12 



are very few and practically of no importance, and I know of 

 no disease affecting the trees, but in planting, a good variety should 

 be selected. 



Grapefruit 

 See Pomelo and under Lemons. 



Lemons 



The lemon, with the orange, the grapefruit and the lime, and a 

 few other unimportant members of the citrus family are subject 

 to far more insect pests and diseases than any other crop, trees or 

 plants of the County. These trees all grow thriftily where reason- 

 able moisture is supplied, even in quite frosty location, not how- 

 ever in the frost conditions prevailing north of the mountains. 

 But profitable fruit production does not always accompany thrifty 

 growth. 



In considering a citrus grove investment, the following con- 

 ditions must absolutely be present for success. They are, a good 

 soil, plentiful water supply at reasonable cost, and reasonable 

 freedom from frost and wind. These secured, and good trees free 

 from insects or disease planted, and the grower is ready to begin 

 the fight, which will last as long as he has trees, against insect 

 pests and disease. 



These might be enumerated as follows : Black Scale ; Red Scale ; 

 Yellow Scale; Oleander Scale; Soft Brown Scale; Hemispherical 

 Scale; Purple Scale; Citrus Mealy Bug; Longtailed Mealy Bug; 

 Citrus Red Spider; Silver Mite; Citrus Thrips; with several other 

 pests watching an opening to invade our State and causing us an 

 expense of thousands of dollars each year to keep them out; but 

 in spite of all these drawbacks, intelligent and industrious growers 

 have realized surprising profits from lemons, oranges and grape- 

 fruit in the last twenty-five years. 



In addition to the above troubles, tree diseases must be watched 

 for: Gum Disease; Wither-tip; Die-back; Lack of nourishment 

 (Chlorosis) and several other diseases of less importance. 



The lemon crop is injured also by the brown rot, and more than 

 the other citrus fruits by the unexpected frosts, yet Los Angeles 

 County shipped last year 1,200,000 boxes of lemons, 2,790,000 boxes 

 of oranges, 18,900 boxes of grapefruit, at least three-fourths of 

 them all, marketed at an excellent profit. 



