wild or sour orange trees of Florida, and 

 from those it spread to the orchards, the trees having been transported 

 for cultivation from their native swamps. The mites feed upon the fruit 

 and leaves in droves of many thousands, attacking the former as rapidly 



